Oracle Linux 5 Security Technical Implementation Guide

U_Oracle_Linux_5_STIG_V1R12_Manual-xccdf.xml

The Oracle Linux 5 Security Technical Implementation Guide (STIG) is published as a tool to improve the security of Department of Defense (DoD) information systems. Comments or proposed revisions to this document should be sent via e-mail to the following address: [email protected]
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Version / Release: V1R12

Published: 2018-03-01

Updated At: 2018-09-23 19:16:40

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Vuln Rule Version CCI Severity Title Description
SV-63087r2_rule GEN000020 CCI-000213 MEDIUM The system must require authentication upon booting into single-user and maintenance modes. If the system does not require valid root authentication before it boots into single-user or maintenance mode, anyone who invokes single-user or maintenance mode is granted privileged access to all files on the system.System Administrator
SV-63187r2_rule GEN000280 CCI-000770 MEDIUM Direct logins must not be permitted to shared, default, application, or utility accounts. Shared accounts (accounts where two or more people log in with the same user identification) do not provide identification and authentication. There is no way to provide for non-repudiation or individual accountability.trueSystem AdministratorInformation Assurance Officer
SV-63251r1_rule GEN000300 CCI-000764 MEDIUM All accounts on the system must have unique user or account names. A unique user name is the first part of the identification and authentication process. If user names are not unique, there can be no accountability on the system for auditing purposes. Multiple accounts sharing the same name could result in the denial of service to one or both of the accounts or unauthorized access to files or privileges.System Administrator
SV-63255r1_rule GEN000320 CCI-000764 MEDIUM All accounts must be assigned unique User Identification Numbers (UIDs). Accounts sharing a UID have full access to each others' files. This has the same effect as sharing a login. There is no way to assure identification, authentication, and accountability because the system sees them as the same user. If the duplicate UID is 0, this gives potential intruders another privileged account to attack.System Administrator
SV-63333r1_rule GEN000400 CCI-000048 MEDIUM The Department of Defense (DoD) login banner must be displayed immediately prior to, or as part of, console login prompts. Failure to display the logon banner prior to a logon attempt will negate legal proceedings resulting from unauthorized access to system resources.System Administrator
SV-63363r1_rule GEN000440 CCI-000126 MEDIUM Successful and unsuccessful logins and logouts must be logged. Monitoring and recording successful and unsuccessful logins assists in tracking unauthorized access to the system. Without this logging, the ability to track unauthorized activity to specific user accounts may be diminished.System Administrator
SV-63383r1_rule GEN000460 CCI-000044 MEDIUM The system must disable accounts after three consecutive unsuccessful login attempts. Disabling accounts after a limited number of unsuccessful login attempts improves protection against password guessing attacks.System Administrator
SV-63391r1_rule GEN000480 CCI-002238 MEDIUM The delay between login prompts following a failed login attempt must be at least 4 seconds. Enforcing a delay between successive failed login attempts increases protection against automated password guessing attacks.System Administrator
SV-63649r1_rule GEN000520 CCI-000225 MEDIUM The root user must not own the logon session for an application requiring a continuous display. If an application is providing a continuous display and is running with root privileges, unauthorized users could interrupt the process and gain root access to the system.System Administrator
SV-63787r1_rule GEN000560 CCI-000366 HIGH The system must not have accounts configured with blank or null passwords. If an account is configured for password authentication but does not have an assigned password, it may be possible to log into the account without authentication. If the root user is configured without a password, the entire system may be compromised. For user accounts not using password authentication, the account must be configured with a password lock value instead of a blank or null value. System Administrator
SV-64341r1_rule GEN000880 CCI-000366 MEDIUM The root account must be the only account having a UID of 0. If an account has a UID of 0, it has root authority. Multiple accounts with a UID of 0 afford more opportunity for potential intruders to guess a password for a privileged account. System Administrator
SV-64353r1_rule GEN000900 CCI-000366 LOW The root users home directory must not be the root directory (/). Changing the root home directory to something other than / and assigning it a 0700 protection makes it more difficult for intruders to manipulate the system by reading the files root places in its default directory. It also gives root the same discretionary access control for root's home directory as for the other user home directories.System Administrator
SV-64359r2_rule GEN000920 CCI-000225 MEDIUM The root accounts home directory (other than /) must have mode 0700 or less permissive. Permissions greater than 0700 could allow unauthorized users access to the root home directory.System Administrator
SV-64373r4_rule GEN000940 CCI-000366 MEDIUM The root accounts executable search path must be the must contain only authorized paths. The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search to find executables. If this path includes the current working directory or other relative paths, executables in these directories may be executed instead of system commands. This variable is formatted as a colon-separated list of directories. If there is an empty entry, such as a leading or trailing colon, two consecutive colons, or a single period, this is interpreted as the current working directory. Entries starting with a slash (/) are absolute paths.System Administrator
SV-64387r1_rule GEN000960 CCI-000366 MEDIUM The root account must not have world-writable directories in its executable search path. If the root search path contains a world-writable directory, malicious software could be placed in the path by intruders and/or malicious users and inadvertently run by root with all of root's privileges. System Administrator
SV-64389r1_rule GEN000980 CCI-000770 MEDIUM The system must prevent the root account from directly logging in except from the system console. Limiting the root account direct logins to only system consoles protects the root account from direct unauthorized access from a non-console device.System Administrator
SV-63299r1_rule GEN000360 CCI-000366 MEDIUM GIDs reserved for system accounts must not be assigned to non-system groups. Reserved GIDs are typically used by system software packages. If non-system groups have GIDs in this range, they may conflict with system software, possibly leading to the group having permissions to modify system files.System Administrator
SV-63319r1_rule GEN000380 CCI-000366 LOW All GIDs referenced in the /etc/passwd file must be defined in the /etc/group file. If a user is assigned the GID of a group not existing on the system, and a group with the GID is subsequently created, the user may have unintended rights to the group. System Administrator
SV-63733r2_rule GEN006480 CCI-001259 MEDIUM The system must have a host-based intrusion detection tool installed. Adding host-based intrusion detection tools can provide the capability to automatically take actions in response to malicious behavior, which can provide additional agility in reacting to network threats. These tools also often include a reporting capability to provide network awareness of system, which may not otherwise exist in an organization's systems management regime.System Administrator
SV-63099r1_rule GEN000120 CCI-001227 MEDIUM System security patches and updates must be installed and up-to-date. Timely patching is critical for maintaining the operational availability, confidentiality, and integrity of information technology (IT) systems. However, failure to keep operating system and application software patched is a common mistake made by IT professionals. New patches are released daily, and it is often difficult for even experienced system administrators to keep abreast of all the new patches. When new weaknesses in an operating system exist, patches are usually made available by the vendor to resolve the problems. If the most recent security patches and updates are not installed, unauthorized users may take advantage of weaknesses present in the unpatched software. The lack of prompt attention to patching could result in a system compromise.System Administrator
SV-64461r1_rule GEN001140 CCI-000225 MEDIUM System files and directories must not have uneven access permissions. Discretionary access control is undermined if users, other than a file owner, have greater access permissions to system files and directories than the owner.System Administrator
SV-64463r2_rule GEN001160 CCI-000366 MEDIUM All files and directories must have a valid owner. Un-owned files and directories may be unintentionally inherited if a user is assigned the same UID as the UID of the un-owned files.System Administrator
SV-64467r1_rule GEN001180 CCI-000225 MEDIUM All network services daemon files must have mode 0755 or less permissive. Restricting permission on daemons will protect them from unauthorized modification and possible system compromise.System Administrator
SV-64487r3_rule GEN001260 CCI-001314 MEDIUM System log files must have mode 0640 or less permissive. If the system log files are not protected, unauthorized users could change the logged data, eliminating its forensic value.System Administrator
SV-63879r1_rule GEN001800 CCI-000225 MEDIUM All skeleton files (typically those in /etc/skel) must have mode 0644 or less permissive. If the skeleton files are not protected, unauthorized personnel could change user startup parameters and possibly jeopardize user files. System Administrator
SV-64537r1_rule GEN001320 CCI-000225 MEDIUM NIS/NIS+/yp files must be owned by root, sys, or bin. NIS/NIS+/yp files are part of the system's identification and authentication processes and are critical to system security. Failure to give ownership of sensitive files or utilities to root or bin provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.System Administrator
SV-64515r1_rule GEN001340 CCI-000225 MEDIUM NIS/NIS+/yp files must be group-owned by root, sys, or bin. NIS/NIS+/yp files are part of the system's identification and authentication processes and are, therefore, critical to system security. Failure to give ownership of sensitive files or utilities to root or bin provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.System Administrator
SV-64509r1_rule GEN001360 CCI-000225 MEDIUM The NIS/NIS+/yp command files must have mode 0755 or less permissive. NIS/NIS+/yp files are part of the system's identification and authentication processes and are critical to system security. Unauthorized modification of these files could compromise these processes and the system.System Administrator
SV-64517r3_rule GEN001280 CCI-000225 LOW Manual page files must have mode 0644 or less permissive. If manual pages are compromised, misleading information could be inserted, causing actions to compromise the system.System Administrator
SV-64525r2_rule GEN001300 CCI-001499 MEDIUM Library files must have mode 0755 or less permissive. Unauthorized access could destroy the integrity of the library files.System Administrator
SV-64477r2_rule GEN001200 CCI-001499 MEDIUM All system command files must have mode 0755 or less permissive. Restricting permissions will protect system command files from unauthorized modification. System command files include files present in directories used by the operating system for storing default system executables and files present in directories included in the system's default executable search paths.Elevate to Severity Code I if any file listed world-writable.System Administrator
SV-64483r1_rule GEN001220 CCI-001499 MEDIUM All system files, programs, and directories must be owned by a system account. Restricting permissions will protect the files from unauthorized modification.System Administrator
SV-64485r1_rule GEN001240 CCI-001499 MEDIUM System files, programs, and directories must be group-owned by a system group. Restricting permissions will protect the files from unauthorized modification.System Administrator
SV-64569r1_rule GEN001400 CCI-000225 MEDIUM The /etc/shadow (or equivalent) file must be owned by root. The /etc/shadow file contains the list of local system accounts. It is vital to system security and must be protected from unauthorized modification. Failure to give ownership of sensitive files or utilities to root or bin provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.System Administrator
SV-64557r1_rule GEN001380 CCI-000225 MEDIUM The /etc/passwd file must have mode 0644 or less permissive. If the passwd file is writable by a group-owner or the world, the risk of passwd file compromise is increased. The passwd file contains the list of accounts on the system and associated information.System Administrator
SV-64573r1_rule GEN001420 CCI-000225 MEDIUM The /etc/shadow (or equivalent) file must have mode 0400. The /etc/shadow file contains the list of local system accounts. It is vital to system security and must be protected from unauthorized modification. The file also contains password hashes which must not be accessible to users other than root.System Administrator
SV-63399r4_rule GEN002380 CCI-000368 MEDIUM The owner, group-owner, mode, ACL, and location of files with the setuid bit set must be documented using site-defined procedures. All files with the setuid bit set will allow anyone running these files to be temporarily assigned the UID of the file. While many system files depend on these attributes for proper operation, security problems can result if setuid is assigned to programs allowing reading and writing of files, or shell escapes. Only default vendor-supplied executables should have the setuid bit set.System AdministratorInformation Assurance Officer
SV-63459r2_rule GEN002440 CCI-000368 MEDIUM The owner, group-owner, mode, ACL and location of files with the setgid bit set must be documented using site-defined procedures. All files with the setgid bit set will allow anyone running these files to be temporarily assigned the GID of the file. While many system files depend on these attributes for proper operation, security problems can result if setgid is assigned to programs allowing reading and writing of files, or shell escapes.trueSystem AdministratorInformation Assurance Officer
SV-63421r3_rule GEN002400 CCI-000318 MEDIUM The system must be checked weekly for unauthorized setuid files as well as unauthorized modification to authorized setuid files. Files with the setuid bit set will allow anyone running these files to be temporarily assigned the UID of the file. While many system files depend on these attributes for proper operation, security problems can result if setuid is assigned to programs allowing reading and writing of files, or shell escapes.System Administrator
SV-63589r3_rule GEN002460 CCI-000318 MEDIUM The system must be checked weekly for unauthorized setgid files as well as unauthorized modification to authorized setgid files. Files with the setgid bit set will allow anyone running these files to be temporarily assigned the group id of the file. While many system files depend on these attributes for proper operation, security problems can result if setgid is assigned to programs allowing reading and writing of files, or shell escapes.System Administrator
SV-63441r1_rule GEN002420 CCI-000225 MEDIUM Removable media, remote file systems, and any file system not containing approved setuid files must be mounted with the nosuid option. The "nosuid" mount option causes the system to not execute setuid files with owner privileges. This option must be used for mounting any file system not containing approved setuid files. Executing setuid files from untrusted file systems, or file systems not containing approved setuid files, increases the opportunity for unprivileged users to attain unauthorized administrative access.System AdministratorECLP-1
SV-63691r1_rule GEN002500 CCI-000366 LOW The sticky bit must be set on all public directories. Failing to set the sticky bit on the public directories allows unauthorized users to delete files in the directory structure. The only authorized public directories are those temporary directories supplied with the system or those designed to be temporary file repositories. The setting is normally reserved for directories used by the system and by users for temporary file storage, (e.g., /tmp), and for directories requiring global read/write access.System Administrator
SV-63705r1_rule GEN002520 CCI-000225 MEDIUM All public directories must be owned by root or an application account. If a public directory has the sticky bit set and is not owned by a privileged UID, unauthorized users may be able to modify files created by others. The only authorized public directories are those temporary directories supplied with the system or those designed to be temporary file repositories. The setting is normally reserved for directories used by the system and by users for temporary file storage, (e.g., /tmp), and for directories requiring global read/write access.System Administrator
SV-63801r1_rule GEN002560 CCI-000366 MEDIUM The system and user default umask must be 077. The umask controls the default access mode assigned to newly created files. An umask of 077 limits new files to mode 700 or less permissive. Although umask can be represented as a 4-digit number, the first digit representing special access modes is typically ignored or required to be 0. This requirement applies to the globally configured system defaults and the user defaults for each account on the system.trueIf the default umask is 000 or does not restrict the world-writable permission, this becomes a CAT I finding.System Administrator
SV-63809r1_rule GEN002640 CCI-000178 MEDIUM Default system accounts must be disabled or removed. Vendor accounts and software may contain backdoors allowing unauthorized access to the system. These backdoors are common knowledge and present a threat to system security if the account is not disabled.System Administrator
SV-63819r1_rule GEN002660 CCI-000169 MEDIUM Auditing must be implemented. Without auditing, individual system accesses cannot be tracked and malicious activity cannot be detected and traced back to an individual account.System Administrator
SV-63845r1_rule GEN002680 CCI-000162 MEDIUM System audit logs must be owned by root. Failure to give ownership of system audit log files to root provides the designated owner and unauthorized users with the potential to access sensitive information.System Administrator
SV-63883r1_rule GEN002700 CCI-000163 MEDIUM System audit logs must have mode 0640 or less permissive. If a user can write to the audit logs, audit trails can be modified or destroyed and system intrusion may not be detected. System audit logs are those files generated from the audit system and do not include activity, error, or other log files created by application software.System Administrator
SV-64247r1_rule GEN002720 CCI-000126 MEDIUM The audit system must be configured to audit failed attempts to access files and programs. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64263r1_rule GEN002740 CCI-000126 MEDIUM The audit system must be configured to audit files and programs deleted by the user. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-65285r1_rule GEN002800 CCI-000126 MEDIUM The audit system must be configured to audit login, logout, and session initiation. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64623r1_rule GEN002820 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise. System Administrator
SV-64233r1_rule GEN003720 CCI-000225 MEDIUM The inetd.conf file, xinetd.conf file, and the xinetd.d directory must be owned by root or bin. Failure to give ownership of sensitive files or utilities to root provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration possibly weakening the system's security posture.System Administrator
SV-64239r1_rule GEN003740 CCI-000225 MEDIUM The xinetd configuration files must have mode 0640 or less permissive. The Internet service daemon configuration files must be protected as malicious modification could cause Denial of Service or increase the attack surface of the system.System Administrator
SV-63977r1_rule GEN003760 CCI-000225 MEDIUM The services file must be owned by root or bin. Failure to give ownership of sensitive files or utilities to root or bin provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration possibly weakening the system's security posture.System Administrator
SV-63983r1_rule GEN003780 CCI-000225 MEDIUM The services file must have mode 0644 or less permissive. The services file is critical to the proper operation of network services and must be protected from unauthorized modification. Unauthorized modification could result in the failure of network services.System Administrator
SV-63875r1_rule GEN001780 CCI-000366 LOW Global initialization files must contain the mesg -n or mesg n commands. If the "mesg -n" or "mesg n" command is not placed into the system profile, messaging can be used to cause a Denial of Service attack.System Administrator
SV-64115r1_rule GEN003900 CCI-000366 MEDIUM The hosts.lpd file (or equivalent) must not contain a + character. Having the '+' character in the hosts.lpd (or equivalent) file allows all hosts to use local system print resources.System Administrator
SV-64119r1_rule GEN003920 CCI-000225 MEDIUM The hosts.lpd (or equivalent) file must be owned by root, bin, sys, or lp. Failure to give ownership of the hosts.lpd file to root, bin, sys, or lp provides the designated owner, and possible unauthorized users, with the potential to modify the hosts.lpd file. Unauthorized modifications could disrupt access to local printers from authorized remote hosts or permit unauthorized remote access to local printers.System Administrator
SV-64121r1_rule GEN003940 CCI-000225 MEDIUM The hosts.lpd (or equivalent) must have mode 0644 or less permissive. Excessive permissions on the hosts.lpd (or equivalent) file may permit unauthorized modification. Unauthorized modifications could disrupt access to local printers from authorized remote hosts or permit unauthorized remote access to local printers.System Administrator
SV-63607r1_rule GEN004360 CCI-000225 MEDIUM The alias file must be owned by root. If the alias file is not owned by root, an unauthorized user may modify the file adding aliases to run malicious code or redirect e-mail.System Administrator
SV-63637r2_rule GEN004380 CCI-000225 MEDIUM The alias file must have mode 0644 or less permissive. Excessive permissions on the aliases file may permit unauthorized modification. If the alias file is modified by an unauthorized user, they may modify the file to run malicious code or redirect e-mail.System Administrator
SV-63699r1_rule GEN004400 CCI-000225 HIGH Files executed through a mail aliases file must be owned by root and must reside within a directory owned and writable only by root. If a file executed through a mail aliases file is not owned and writable only by root, it may be subject to unauthorized modification. Unauthorized modification of files executed through aliases may allow unauthorized users to attain root privileges.System Administrator
SV-63739r1_rule GEN004420 CCI-000225 MEDIUM Files executed through a mail aliases file must have mode 0755 or less permissive. If a file executed through a mail aliases file has permissions greater than 0755, it can be modified by an unauthorized user and may contain malicious code or instructions potentially compromising the system.System Administrator
SV-63747r1_rule GEN004440 CCI-000366 LOW Sendmail logging must not be set to less than nine in the sendmail.cf file. If Sendmail is not configured to log at level 9, system logs may not contain the information necessary for tracking unauthorized use of the sendmail service.System Administrator
SV-63749r2_rule GEN004460 CCI-000126 MEDIUM The system syslog service must log informational and more severe SMTP service messages. If informational and more severe SMTP service messages are not logged, malicious activity on the system may go unnoticed.System Administrator
SV-63751r3_rule GEN004480 CCI-000225 MEDIUM The SMTP service log file must be owned by root. If the SMTP service log file is not owned by root, then unauthorized personnel may modify or delete the file to hide a system compromise.System Administrator
SV-63753r3_rule GEN004500 CCI-000225 MEDIUM The SMTP service log file must have mode 0644 or less permissive. If the SMTP service log file is more permissive than 0644, unauthorized users may be allowed to change the log file.System Administrator
SV-62959r1_rule GEN004880 CCI-000225 MEDIUM The ftpusers file must exist. The ftpusers file contains a list of accounts not allowed to use FTP to transfer files. If this file does not exist, then unauthorized accounts can utilize FTP.System Administrator
SV-62981r1_rule GEN004900 CCI-000225 MEDIUM The ftpusers file must contain account names not allowed to use FTP. The ftpusers file contains a list of accounts not allowed to use FTP to transfer files. If the file does not contain the names of all accounts not authorized to use FTP, then unauthorized use of FTP may take place.System Administrator
SV-63009r1_rule GEN004920 CCI-000225 MEDIUM The ftpusers file must be owned by root. If the file ftpusers is not owned by root, an unauthorized user may modify the file to allow unauthorized accounts to use FTP.System Administrator
SV-63079r1_rule GEN004940 CCI-000225 MEDIUM The ftpusers file must have mode 0640 or less permissive. Excessive permissions on the ftpusers file could permit unauthorized modification. Unauthorized modification could result in Denial of Service to authorized FTP users or permit unauthorized users to access the FTP service.System Administrator
SV-63103r1_rule GEN004980 CCI-000130 LOW The FTP daemon must be configured for logging or verbose mode. The -l option allows basic logging of connections. The verbose (on HP) and the debug (on Solaris) allow logging of what files the ftp session transferred. This extra logging makes it possible to easily track which files are being transferred onto or from a system. If they are not configured, the only option for tracking is the audit files. The audit files are much harder to read. If auditing is not properly configured, then there would be no record at all of the file transfer transactions.System Administrator
SV-62955r1_rule GEN004820 CCI-001475 MEDIUM Anonymous FTP must not be active on the system unless authorized. Due to the numerous vulnerabilities inherent in anonymous FTP, it is not recommended. If anonymous FTP must be used on a system, the requirement must be authorized and approved in the system accreditation package.trueSystem AdministratorInformation Assurance Officer
SV-63119r1_rule GEN005080 CCI-000366 HIGH The TFTP daemon must operate in secure mode which provides access only to a single directory on the host file system. Secure mode limits TFTP requests to a specific directory. If TFTP is not running in secure mode, it may be able to write to any file or directory and may seriously impair system integrity, confidentiality, and availability.System Administrator
SV-63163r1_rule GEN005100 CCI-000225 HIGH The TFTP daemon must have mode 0755 or less permissive. If TFTP runs with the setuid or setgid bit set, it may be able to write to any file or directory and may seriously impair system integrity, confidentiality, and availability.System Administrator
SV-63159r1_rule GEN005120 CCI-000225 MEDIUM The TFTP daemon must be configured to vendor specifications, including a dedicated TFTP user account, a non-login shell such as /bin/false, and a home directory owned by the TFTP user. If TFTP has a valid shell, it increases the likelihood someone could log on to the TFTP account and compromise the system.System Administrator
SV-63199r3_rule GEN005160 CCI-000297 MEDIUM Any X Windows host must write .Xauthority files. .Xauthority files ensure the user is authorized to access specific X Windows host. If .Xauthority files are not used, it may be possible to obtain unauthorized access to the X Windows host.System Administrator
SV-63803r1_rule GEN006400 CCI-001435 MEDIUM The Network Information System (NIS) protocol must not be used. Due to numerous security vulnerabilities existing within NIS, it must not be used. Possible alternative directory services are NIS+ and LDAP.System AdministratorInformation Assurance Officer
SV-64577r1_rule GEN001440 CCI-000225 LOW All interactive users must be assigned a home directory in the /etc/passwd file. If users do not have a valid home directory, there is no place for the storage and control of files they own.System Administrator
SV-64579r1_rule GEN001460 CCI-000225 LOW All interactive user home directories defined in the /etc/passwd file must exist. If a user has a home directory defined that does not exist, the user may be given the / directory, by default, as the current working directory upon logon. This could create a Denial of Service because the user would not be able to perform useful tasks in this location.System Administrator
SV-64585r1_rule GEN001480 CCI-000225 MEDIUM All user home directories must have mode 0750 or less permissive. Excessive permissions on home directories allow unauthorized access to user files.System Administrator
SV-64589r1_rule GEN001500 CCI-000225 MEDIUM All interactive user home directories must be owned by their respective users. If users do not own their home directories, unauthorized users could access user files.System Administrator
SV-63825r1_rule GEN001520 CCI-000225 MEDIUM All interactive user home directories must be group-owned by the home directory owners primary group. If the Group Identifier (GID) of the home directory is not the same as the GID of the user, this would allow unauthorized access to files.System Administrator
SV-63339r2_rule GEN001860 CCI-000225 MEDIUM All local initialization files must be owned by the home directorys user or root. Local initialization files are used to configure the user's shell environment upon login. Malicious modification of these files could compromise accounts upon logon.System Administrator
SV-63345r1_rule GEN001880 CCI-000225 MEDIUM All local initialization files must have mode 0740 or less permissive. Local initialization files are used to configure the user's shell environment upon login. Malicious modification of these files could compromise accounts upon logon.System Administrator
SV-63843r1_rule GEN001580 CCI-000225 MEDIUM All run control scripts must have mode 0755 or less permissive. If the startup files are writable by other users, they could modify the startup files to insert malicious commands into the startup files.System Administrator
SV-63849r4_rule GEN001600 CCI-000366 MEDIUM Run control scripts executable search paths must contain only authorized paths. The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search to find executables. If this path includes the current working directory or other relative paths, executables in these directories may be executed instead of system commands. This variable is formatted as a colon-separated list of directories. If there is an empty entry, such as a leading or trailing colon, two consecutive colons, or a single period, this is interpreted as the current working directory. Paths starting with a slash (/) are absolute paths.System Administrator
SV-63855r1_rule GEN001640 CCI-000225 HIGH Run control scripts must not execute world-writable programs or scripts. World-writable files could be modified accidentally or maliciously to compromise system integrity.System Administrator
SV-63591r1_rule GEN002000 CCI-000196 MEDIUM There must be no .netrc files on the system. Unencrypted passwords for remote FTP servers may be stored in .netrc files. Policy requires passwords be encrypted in storage and not used in access scripts.System Administrator
SV-63831r1_rule GEN001540 CCI-000225 LOW All files and directories contained in interactive user home directories must be owned by the home directorys owner. If users do not own the files in their directories, unauthorized users may be able to access them. Additionally, if files are not owned by the user, this could be an indication of system compromise.trueSystem AdministratorInformation Assurance Officer
SV-63837r1_rule GEN001560 CCI-000225 LOW All files and directories contained in user home directories must have mode 0750 or less permissive. Excessive permissions allow unauthorized access to user files. trueSystem AdministratorInformation Assurance Officer
SV-63651r1_rule GEN002120 CCI-000366 MEDIUM The /etc/shells (or equivalent) file must exist. The shells file (or equivalent) lists approved default shells. It helps provide layered defense to the security approach by ensuring users cannot change their default shell to an unauthorized unsecure shell.System Administrator
SV-63671r2_rule GEN002140 CCI-000366 MEDIUM All shells referenced in /etc/passwd must be listed in the /etc/shells file, except any shells specified for the purpose of preventing logins. The shells file lists approved default shells. It helps provide layered defense to the security approach by ensuring users cannot change their default shell to an unauthorized unsecure shell.System Administrator
SV-64285r1_rule GEN000760 CCI-000017 MEDIUM Accounts must be locked upon 35 days of inactivity. On some systems, accounts with disabled passwords still allow access using rcp, remsh, or rlogin through equivalent remote hosts. All that is required is the remote host name and the user name match an entry in a hosts.equiv file and have a .rhosts file in the user directory. Using a shell called /bin/false or /dev/null (or an equivalent) will add a layered defense. Non-interactive accounts on the system, such as application accounts, may be documented exceptions.trueSystem Administrator
SV-63677r1_rule GEN002200 CCI-000225 MEDIUM All shell files must be owned by root or bin. If shell files are owned by users other than root or bin, they could be modified by intruders or malicious users to perform unauthorized actions.System Administrator
SV-63713r1_rule GEN002220 CCI-000225 HIGH All shell files must have mode 0755 or less permissive. Shells with world/group write permissions give the ability to maliciously modify the shell to obtain unauthorized access.System Administrator
SV-63209r3_rule GEN002260 CCI-000318 LOW The system must be checked for extraneous device files at least weekly. If an unauthorized device is allowed to exist on the system, there is the possibility the system may perform unauthorized operations.System AdministratorInformation Assurance Officer
SV-63229r3_rule GEN002280 CCI-000225 MEDIUM Device files and directories must only be writable by users with a system account or as configured by the vendor. System device files in writable directories could be modified, removed, or used by an unprivileged user to control system hardware.System Administrator
SV-63241r1_rule GEN002300 CCI-000225 MEDIUM Device files used for backup must only be readable and/or writable by root or the backup user. System backups could be accidentally or maliciously overwritten and destroy the ability to recover the system if a compromise should occur. Unauthorized users could also copy system files.trueSystem AdministratorInformation Assurance Officer
SV-64237r1_rule GEN005740 CCI-000225 MEDIUM The Network File System (NFS) export configuration file must be owned by root. Failure to give ownership of the NFS export configuration file to root provides the designated owner and possible unauthorized users with the potential to change system configuration which could weaken the system's security posture.System Administrator
SV-64199r1_rule GEN005760 CCI-000225 LOW The Network File System (NFS) export configuration file must have mode 0644 or less permissive. Excessive permissions on the NFS export configuration file could allow unauthorized modification of the file, which could result in Denial of Service to authorized NFS exports and the creation of additional unauthorized exports.System Administrator
SV-64189r1_rule GEN005800 CCI-000225 MEDIUM All Network File System (NFS) exported system files and system directories must be owned by root. Failure to give ownership of sensitive files or directories to root provides the designated owner and possible unauthorized users with the potential to access sensitive information or change system configuration which could weaken the system's security posture.System Administrator
SV-64169r1_rule GEN005820 CCI-000062 MEDIUM The Network File System (NFS) anonymous UID and GID must be configured to values without permissions. When an NFS server is configured to deny remote root access, a selected UID and GID are used to handle requests from the remote root user. The UID and GID should be chosen from the system to provide the appropriate level of non-privileged access.System Administrator
SV-64163r1_rule GEN005840 CCI-000366 MEDIUM The Network File System (NFS) server must be configured to restrict file system access to local hosts. The NFS access option limits user access to the specified level. This assists in protecting exported file systems. If access is not restricted, unauthorized hosts may be able to access the system's NFS exports.System Administrator
SV-64157r1_rule GEN005880 CCI-000225 MEDIUM The Network File System (NFS) server must not allow remote root access. If the NFS server allows root access to local file systems from remote hosts, this access could be used to compromise the system.System AdministratorInformation Assurance OfficerInformation Assurance Manager
SV-64147r1_rule GEN005900 CCI-000225 MEDIUM The nosuid option must be enabled on all Network File System (NFS) client mounts. Enabling the nosuid mount option prevents the system from granting owner or group-owner privileges to programs with the suid or sgid bit set. If the system does not restrict this access, users with unprivileged access to the local system may be able to acquire privileged access by executing suid or sgid files located on the mounted NFS file system.System AdministratorInformation Assurance OfficerInformation Assurance Manager
SV-63577r1_rule GEN006580 CCI-000366 MEDIUM The system must use an access control program. Access control programs (such as TCP_WRAPPERS) provide the ability to enhance system security posture.System Administrator
SV-63571r2_rule GEN006600 CCI-000126 MEDIUM The systems access control program must log each system access attempt. If access attempts are not logged, then multiple attempts to log on to the system by an unauthorized user may go undetected.System Administrator
SV-64415r2_rule GEN002960 CCI-000225 MEDIUM Access to the cron utility must be controlled using the cron.allow and/or cron.deny file(s). The cron facility allows users to execute recurring jobs on a regular and unattended basis. The cron.allow file designates accounts allowed to enter and execute jobs using the cron facility. If the cron.allow file is not present, users listed in the cron.deny file are not allowed to use the cron facility. Improper configuration of cron may open the facility up for abuse by system intruders and malicious users.System Administrator
SV-64411r1_rule GEN002980 CCI-000225 MEDIUM The cron.allow file must have mode 0600 or less permissive. A readable and/or writable cron.allow file by users other than root could allow potential intruders and malicious users to use the file contents to help discern information, such as who is allowed to execute cron programs, which could be harmful to overall system and network security.System Administrator
SV-64405r1_rule GEN003000 CCI-000225 MEDIUM Cron must not execute group-writable or world-writable programs. If cron executes group-writable or world-writable programs, there is a possibility that unauthorized users could manipulate the programs with malicious intent. This could compromise system and network security.System Administrator
SV-64403r1_rule GEN003020 CCI-000225 MEDIUM Cron must not execute programs in, or subordinate to, world-writable directories. If cron programs are located in or subordinate to world-writable directories, they become vulnerable to removal and replacement by malicious users or system intruders.System Administrator
SV-64391r1_rule GEN003080 CCI-000225 MEDIUM Crontab files must have mode 0600 or less permissive, and files in cron script directories must have mode 0700 or less permissive. To protect the integrity of scheduled system jobs and prevent malicious modification to these jobs, crontab files must be secured.System Administrator
SV-64375r1_rule GEN003100 CCI-000225 MEDIUM Cron and crontab directories must have mode 0755 or less permissive. To protect the integrity of scheduled system jobs and to prevent malicious modification to these jobs, crontab files must be secured.System Administrator
SV-64293r1_rule GEN003120 CCI-000225 MEDIUM Cron and crontab directories must be owned by root or bin. Incorrect ownership of the cron or crontab directories could permit unauthorized users the ability to alter cron jobs and run automated jobs as privileged users. Failure to give ownership of cron or crontab directories to root or to bin provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.System Administrator
SV-64305r1_rule GEN003140 CCI-000225 MEDIUM Cron and crontab directories must be group-owned by root, sys, bin or cron. To protect the integrity of scheduled system jobs and to prevent malicious modification to these jobs, crontab files must be secured. Failure to give group-ownership of cron or crontab directories to a system group provides the designated group and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.System Administrator
SV-64313r2_rule GEN003160 CCI-000126 MEDIUM Cron logging must be implemented. Cron logging can be used to trace the successful or unsuccessful execution of cron jobs. It can also be used to spot intrusions into the use of the cron facility by unauthorized and malicious users. System Administrator
SV-64317r2_rule GEN003180 CCI-000225 MEDIUM The cronlog file must have mode 0600 or less permissive. Cron logs contain reports of scheduled system activities and must be protected from unauthorized access or manipulation. System Administrator
SV-64369r1_rule GEN003280 CCI-000225 MEDIUM Access to the at utility must be controlled via the at.allow and/or at.deny file(s). The "at" facility selectively allows users to execute jobs at deferred times. It is usually used for one-time jobs. The at.allow file selectively allows access to the "at" facility. If there is no at.allow file, there is no ready documentation of who is allowed to submit "at" jobs.System Administrator
SV-64371r1_rule GEN003300 CCI-000225 MEDIUM The at.deny file must not be empty if it exists. On some systems, if there is no at.allow file and there is an empty at.deny file, then the system assumes everyone has permission to use the "at" facility. This could create an insecure setting in the case of malicious users or system intruders.trueSystem AdministratorInformation Assurance Officer
SV-64379r1_rule GEN003320 CCI-000225 MEDIUM Default system accounts (with the exception of root) must not be listed in the at.allow file or must be included in the at.deny file if the at.allow file does not exist. Default accounts, such as bin, sys, adm, uucp, daemon, and others, should never have access to the "at" facility. This would create a possible vulnerability open to intruders or malicious users.System Administrator
SV-64453r1_rule GEN003340 CCI-000225 MEDIUM The at.allow file must have mode 0600 or less permissive. Permissions more permissive than 0600 (read, write and execute for the owner) may allow unauthorized or malicious access to the at.allow and/or at.deny files.System Administrator
SV-64469r1_rule GEN003360 CCI-000225 MEDIUM The at daemon must not execute group-writable or world-writable programs. If the "at" facility executes world-writable or group-writable programs, it is possible for the programs to be accidentally or maliciously changed or replaced without the owner's intent or knowledge. This would cause a system security breach.System Administrator
SV-64475r1_rule GEN003380 CCI-000225 MEDIUM The at daemon must not execute programs in, or subordinate to, world-writable directories. If "at" programs are located in, or subordinate, to world-writable directories, they become vulnerable to removal and replacement by malicious users or system intruders.System Administrator
SV-63371r1_rule GEN005300 CCI-000178 HIGH SNMP communities, users, and passphrases must be changed from the default. Whether active or not, default SNMP passwords, users, and passphrases must be changed to maintain security. If the service is running with the default authenticators, then anyone can gather data about the system and the network and use the information to potentially compromise the integrity of the system or network(s).System Administrator
SV-63425r1_rule GEN005320 CCI-000225 MEDIUM The snmpd.conf file must have mode 0600 or less permissive. The snmpd.conf file contains authenticators and must be protected from unauthorized access and modification.System Administrator
SV-63429r1_rule GEN005340 CCI-000225 MEDIUM Management Information Base (MIB) files must have mode 0640 or less permissive. The ability to read the MIB file could impart special knowledge to an intruder or malicious user about the ability to extract compromising information about the system or network.System Administrator
SV-63673r1_rule GEN002480 CCI-000366 MEDIUM Public directories must be the only world-writable directories and world-writable files must be located only in public directories. World-writable files and directories make it easy for a malicious user to place potentially compromising files on the system. The only authorized public directories are those temporary directories supplied with the system or those designed to be temporary file repositories. The setting is normally reserved for directories used by the system and by users for temporary file storage, (e.g., /tmp), and for directories requiring global read/write access.System Administrator
SV-63989r1_rule GEN003800 CCI-000134 LOW Inetd or xinetd logging/tracing must be enabled. Inetd or xinetd logging and tracing allows the system administrators to observe the IP addresses connecting to their machines and what network services are being sought. This provides valuable information when trying to find the source of malicious users and potential malicious users.System Administrator
SV-63139r1_rule GEN008600 CCI-000366 HIGH The system must be configured to only boot from the system boot device. The ability to boot from removable media is the same as being able to boot into single user, or maintenance, mode without a password. This ability could allow a malicious user to boot the system and perform changes with the potential to compromise or damage the system. It could also allow the system to be used for malicious purposes by a malicious anonymous user.System Administrator
SV-62805r1_rule GEN000000-LNX00360 CCI-000366 MEDIUM The X server must have the correct options enabled. Without the correct options enabled, the Xwindows system would be less secure and there would be no screen timeout.System Administrator
SV-62815r1_rule GEN000000-LNX00380 CCI-000366 MEDIUM An X server must have none of the following options enabled: -ac, -core (except for debugging purposes), or -nolock. These options will detract from the security of the Xwindows system.System Administrator
SV-63965r1_rule GEN006240 CCI-000381 MEDIUM The system must not run an Internet Network News (INN) server. INN servers access Usenet newsfeeds and store newsgroup articles. INN servers use the Network News Transfer Protocol (NNTP) to transfer information from the Usenet to the server and from the server to authorized remote hosts. If this function is necessary to support a valid mission requirement, its use must be authorized and approved in the system accreditation package.System AdministratorInformation Assurance Officer
SV-62875r1_rule GEN000000-LNX00400 CCI-000225 MEDIUM The /etc/security/access.conf file must be owned by root. The /etc/security/access.conf file contains entries restricting access from the system console by authorized System Administrators. If the file is owned by a user other than root, it could compromise the system.System Administrator
SV-64123r1_rule GEN006080 CCI-001436 MEDIUM The Samba Web Administration Tool (SWAT) must be restricted to the local host or require SSL. SWAT is a tool used to configure Samba. It modifies Samba configuration, which can impact system security, and must be protected from unauthorized access. SWAT authentication may involve the root password, which must be protected by encryption when traversing the network. Restricting access to the local host allows for the use of SSH TCP forwarding, if configured, or administration by a web browser on the local system.System Administrator
SV-64095r1_rule GEN006100 CCI-000225 MEDIUM The /etc/smb.conf file must be owned by root. The /etc/smb.conf file allows access to other machines on the network and grants permissions to certain users. If it is owned by another user, the file may be maliciously modified and the Samba configuration could be compromised.System Administrator
SV-64087r1_rule GEN006140 CCI-000225 MEDIUM The /etc/smb.conf file must have mode 0644 or less permissive. If the "smb.conf" file has excessive permissions, the file may be maliciously modified and the Samba configuration could be compromised.System Administrator
SV-64077r1_rule GEN006160 CCI-000225 MEDIUM The /etc/smbpasswd file must be owned by root. If the "smbpasswd" file is not owned by root, it may be maliciously accessed or modified, potentially resulting in the compromise of Samba accounts.System Administrator
SV-64055r1_rule GEN006220 CCI-000225 MEDIUM The smb.conf file must use the hosts option to restrict access to Samba. Samba increases the attack surface of the system and must be restricted to communicate only with systems requiring access.System Administrator
SV-63659r1_rule GEN000540 CCI-000198 MEDIUM Users must not be able to change passwords more than once every 24 hours. The ability to change passwords frequently facilitates users reusing the same password. This can result in users effectively never changing their passwords. This would be accomplished by users changing their passwords when required and then immediately changing it to the original value. System Administrator
SV-64449r2_rule GEN001100 CCI-000197 HIGH Root passwords must never be passed over a network in clear text form. If a user accesses the root account (or any account) using an unencrypted connection, the password is passed over the network in clear text form and is subject to interception and misuse. This is true even if recommended procedures are followed by logging on to a named account and using the su command to access root.System Administrator
SV-64455r1_rule GEN001120 CCI-000770 MEDIUM The system must not permit root logins using remote access programs such as ssh. Even though communications are encrypted, an additional layer of security may be gained by extending the policy of not logging directly on as root. In addition, logging in with a user-specific account preserves the audit trail.System Administrator
SV-63247r1_rule GEN002320 CCI-000225 MEDIUM Audio devices must have mode 0660 or less permissive. Audio and video devices that are globally accessible have proven to be another security hazard. There is software that can activate system microphones and video devices connected to user workstations and/or X terminals. Once the microphone has been activated, it is possible to eavesdrop on otherwise private conversations without the victim being aware of it. This action effectively changes the user's microphone into a bugging device.System Administrator
SV-63301r1_rule GEN002340 CCI-000225 MEDIUM Audio devices must be owned by root. Audio and video devices globally accessible have proven to be another security hazard. There is software that can activate system microphones and video devices connected to user workstations and/or X terminals. Once the microphone has been activated, it is possible to eavesdrop on otherwise private conversations without the victim being aware of it. This action effectively changes the user's microphone into a bugging device.System Administrator
SV-62901r1_rule GEN000000-LNX00420 CCI-000225 MEDIUM The /etc/security/access.conf file must have a privileged group owner. Depending on the access restrictions of the /etc/security/access.conf file, if the group owner were not a privileged group, it could endanger system security.System Administrator
SV-62903r1_rule GEN000000-LNX00440 CCI-000225 MEDIUM The /etc/security/access.conf file must have mode 0640 or less permissive. If the access permissions are more permissive than 0640, system security could be compromised.System Administrator
SV-64093r1_rule GEN006120 CCI-000225 MEDIUM The /etc/smb.conf file must be group-owned by root, bin, sys, or system. If the group owner of the "smb.conf" file is not root or a system group, the file may be maliciously modified and the Samba configuration could be compromised.System Administrator
SV-64069r1_rule GEN006180 CCI-000225 MEDIUM The smbpasswd file must be group-owned by root. If the smbpasswd file is not group-owned by root, the smbpasswd file may be maliciously accessed or modified, potentially resulting in the compromise of Samba accounts.System Administrator
SV-64063r1_rule GEN006200 CCI-000225 MEDIUM The smbpasswd file must have mode 0600 or less permissive. If the smbpasswd file has a mode more permissive than 0600, the smbpasswd file may be maliciously accessed or modified, potentially resulting in the compromise of Samba accounts.System Administrator
SV-63341r2_rule GEN002360 CCI-000225 MEDIUM Audio devices must be group-owned by root, sys, bin, or system. Without privileged group owners, audio devices will be vulnerable to being used as eaves-dropping devices by malicious users or intruders to possibly listen to conversations containing sensitive information.System Administrator
SV-64441r1_rule GEN001080 CCI-000366 LOW The root shell must be located in the / file system. To ensure the root shell is available in repair and administrative modes, the root shell must be located in the / file system.System Administrator
SV-63405r1_rule GEN000500 CCI-000057 MEDIUM Graphical desktop environments provided by the system must automatically lock after 15 minutes of inactivity and the system must require users to re-authenticate to unlock the environment. Applications requiring continuous, real-time screen display (i.e., network management products) require the following and need to be documented with the IAO. -The logon session does not have administrator rights. -The display station (i.e., keyboard, monitor, etc.) is located in a controlled access area. If graphical desktop sessions do not lock the session after 15 minutes of inactivity, requiring re-authentication to resume operations, the system or individual data could be compromised by an alert intruder who could exploit the oversight. This requirement applies to graphical desktop environments provided by the system to locally attached displays and input devices as well as to graphical desktop environments provided to remote systems, including thin clients.System Administrator
SV-64321r2_rule GEN000800 CCI-000200 MEDIUM The system must prohibit the reuse of passwords within five iterations. If a user, or root, used the same password continuously or was allowed to change it back shortly after being forced to change it to something else, it would provide a potential intruder with the opportunity to keep guessing at one user's password until it was guessed correctly.System Administrator
SV-63573r3_rule GEN001940 CCI-000225 MEDIUM User start-up files must not execute world-writable programs. If start-up files execute world-writable programs, especially in unprotected directories, they could be maliciously modified to become trojans that destroy user files or otherwise compromise the system at the user, or higher, level. If the system is compromised at the user level, it is much easier to eventually compromise the system at the root and network level.System Administrator
SV-63857r1_rule GEN001660 CCI-000225 MEDIUM All system start-up files must be owned by root. System start-up files not owned by root could lead to system compromise by allowing malicious users or applications to modify them for unauthorized purposes. This could lead to system and network compromise.System Administrator
SV-63859r1_rule GEN001680 CCI-000225 MEDIUM All system start-up files must be group-owned by root, sys, bin, other, or system. If system start-up files do not have a group owner of root or a system group, the files may be modified by malicious users or intruders.System Administrator
SV-63861r1_rule GEN001700 CCI-000225 MEDIUM System start-up files must only execute programs owned by a privileged UID or an application. System start-up files executing programs owned by other than root (or another privileged user) or an application indicating the system may have been compromised.System Administrator
SV-63135r1_rule GEN008620 CCI-000213 MEDIUM System BIOS or system controllers supporting password protection must have administrator accounts/passwords configured, and no others. A system's BIOS or system controller handles the initial startup of a system and its configuration must be protected from unauthorized modification. When the BIOS or system controller supports the creation of user accounts or passwords, such protections must be used and accounts/passwords only assigned to system administrators. Failure to protect BIOS or system controller settings could result in Denial of Service or compromise of the system resulting from unauthorized configuration changes.System Administrator
SV-63121r1_rule GEN008640 CCI-000366 HIGH The system must not use removable media as the boot loader. Malicious users with removable boot media can gain access to a system configured to use removable media as the boot loader.System Administrator
SV-63115r1_rule GEN008660 CCI-000366 HIGH For systems capable of using GRUB, the system must be configured with GRUB as the default boot loader unless another boot loader has been authorized, justified, and documented using site-defined procedures. GRUB is a versatile boot loader used by several platforms that can provide authentication for access to the system or boot loader.System Administrator
SV-63105r1_rule GEN008700 CCI-000213 HIGH The system boot loader must require authentication. If the system's boot loader does not require authentication, users with console access to the system may be able to alter the system boot configuration or boot the system into single user or maintenance mode, which could result in Denial of Service or unauthorized privileged access to the system.System Administrator
SV-63093r1_rule GEN008720 CCI-000225 MEDIUM The systems boot loader configuration file(s) must have mode 0600 or less permissive. File permissions greater than 0600 on boot loader configuration files could allow an unauthorized user to view or modify sensitive information pertaining to system boot instructions.System Administrator
SV-63107r1_rule GEN008680 CCI-001208 HIGH If the system boots from removable media, it must be stored in a safe or similarly secured container. Storing the boot loader on removable media in an insecure location could allow a malicious user to modify the systems boot instructions or boot to an insecure operating system.System AdministratorInformation Assurance Officer
SV-62797r1_rule GEN000000-LNX00320 CCI-000225 HIGH The system must not have special privilege accounts, such as shutdown and halt. If special privilege accounts are compromised, the accounts could provide privileges to execute malicious commands on a system.System Administrator
SV-63195r2_rule GEN000290 CCI-000012 MEDIUM The system must not have unnecessary accounts. Accounts providing no operational purpose provide additional opportunities for system compromise. Unnecessary accounts include user accounts for individuals not requiring access to the system and application accounts for applications not installed on the system.System Administrator
SV-63947r1_rule GEN006260 CCI-000225 MEDIUM The /etc/news/incoming.conf (or equivalent) must have mode 0600 or less permissive. Excessive permissions on the "incoming.conf" file may allow unauthorized modification which could lead to Denial-of-Service to authorized users or provide access to unauthorized users.System Administrator
SV-63921r1_rule GEN006280 CCI-000225 MEDIUM The /etc/news/infeed.conf (or equivalent) must have mode 0600 or less permissive. Excessive permissions on the "" file may allow unauthorized modification which could lead to Denial of Service to authorized users or provide access to unauthorized users.System Administrator
SV-63909r1_rule GEN006300 CCI-000225 MEDIUM The /etc/news/readers.conf (or equivalent) must have mode 0600 or less permissive. Excessive permissions on the readers.conf file may allow unauthorized modification which could lead to Denial of Service to authorized users or provide access to unauthorized users.System Administrator
SV-63899r1_rule GEN006320 CCI-000225 MEDIUM The /etc/news/passwd.nntp file (or equivalent) must have mode 0600 or less permissive. File permissions more permissive than 0600 for "/etc/news/passwd.nntp" may allow access to privileged information by system intruders or malicious users.System Administrator
SV-63829r1_rule GEN006340 CCI-000225 MEDIUM Files in /etc/news must be owned by root or news. If critical system files are not owned by a privileged user, system integrity could be compromised.System Administrator
SV-63817r1_rule GEN006360 CCI-000225 MEDIUM The files in /etc/news must be group-owned by root or news. If critical system files do not have a privileged group-owner, system integrity could be compromised.System Administrator
SV-63543r1_rule GEN005500 CCI-001436 HIGH The SSH daemon must be configured to only use the SSHv2 protocol. SSHv1 is not a DoD-approved protocol and has many well-known vulnerability exploits. Exploits of the SSH daemon could provide immediate root access to the system.System Administrator
SV-64393r1_rule GEN001000 CCI-000070 MEDIUM Remote consoles must be disabled or protected from unauthorized access. The remote console feature provides an additional means of access to the system which could allow unauthorized access if not disabled or properly secured. With virtualization technologies, remote console access is essential as there is no physical console for virtual machines. Remote console access must be protected in the same manner as any other remote privileged access method.System Administrator
SV-63137r1_rule GEN000240 CCI-001492 MEDIUM The system clock must be synchronized to an authoritative DoD time source. To assure the accuracy of the system clock, it must be synchronized with an authoritative time source within DoD. Many system functions, including time-based login and activity restrictions, automated reports, system logs, and audit records depend on an accurate system clock. If there is no confidence in the correctness of the system clock, time-based functions may not operate as intended and records may be of diminished value. Authoritative time sources include authorized time servers within the enclave that synchronize with upstream authoritative sources. Specific requirements for the upstream synchronization of network time protocol (NTP) servers are covered in the Network Other Devices STIG. For systems located on isolated or closed networks, it is not necessary to synchronize with a global authoritative time source. If a global authoritative time source is not available to systems on an isolated network, a local authoritative time source must be established on this network and used by the systems connected to this network. This is necessary to provide the ability to correlate events and allow for the correct operation of time-dependent protocols between systems on the isolated network. If the system is completely isolated (i.e., it has no connections to networks or other systems), time synchronization is not required as no correlation of events between systems will be necessary. If the system is completely isolated, this requirement is not applicable.System Administrator
SV-64225r1_rule GEN003640 CCI-000553 MEDIUM The root file system must employ journaling or another mechanism ensuring file system consistency. File system journaling, or logging, can allow reconstruction of file system data after a system crash, preserving the integrity of data that may have otherwise been lost. Journaling file systems typically do not require consistency checks upon booting after a crash, which can improve system availability. Some file systems employ other mechanisms to ensure consistency also satisfying this requirement.System Administrator
SV-64125r1_rule GEN006060 CCI-001436 MEDIUM The system must not run Samba unless needed. Samba is a tool used for the sharing of files and printers between Windows and UNIX operating systems. It provides access to sensitive files and, therefore, poses a security risk if compromised.System Administrator
SV-62929r1_rule GEN000000-LNX00480 CCI-000225 MEDIUM The /etc/sysctl.conf file must be owned by root. The sysctl.conf file specifies the values for kernel parameters to be set on boot. These settings can affect the system's security.System Administrator
SV-62951r1_rule GEN000000-LNX00500 CCI-000225 MEDIUM The /etc/sysctl.conf file must be group-owned by root. The sysctl.conf file specifies the values for kernel parameters to be set on boot. These settings can affect the system's security.System Administrator
SV-62963r1_rule GEN000000-LNX00520 CCI-000225 MEDIUM The /etc/sysctl.conf file must have mode 0600 or less permissive. The sysctl.conf file specifies the values for kernel parameters to be set on boot. These settings can affect the system's security.System Administrator
SV-62985r1_rule GEN000000-LNX00560 CCI-000225 HIGH The Linux NFS Server must not have the insecure file locking option. Insecure file locking could allow for sensitive data to be viewed or edited by an unauthorized user.System Administrator
SV-62991r1_rule GEN000000-LNX00580 CCI-000366 HIGH The x86 CTRL-ALT-DELETE key sequence must be disabled. Undesirable reboots can occur if the CTRL-ALT-DELETE key sequence is not disabled. Such reboots may cause a loss of data or loss of access to critical information.System Administrator
SV-63003r1_rule GEN000000-LNX00600 CCI-000225 MEDIUM The Linux PAM system must not grant sole access to admin privileges to the first user who logs into the console. If an unauthorized user has been granted privileged access while logged in at the console, the security posture of a system could be greatly compromised. Additionally, such a situation could deny legitimate root access from another terminal.System Administrator
SV-64423r1_rule GEN002860 CCI-000366 MEDIUM Audit logs must be rotated daily. Rotate audit logs daily to preserve audit file system space and to conform to the DoD/DISA requirement. If it is not rotated daily and moved to another location, then there is more of a chance for the compromise of audit data by malicious users.System Administrator
SV-64329r1_rule GEN003200 CCI-000225 MEDIUM The cron.deny file must have mode 0600 or less permissive. If file permissions for cron.deny are more permissive than 0600, sensitive information could be viewed or edited by unauthorized users.System Administrator
SV-64337r2_rule GEN003220 CCI-000225 LOW Cron programs must not set the umask to a value less restrictive than 077. The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 700 or less permissive. Although umask is often represented as a 4-digit octal number, the first digit representing special access modes is typically ignored or required to be 0.trueIf a cron program sets the umask to 000 or does not restrict the world-writable permission, this becomes a CAT I finding.System Administrator
SV-64343r1_rule GEN003240 CCI-000225 MEDIUM The cron.allow file must be owned by root, bin, or sys. If the owner of the cron.allow file is not set to root, bin, or sys, the possibility exists for an unauthorized user to view or to edit sensitive information.System Administrator
SV-64287r1_rule GEN003400 CCI-000225 MEDIUM The at directory must have mode 0755 or less permissive. If the "at" directory has a mode more permissive than 0755, unauthorized users could be allowed to view or to edit files containing sensitive information within the "at" directory. Unauthorized modifications could result in Denial of Service to authorized "at" jobs.System Administrator
SV-64299r2_rule GEN003420 CCI-000225 MEDIUM The at directory must be owned by root, bin, sys, daemon, or cron. If the owner of the "at" directory is not root, bin, or sys, unauthorized users could be allowed to view or edit files containing sensitive information within the directory.System Administrator
SV-64409r1_rule GEN003440 CCI-000225 MEDIUM At jobs must not set the umask to a value less restrictive than 077. The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 700 or less permissive. Although umask is often represented as a 4-digit number, the first digit representing special access modes is typically ignored or required to be 0.trueSystem AdministratorInformation Assurance Officer
SV-64319r1_rule GEN003460 CCI-000225 MEDIUM The at.allow file must be owned by root, bin, or sys. If the owner of the at.allow file is not set to root, bin, or sys, unauthorized users could be allowed to view or edit sensitive information contained within the file.System Administrator
SV-64417r1_rule GEN003480 CCI-000225 MEDIUM The at.deny file must be owned by root, bin, or sys. If the owner of the at.deny file is not set to root, bin, or sys, unauthorized users could be allowed to view or edit sensitive information contained within the file.System Administrator
SV-63487r1_rule GEN003960 CCI-000225 MEDIUM The traceroute command owner must be root. If the traceroute command owner has not been set to root, an unauthorized user could use this command to obtain knowledge of the network topology inside the firewall. This information may allow an attacker to determine trusted routers and other network information potentially leading to system and network compromise.System Administrator
SV-63511r1_rule GEN003980 CCI-000225 MEDIUM The traceroute command must be group-owned by sys, bin, root, or system. If the group owner of the traceroute command has not been set to a system group, unauthorized users could have access to the command and use it to gain information regarding a network's topology inside of the firewall. This information may allow an attacker to determine trusted routers and other network information potentially leading to system and network compromise.System Administrator
SV-63525r1_rule GEN004000 CCI-000225 MEDIUM The traceroute file must have mode 0700 or less permissive. If the mode of the traceroute executable is more permissive than 0700, malicious code could be inserted by an attacker and triggered whenever the traceroute command is executed by authorized users. Additionally, if an unauthorized user is granted executable permissions to the traceroute command, it could be used to gain information about the network topology behind the firewall. This information may allow an attacker to determine trusted routers and other network information potentially leading to system and network compromise.System Administrator
SV-63545r1_rule GEN004220 CCI-000225 HIGH Administrative accounts must not run a web browser, except as needed for local service administration. If a web browser flaw is exploited while running as a privileged user, the entire system could be compromised. Specific exceptions for local service administration should be documented in site-defined policy. These exceptions may include HTTP(S)-based tools used for the administration of the local system, services, or attached devices. Examples of possible exceptions are HP's System Management Homepage (SMH), the CUPS administrative interface, and Sun's StorageTek Common Array Manager (CAM) when these services are running on the local system.System Administrator
SV-63771r1_rule GEN004560 CCI-000366 LOW The SMTP services SMTP greeting must not provide version information. The version of the SMTP service can be used by attackers to plan an attack based on vulnerabilities present in the specific version.System Administrator
SV-62713r2_rule GEN004580 CCI-000366 MEDIUM The system must not use .forward files. The .forward file allows users to automatically forward mail to another system. Use of .forward files could allow the unauthorized forwarding of mail and could potentially create mail loops which could degrade system performance.System Administrator
SV-63109r1_rule GEN005000 CCI-000225 HIGH Anonymous FTP accounts must not have a functional shell. If an anonymous FTP account has been configured to use a functional shell, attackers could gain access to the shell if the account is compromised.System Administrator
SV-63465r1_rule GEN005380 CCI-001208 MEDIUM If the system is a Network Management System (NMS) server, it must only run the NMS and any software required by the NMS. Installing extraneous software on a system designated as a dedicated Network Management System (NMS) server poses a security threat to the system and the network. Should an attacker gain access to the NMS through unauthorized software, the entire network may be susceptible to malicious activity.System Administrator
SV-63473r2_rule GEN005400 CCI-000225 MEDIUM The /etc/syslog.conf file must be owned by root. If the /etc/syslog.conf file is not owned by root, unauthorized users could be allowed to view, edit, or delete important system messages handled by the syslog facility.System Administrator
SV-65303r2_rule GEN005420 CCI-000225 MEDIUM The /etc/syslog.conf file must be group-owned by root, bin, sys, or system. If the group owner of /etc/syslog.conf is not root, bin, or sys, unauthorized users could be permitted to view, edit, or delete important system messages handled by the syslog facility.System Administrator
SV-63507r2_rule GEN005460 CCI-000366 MEDIUM The system must only use remote syslog servers (log hosts) that is justified and documented using site-defined procedures. If a remote log host is in use and it has not been justified and documented with the IAO, sensitive information could be obtained by unauthorized users without the SA's knowledge. A remote log host is any host to which the system is sending syslog messages over a network.trueSystem AdministratorInformation Assurance Officer
SV-64105r1_rule GEN005560 CCI-000366 MEDIUM The system must be configured with a default gateway for IPv4 if the system uses IPv4, unless the system is a router. If a system has no default gateway defined, the system is at increased risk of man-in-the-middle, monitoring, and Denial of Service attacks.System Administrator
SV-64109r2_rule GEN005580 CCI-001208 MEDIUM A system used for routing must not run other network services or applications. Installing extraneous software on a system designated as a dedicated router poses a security threat to the system and the network. Should an attacker gain access to the router through the unauthorized software, the entire network is susceptible to malicious activity.System Administrator
SV-63813r1_rule GEN006380 CCI-001436 HIGH The system must not use UDP for NIS/NIS+. Implementing Network Information Service (NIS) or NIS+ under UDP may make the system more susceptible to a Denial of Service attack and does not provide the same quality of service as TCP.System Administrator
SV-63611r1_rule GEN002020 CCI-000366 MEDIUM All .rhosts, .shosts, or host.equiv files must only contain trusted host-user pairs. If these files are not properly configured, they could allow malicious access by unknown malicious users from untrusted hosts who could compromise the system.System Administrator
SV-63635r1_rule GEN002060 CCI-000225 MEDIUM All .rhosts, .shosts, .netrc, or hosts.equiv files must be accessible by only root or the owner. If these files are accessible by users other than root or the owner, they could be used by a malicious user to set up a system compromise.System Administrator
SV-64361r1_rule GEN003260 CCI-000225 MEDIUM The cron.deny file must be owned by root, bin, or sys. Cron daemon control files restrict the scheduling of automated tasks and must be protected. System Administrator
SV-64011r1_rule GEN003820 CCI-000068 HIGH The rsh daemon must not be running. The rshd process provides a typically unencrypted, host-authenticated remote access service. SSH should be used in place of this service.System AdministratorInformation Assurance Officer
SV-64037r1_rule GEN003840 CCI-001435 HIGH The rexec daemon must not be running. The rexecd process provides a typically unencrypted, host-authenticated remote access service. SSH should be used in place of this service.trueSystem AdministratorInformation Assurance Officer
SV-62907r2_rule GEN004600 CCI-001230 HIGH The SMTP service must be an up-to-date version. The SMTP service version on the system must be current to avoid exposing vulnerabilities present in unpatched versions.System Administrator
SV-62813r1_rule GEN004620 CCI-000366 HIGH The sendmail server must have the debug feature disabled. Debug mode is a feature present in older versions of sendmail which, if not disabled, may allow an attacker to gain access to a system through the sendmail service.System Administrator
SV-62821r1_rule GEN004640 CCI-001230 HIGH The SMTP service must not have a uudecode alias active. A common configuration for older Mail Transfer Agents (MTAs) is to include an alias for the decode user. All mail sent to this user is sent to the uudecode program, which automatically converts and stores files. By sending mail to the decode or the uudecode aliases present on some systems, a remote attacker may be able to create or overwrite files on the remote host. This could possibly be used to gain remote access.System Administrator
SV-62833r1_rule GEN004660 CCI-000366 LOW The SMTP service must not have the EXPN feature active. The SMTP EXPN function allows an attacker to determine if an account exists on a system, providing significant assistance to a brute force attack on user accounts. EXPN may also provide additional information concerning users on the system, such as the full names of account owners.False positives may occur with the SMTP EXPN check. According to RFC821, it is acceptable for a server to respond with a 250 (success) or 550 (failure) when the server supports the EXPN command. For example, some servers return 550 EXPN command not available, meaning the command is not supported and the machine is not vulnerable. However, a result of 550 that is a mailing list, not a user would be a failure code, but not an indication of an error, and the machine would be vulnerable. If a false positive is suspected, check the log file for the response from the server.System Administrator
SV-62859r1_rule GEN004680 CCI-000366 LOW The SMTP service must not have the Verify (VRFY) feature active. The VRFY command allows an attacker to determine if an account exists on a system, providing significant assistance to a brute force attack on user accounts. VRFY may provide additional information about users on the system, such as the full names of account owners.System Administrator
SV-62867r1_rule GEN004700 CCI-000366 LOW The sendmail service must not have the wizard backdoor active. Very old installations of the Sendmail mailing system contained a feature whereby a remote user connecting to the SMTP port can enter the WIZ command and be given an interactive shell with root privileges.System Administrator
SV-63167r1_rule GEN005140 CCI-000225 HIGH Any active TFTP daemon must be authorized and approved in the system accreditation package. TFTP is a file transfer protocol often used by embedded systems to obtain configuration data or software. The service is unencrypted and does not require authentication of requests. Data available using this service may be subject to unauthorized access or interception.System AdministratorInformation Assurance Officer
SV-63353r1_rule GEN005280 CCI-001436 MEDIUM The system must not have the UUCP service active. The UUCP utility is designed to assist in transferring files, executing remote commands, and sending e-mail between UNIX systems over phone lines and direct connections between systems. The UUCP utility is a primitive and arcane system with many security issues. There are alternate data transfer utilities/products that can be configured to more securely transfer data by providing for authentication as well as encryption.System Administrator
SV-63295r1_rule GEN005200 CCI-000225 HIGH X displays must not be exported to the world. Open X displays allow an attacker to capture keystrokes and to execute commands remotely. Many users have their X Server set to "xhost +", permitting access to the X Server by anyone, from anywhere.System Administrator
SV-64051r1_rule GEN003860 CCI-001551 LOW The system must not have the finger service active. The finger service provides information about the system's users to network clients. This information could expose more information for potential used in subsequent attacks.System Administrator
SV-62925r1_rule GEN004840 CCI-000787 MEDIUM If the system is an anonymous FTP server, it must be isolated to the DMZ network. Anonymous FTP is a public data service which is only permitted in a server capacity when located on the DMZ network.System AdministratorInformation Assurance Officer
SV-63095r1_rule GEN000100 CCI-001230 HIGH The operating system must be a supported release. An operating system release is considered "supported" if the vendor continues to provide security patches for the product. With an unsupported release, it will not be possible to resolve security issues discovered in the system software.If an extended support agreement provides security patches for the unsupported product is procured from the vendor, this finding may be downgraded to a CAT III.System Administrator
SV-63133r3_rule GEN000220 CCI-001069 MEDIUM A file integrity tool must be used at least weekly to check for unauthorized file changes, particularly the addition of unauthorized system libraries or binaries, or for unauthorized modification to authorized system libraries or binaries. Changes in system libraries, binaries and other critical system files can indicate compromise or significant system events such as patching needing to be checked by automated processes and the results reviewed by the SA. NOTE: The frequency may be increased to daily, if necessary, in accordance with the contingency plan.System Administrator
SV-63277r1_rule GEN000340 CCI-000366 MEDIUM UIDs reserved for system accounts must not be assigned to non-system accounts. Reserved UIDs are typically used by system software packages. If non-system accounts have UIDs in this range, they may conflict with system software, possibly leading to the user having permissions to modify system files.System Administrator
SV-63903r3_rule GEN000580 CCI-000205 MEDIUM The system must require passwords contain a minimum of 15 characters. The use of longer passwords reduces the ability of attackers to successfully obtain valid passwords using guessing or exhaustive search techniques by increasing the password search space.System Administrator
SV-63973r1_rule GEN000600 CCI-000192 MEDIUM The system must require passwords contain at least one uppercase alphabetic character. To enforce the use of complex passwords, minimum numbers of characters of different classes are mandated. The use of complex passwords reduces the ability of attackers to successfully obtain valid passwords using guessing or exhaustive search techniques. Complexity requirements increase the password search space by requiring users to construct passwords from a larger character set than they may otherwise use.System Administrator
SV-64071r1_rule GEN000620 CCI-000194 MEDIUM The system must require passwords contain at least one numeric character. To enforce the use of complex passwords, minimum numbers of characters of different classes are mandated. The use of complex passwords reduces the ability of attackers to successfully obtain valid passwords using guessing or exhaustive search techniques. Complexity requirements increase the password search space by requiring users to construct passwords from a larger character set than they may otherwise use.System Administrator
SV-64075r1_rule GEN000640 CCI-001619 MEDIUM The system must require passwords contain at least one special character. To enforce the use of complex passwords, minimum numbers of characters of different classes are mandated. The use of complex passwords reduces the ability of attackers to successfully obtain valid passwords using guessing or exhaustive search techniques. Complexity requirements increase the password search space by requiring users to construct passwords from a larger character set than they may otherwise use.System Administrator
SV-64079r1_rule GEN000680 CCI-000366 MEDIUM The system must require passwords contain no more than three consecutive repeating characters. To enforce the use of complex passwords, the number of consecutive repeating characters is limited. Passwords with excessive repeated characters may be more vulnerable to password-guessing attacks.System Administrator
SV-64083r1_rule GEN000700 CCI-000180 MEDIUM User passwords must be changed at least every 60 days. Limiting the lifespan of authenticators limits the period of time an unauthorized user has access to the system while using compromised credentials and reduces the period of time available for password-guessing attacks to run against a single password.System Administrator
SV-64091r1_rule GEN000740 CCI-000199 MEDIUM All non-interactive/automated processing account passwords must be changed at least once per year or be locked. Limiting the lifespan of authenticators limits the period of time an unauthorized user has access to the system while using compromised credentials and reduces the period of time available for password-guessing attacks to run against a single password. Locking the password for non-interactive and automated processing accounts is preferred as it removes the possibility of accessing the account by a password. On some systems, locking the passwords of these accounts may prevent the account from functioning properly. Passwords for non-interactive/automated processing accounts must not be used for direct logon to the system.System Administrator
SV-64397r1_rule GEN001020 CCI-000770 MEDIUM The root account must not be used for direct log in. Direct login with the root account prevents individual user accountability. Acceptable non-routine uses of the root account for direct login are limited to emergency maintenance, the use of single-user mode for maintenance, and situations where individual administrator accounts are not available.System Administrator
SV-64435r2_rule GEN001060 CCI-000126 MEDIUM The system must log successful and unsuccessful access to the root account. If successful and unsuccessful logins and logouts are not monitored or recorded, access attempts cannot be tracked. Without this logging, it may be impossible to track unauthorized access to the system.System Administrator
SV-63865r1_rule GEN001720 CCI-000225 MEDIUM All global initialization files must have mode 0644 or less permissive. Global initialization files are used to configure the user's shell environment upon login. Malicious modification of these files could compromise accounts upon logon.System Administrator
SV-63869r1_rule GEN001740 CCI-000225 MEDIUM All global initialization files must be owned by root. Global initialization files are used to configure the user's shell environment upon login. Malicious modification of these files could compromise accounts upon logon. Failure to give ownership of sensitive files or utilities to root or bin provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.
SV-63871r1_rule GEN001760 CCI-000225 MEDIUM All global initialization files must be group-owned by root, sys, bin, other, system, or the system default. Global initialization files are used to configure the user's shell environment upon login. Malicious modification of these files could compromise accounts upon logon. Failure to give ownership of sensitive files or utilities to root or bin provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.System Administrator
SV-63307r1_rule GEN001820 CCI-000225 MEDIUM All skeleton files and directories (typically in /etc/skel) must be owned by root or bin. If the skeleton files are not protected, unauthorized personnel could change user startup parameters and possibly jeopardize user files. Failure to give ownership of sensitive files or utilities to root or bin provides the designated owner and unauthorized users with the potential to access sensitive information or change the system configuration which could weaken the system's security posture.System Administrator
SV-63327r3_rule GEN001840 CCI-000366 MEDIUM All global initialization files executable search paths must contain only authorized paths. The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search to find executables. If this path includes the current working directory or other relative paths, executables in these directories may be executed instead of system commands. This variable is formatted as a colon-separated list of directories, such as a leading or trailing colon, two consecutive colons, or a single period, this is interpreted as the current working directory. Paths starting with a slash (/) are absolute paths.System Administrator
SV-63541r3_rule GEN001900 CCI-000366 MEDIUM All local initialization files executable search paths must contain only authorized paths. The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search to find executables. If this path includes the current working directory or other relative paths, executables in these directories may be executed instead of system commands. This variable is formatted as a colon-separated list of directories, such as a leading or trailing colon, two consecutive colons, or a single period; this is interpreted as the current working directory. Paths starting with a slash (/) are absolute paths.System Administrator
SV-63581r1_rule GEN001980 CCI-000366 MEDIUM The .rhosts, .shosts, hosts.equiv, shosts.equiv, /etc/passwd, /etc/shadow, and/or /etc/group files must not contain a plus (+) without defining entries for NIS+ netgroups. A plus (+) in system accounts files causes the system to lookup the specified entry using NIS. If the system is not using NIS, no such entries should exist.System Administrator
SV-63621r1_rule GEN002040 CCI-000366 HIGH There must be no .rhosts, .shosts, hosts.equiv, or shosts.equiv files on the system. The .rhosts, .shosts, hosts.equiv, and shosts.equiv files are used to configure host-based authentication for individual users or the system. Host-based authentication is not sufficient for preventing unauthorized access to the system.System AdministratorInformation Assurance Officer
SV-63647r1_rule GEN002100 CCI-000366 MEDIUM The .rhosts file must not be supported in PAM. .rhosts files are used to specify a list of hosts permitted remote access to a particular account without authenticating. The use of such a mechanism defeats strong identification and authentication requirements.System AdministratorInformation Assurance Officer
SV-63797r1_rule GEN002540 CCI-000225 MEDIUM All public directories must be group-owned by root, sys, bin, or an application group. If a public directory has the sticky bit set and is not group-owned by a privileged GID, unauthorized users may be able to modify files created by others. The only authorized public directories are those temporary directories supplied with the system or those designed to be temporary file repositories. The setting is normally reserved for directories used by the system and by users for temporary file storage, (e.g., /tmp), and for directories requiring global read/write access.System Administrator
SV-64401r1_rule GEN003040 CCI-000225 MEDIUM Crontabs must be owned by root or the crontab creator. To protect the integrity of scheduled system jobs and prevent malicious modification to these jobs, crontab files must be secured.System Administrator
SV-64395r1_rule GEN003060 CCI-000225 MEDIUM Default system accounts (with the exception of root) must not be listed in the cron.allow file or must be included in the cron.deny file, if cron.allow does not exist. To centralize the management of privileged account crontabs, of the default system accounts, only root may have a crontab.System Administrator
SV-64311r2_rule GEN003500 CCI-000366 LOW Process core dumps must be disabled unless needed. Process core dumps contain the memory in use by the process when it crashed. Process core dump files can be of significant size and their use can result in file systems filling to capacity, which may result in Denial of Service. Process core dumps can be useful for software debugging. System Administrator
SV-64427r2_rule GEN003520 CCI-000225 LOW The kernel core dump data directory must be owned by root. Kernel core dumps may contain the full contents of system memory at the time of the crash. As the system memory may contain sensitive information, it must be protected accordingly. If the kernel core dump data directory is not owned by root, the core dumps contained in the directory may be subject to unauthorized access.System Administrator
SV-64439r1_rule GEN003540 CCI-000366 MEDIUM The system must implement non-executable program stacks. A common type of exploit is the stack buffer overflow. An application receives, from an attacker, more data than it is prepared for and stores this information on its stack, writing beyond the space reserved for it. This can be designed to cause execution of the data written on the stack. One mechanism to mitigate this vulnerability is for the system to not allow the execution of instructions in sections of memory identified as part of the stack.System Administrator
SV-64451r1_rule GEN003600 CCI-001551 MEDIUM The system must not forward IPv4 source-routed packets. Source-routed packets allow the source of the packet to suggest routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the forwarding of source-routed traffic, such as when IPv4 forwarding is enabled and the system is functioning as a router.System Administrator
SV-64215r1_rule GEN003620 CCI-001208 LOW A separate file system must be used for user home directories (such as /home or an equivalent). The use of separate file systems for different paths can protect the system from failures resulting from a file system becoming full or failing.trueSystem Administrator
SV-64229r2_rule GEN003660 CCI-000126 MEDIUM The system must log informational authentication data. Monitoring and recording successful and unsuccessful logins assists in tracking unauthorized access to the system.System Administrator
SV-64231r1_rule GEN003700 CCI-000305 MEDIUM Inetd and xinetd must be disabled or removed if no network services utilizing them are enabled. Unnecessary services should be disabled to decrease the attack surface of the system.System Administrator
SV-63759r2_rule GEN004540 CCI-000366 MEDIUM The SMTP service HELP command must not be enabled. The HELP command should be disabled to mask version information. The version of the SMTP service software could be used by attackers to target vulnerabilities present in specific software versions.System Administrator
SV-62885r1_rule GEN004800 CCI-000366 MEDIUM Unencrypted FTP must not be used on the system. FTP is typically unencrypted and presents confidentiality and integrity risks. FTP may be protected by encryption in certain cases, such as when used in a Kerberos environment. SFTP and FTPS are encrypted alternatives to FTP.trueSystem Administrator
SV-63113r1_rule GEN005040 CCI-000225 MEDIUM All FTP users must have a default umask of 077. The umask controls the default access mode assigned to newly created files. An umask of 077 limits new files to mode 700 or less permissive. Although umask is stored as a 4-digit number, the first digit representing special access modes is typically ignored or required to be zero (0).System Administrator
SV-63205r1_rule GEN005180 CCI-000225 MEDIUM All .Xauthority files must have mode 0600 or less permissive. .Xauthority files ensure the user is authorized to access specific X Windows host. Excessive permissions may permit unauthorized modification of these files, which could lead to Denial of Service to authorized access or allow unauthorized access to be obtained.System Administrator
SV-63313r1_rule GEN005220 CCI-000297 MEDIUM .Xauthority or X*.hosts (or equivalent) file(s) must be used to restrict access to the X server. If access to the X server is not restricted, a user's X session may be compromised.System Administrator
SV-63329r1_rule GEN005240 CCI-000225 MEDIUM The .Xauthority utility must only permit access to authorized hosts. If unauthorized clients are permitted access to the X server, a user's X session may be compromised.System Administrator
SV-63347r1_rule GEN005260 CCI-001436 MEDIUM X Window System connections not required must be disabled. If unauthorized clients are permitted access to the X server, a user's X session may be compromised.System Administrator
SV-63443r1_rule GEN005360 CCI-000225 MEDIUM The snmpd.conf file must be owned by root. The snmpd.conf file contains authenticators and must be protected from unauthorized access and modification. If the file is not owned by root, it may be subject to access and modification from unauthorized users.System AdministratorECLP-1
SV-63495r1_rule GEN005440 CCI-000366 MEDIUM The system must not be used as a syslog server (loghost) for systems external to the enclave. Syslog messages are typically unencrypted, may contain sensitive information, and are restricted to the enclave.System Administrator
SV-63531r1_rule GEN005480 CCI-000366 MEDIUM The syslog daemon must not accept remote messages unless it is a syslog server documented using site-defined procedures. Unintentionally running a syslog server accepting remote messages puts the system at increased risk. Malicious syslog messages sent to the server could exploit vulnerabilities in the server software itself, could introduce misleading information in to the system's logs, or could fill the system's storage leading to a Denial of Service.System Administrator
SV-64101r1_rule GEN005540 CCI-000366 MEDIUM The SSH daemon must be configured for IP filtering. The SSH daemon must be configured for IP filtering to provide a layered defense against connection attempts from unauthorized addresses.System Administrator
SV-64113r1_rule GEN005600 CCI-000366 MEDIUM IP forwarding for IPv4 must not be enabled, unless the system is a router. If the system is configured for IP forwarding and is not a designated router, it could be used to bypass network security by providing a path for communication not filtered by network devices.System Administrator
SV-64137r1_rule GEN006000 CCI-000366 MEDIUM The system must not have a public Instant Messaging (IM) client installed. Public (IM) systems are not approved for use and may result in the unauthorized distribution of information. IM clients provide a way for a user to send a message to one or more other users in real time. Additional capabilities may include file transfer and support for distributed game playing. Communication between clients and associated directory services are managed through messaging servers. Commercial IM clients include AOL Instant Messenger (AIM), MSN Messenger, and Yahoo! Messenger. IM clients present a security issue when the clients route messages through public servers. The obvious implication is potentially sensitive information could be intercepted or altered in the course of transmission. This same issue is associated with the use of public e-mail servers. In order to reduce the potential for disclosure of sensitive Government information and to ensure the validity of official government information, IM clients connecting to public IM services will not be installed. Clients use to access internal or DoD-controlled IM services are permitted.System Administrator
SV-64127r1_rule GEN006040 CCI-001436 MEDIUM The system must not have any peer-to-peer file-sharing application installed. Peer-to-peer file-sharing software can result in the unintentional exfiltration of information. There are also many legal issues associated with these types of utilities including copyright infringement or other intellectual property issues. The ASD Memo "Use of Peer-to-Peer (P2P) File-Sharing Applications across the DoD" states the following: “P2P file-sharing applications are authorized for use on DOD networks with approval by the appropriate Designated Approval Authority (DAA). Documented requirements, security architecture, configuration management process, and a training program for users are all requirements within the approval process. The unauthorized use of application or services, including P2P applications, is prohibited, and such applications or services must be eliminated.” P2P applications include, but are not limited to, the following: -Napster -Kazaa -ARES -Limewire -IRC Chat Relay -BitTorrentSystem AdministratorDesignated Approving Authority
SV-63785r1_rule GEN006420 CCI-000366 MEDIUM NIS maps must be protected through hard-to-guess domain names. The use of hard-to-guess NIS domain names provides additional protection from unauthorized access to the NIS directory information.System Administrator
SV-63761r1_rule GEN006560 CCI-000366 MEDIUM The system vulnerability assessment tool, host-based intrusion detection tool, and file integrity tool must notify the SA and the IAO of a security breach or a suspected security breach. Timely notifications of potential security compromises minimize the potential damage. Minimally, the system must log these events and the SA and the IAO will receive the notifications during the daily system log review. If feasible, active alerting (such as e-mail or paging) should be employed consistent with the site's established operations management systems and procedures.System AdministratorInformation Assurance Officer
SV-63551r1_rule GEN006620 CCI-000366 MEDIUM The systems access control program must be configured to grant or deny system access to specific hosts. If the system's access control program is not configured with appropriate rules for allowing and denying access to system network resources, services may be accessible to unauthorized hosts.System Administrator
SV-63013r1_rule GEN000000-LNX00620 CCI-000225 MEDIUM The /etc/securetty file must be group-owned by root, sys, or bin. The securetty file contains the list of terminals permitting direct root logins. It must be protected from unauthorized modification.System Administrator
SV-63061r1_rule GEN000000-LNX00640 CCI-000225 MEDIUM The /etc/securetty file must be owned by root. The securetty file contains the list of terminals permitting direct root logins. It must be protected from unauthorized modification.System Administrator
SV-63071r1_rule GEN000000-LNX00660 CCI-000225 MEDIUM The /etc/securetty file must have mode 0600 or less permissive. The securetty file contains the list of terminals permitting direct root logins. It must be protected from unauthorized modification.System Administrator
SV-64029r2_rule GEN003865 CCI-000305 MEDIUM Network analysis tools must not be installed. Network analysis tools allow for the capture of network traffic visible to the system. If the system is being used as a network analysis/troubleshooting system then these tools are allowed if documented.System Administrator
SV-63143r4_rule GEN000241 CCI-000366 MEDIUM The system clock must be synchronized continuously. A synchronized system clock is critical for the enforcement of time-based policies and the correlation of logs and audit records with other systems. Internal system clocks tend to drift and require periodic resynchronization to ensure their accuracy. Software, such as ntpd, can be used to continuously synchronize the system clock with authoritative sources. Alternatively, the system may be synchronized periodically, with a maximum of one day between synchronizations. If the system is completely isolated (i.e., it has no connections to networks or other systems), time synchronization is not required as no correlation of events or operation of time-dependent protocols between systems will be necessary. If the system is completely isolated, this requirement is not applicable.System Administrator
SV-63147r1_rule GEN000242 CCI-000160 MEDIUM The system must use at least two time sources for clock synchronization. A synchronized system clock is critical for the enforcement of time-based policies and the correlation of logs and audit records with other systems. For redundancy, two time sources are required so synchronization continues to function if one source fails. If the system is completely isolated (i.e., it has no connections to networks or other systems), time synchronization is not required as no correlation of events or operation of time-dependent protocols between systems will be necessary. If the system is completely isolated, this requirement is not applicable. Note: For the network time protocol (NTP), the requirement is two servers, but it is recommended to configure at least four distinct time servers which allow NTP to effectively exclude a time source not consistent with the others. The system's local clock must be excluded from the count of time sources.System Administrator
SV-63153r1_rule GEN000244 CCI-000160 LOW The system must use time sources local to the enclave. A synchronized system clock is critical for the enforcement of time-based policies and the correlation of logs and audit records with other systems. The network architecture should provide multiple time servers within an enclave providing local service to the enclave and synchronize with time sources outside of the enclave. If this server is an enclave time server, this requirement is not applicable. If the system is completely isolated (i.e., it has no connections to networks or other systems), time synchronization is not required as no correlation of events or operation of time-dependent protocols between systems will be necessary. If the system is completely isolated, this requirement is not applicable.System Administrator
SV-63161r1_rule GEN000250 CCI-000225 MEDIUM The time synchronization configuration file (such as /etc/ntp.conf) must be owned by root. A synchronized system clock is critical for the enforcement of time-based policies and the correlation of logs and audit records with other systems. If an illicit time source is used for synchronization, the integrity of system logs and the security of the system could be compromised. If the configuration files controlling time synchronization are not owned by a system account, unauthorized modifications could result in the failure of time synchronization.System Administrator
SV-63165r1_rule GEN000251 CCI-000225 MEDIUM The time synchronization configuration file (such as /etc/ntp.conf) must be group-owned by root, bin, or sys. A synchronized system clock is critical for the enforcement of time-based policies and the correlation of logs and audit records with other systems. If an illicit time source is used for synchronization, the integrity of system logs and the security of the system could be compromised. If the configuration files controlling time synchronization are not owned by a system group, unauthorized modifications could result in the failure of time synchronization.System Administrator
SV-63171r1_rule GEN000252 CCI-000225 MEDIUM The time synchronization configuration file (such as /etc/ntp.conf) must have mode 0640 or less permissive. A synchronized system clock is critical for the enforcement of time-based policies and the correlation of logs and audit records with other systems. If an illicit time source is used for synchronization, the integrity of system logs and the security of the system could be compromised. If the configuration files controlling time synchronization are not protected, unauthorized modifications could result in the failure of time synchronization.System Administrator
SV-63177r1_rule GEN000253 CCI-000225 MEDIUM The time synchronization configuration file (such as /etc/ntp.conf) must not have an extended ACL. A synchronized system clock is critical for the enforcement of time-based policies and the correlation of logs and audit records with other systems. If an illicit time source is used for synchronization, the integrity of system logs and the security of the system could be compromised. If the configuration files controlling time synchronization are not protected, unauthorized modifications could result in the failure of time synchronization.System Administrator
SV-63367r1_rule GEN000450 CCI-000054 LOW The system must limit users to 10 simultaneous system logins, or a site-defined number, in accordance with operational requirements. Limiting simultaneous user logins can insulate the system from denial of service problems caused by excessive logins. Automated login processes operating improperly or maliciously may result in an exceptional number of simultaneous login sessions. If the defined value of 10 logins does not meet operational requirements, the site may define the permitted number of simultaneous login sessions based on operational requirements. This limit is for the number of simultaneous login sessions for EACH user account. This is NOT a limit on the total number of simultaneous login sessions on the system.trueSystem Administrator
SV-63373r1_rule GEN000452 CCI-000052 LOW The system must display the date and time of the last successful account login upon login. Providing users with feedback on when account accesses last occurred facilitates user recognition and reporting of unauthorized account use.System Administrator
SV-63633r1_rule GEN000510 CCI-000061 LOW The system must display a publicly-viewable pattern during a graphical desktop environment session lock. To protect the on-screen content of a session, it must be replaced with a publicly-viewable pattern upon session lock. Examples of publicly viewable patterns include screen saver patterns, photographic images, solid colors, or a blank screen, so long as none of those patterns convey sensitive information. This requirement applies to graphical desktop environments provided by the system to locally attached displays and input devices, as well as, to graphical desktop environments provided to remote systems using remote access protocols.System Administrator
SV-63933r2_rule GEN000585 CCI-000205 MEDIUM The system must enforce compliance of the entire password during authentication. Some common password hashing schemes only process the first eight characters of a user's password, which reduces the effective strength of the password.System Administrator
SV-63943r2_rule GEN000590 CCI-000803 MEDIUM The system must use a FIPS 140-2 approved cryptographic hashing algorithm for generating account password hashes. Systems must employ cryptographic hashes for passwords using the SHA-2 family of algorithms or FIPS 140-2 approved successors. The use of unapproved algorithms may result in weak password hashes more vulnerable to compromise.System Administrator
SV-63949r1_rule GEN000595 CCI-000196 MEDIUM The password hashes stored on the system must have been generated using a FIPS 140-2 approved cryptographic hashing algorithm. Systems must employ cryptographic hashes for passwords using the SHA-2 family of algorithms or FIPS 140-2 approved successors. The use of unapproved algorithms may result in weak password hashes more vulnerable to compromise.System Administrator
SV-64065r1_rule GEN000610 CCI-000193 MEDIUM The system must require passwords contain at least one lowercase alphabetic character. To enforce the use of complex passwords, minimum numbers of characters of different classes are mandated. The use of complex passwords reduces the ability of attackers to successfully obtain valid passwords using guessing or exhaustive search techniques. Complexity requirements increase the password search space by requiring users to construct passwords from a larger character set than they may otherwise use.System Administrator
SV-64283r2_rule GEN000750 CCI-000195 MEDIUM The system must require at least eight characters be changed between the old and new passwords during a password change. To ensure password changes are effective in their goals, the system must ensure that old and new passwords have significant differences. Without significant changes, new passwords may be easily guessed based on the value of a previously compromised password.System Administrator
SV-64303r1_rule GEN000790 CCI-000189 MEDIUM The system must prevent the use of dictionary words for passwords. An easily guessable password provides an open door to any external or internal malicious intruder. Many computer compromises occur as the result of account name and password guessing. This is generally done by someone with an automated script that uses repeated logon attempts until the correct account and password pair is guessed. Utilities, such as cracklib, can be used to validate passwords are not dictionary words and meet other criteria during password changes.System Administrator
SV-64327r1_rule GEN000850 CCI-000009 LOW The system must restrict the ability to switch to the root user to members of a defined group. Configuring a supplemental group for users permitted to switch to the root user prevents unauthorized users from accessing the root account, even with knowledge of the root credentials.System Administrator
SV-64363r1_rule GEN000930 CCI-000225 MEDIUM The root accounts home directory must not have an extended ACL. File system extended ACLs provide access to files beyond what is allowed by the UNIX permissions of the files.System Administrator
SV-64377r1_rule GEN000945 CCI-000366 MEDIUM The root accounts library search path must be the system default and must contain only absolute paths. The library search path environment variable(s) contain a list of directories for the dynamic linker to search to find libraries. If this path includes the current working directory or other relative paths, libraries in these directories may be loaded instead of system libraries. This variable is formatted as a colon-separated list of directories. If there is an empty entry, such as a leading or trailing colon or two consecutive colons, this is interpreted as the current working directory. Entries starting with a slash (/) are absolute paths.System Administrator
SV-64383r1_rule GEN000950 CCI-000366 MEDIUM The root accounts list of preloaded libraries must be empty. The library preload list environment variable contains a list of libraries for the dynamic linker to load before loading the libraries required by the binary. If this list contains paths to libraries relative to the current working directory, unintended libraries may be preloaded. This variable is formatted as a space-separated list of libraries. Paths starting with (/) are absolute paths.System Administrator
SV-64465r2_rule GEN001170 CCI-000366 MEDIUM All files and directories must have a valid group-owner. Files without a valid group owner may be unintentionally inherited if a group is assigned the same GID as the GID of the files without a valid group-owner.System Administrator
SV-64473r1_rule GEN001190 CCI-000225 MEDIUM All network services daemon files must not have extended ACLs. Restricting permission on daemons will protect them from unauthorized modification and possible system compromise.System Administrator
SV-64479r1_rule GEN001210 CCI-001499 MEDIUM All system command files must not have extended ACLs. Restricting permissions will protect system command files from unauthorized modification. System command files include files present in directories used by the operating system for storing default system executables and files present in directories included in the system's default executable search paths.System Administrator
SV-64493r1_rule GEN001270 CCI-001314 MEDIUM System log files must not have extended ACLs, except as needed to support authorized software. If the system log files are not protected, unauthorized users could change the logged data, eliminating its forensic value. Authorized software may be given log file access through the use of extended ACLs when needed and configured to provide the least privileges required.trueSystem Administrator
SV-64521r2_rule GEN001290 CCI-000225 LOW All manual page files must not have extended ACLs. If manual pages are compromised, misleading information could be inserted, causing actions to compromise the system.System Administrator
SV-64531r2_rule GEN001310 CCI-001499 MEDIUM All library files must not have extended ACLs. Unauthorized access could destroy the integrity of the library files.System Administrator
SV-64503r1_rule GEN001361 CCI-000225 MEDIUM NIS/NIS+/yp command files must not have extended ACLs. NIS/NIS+/yp files are part of the system's identification and authentication processes and are critical to system security. ACLs on these files could result in unauthorized modification, which could compromise these processes and the system. System Administrator
SV-64497r1_rule GEN001362 CCI-000225 MEDIUM The /etc/resolv.conf file must be owned by root. The resolv.conf (or equivalent) file configures the system's DNS resolver. DNS is used to resolve host names to IP addresses. If DNS configuration is modified maliciously, host name resolution may fail or return incorrect information. DNS may be used by a variety of system security functions such as time synchronization, centralized authentication, and remote system logging. System Administrator
SV-64099r1_rule GEN001363 CCI-000225 MEDIUM The /etc/resolv.conf file must be group-owned by root, bin, or sys. The resolv.conf (or equivalent) file configures the system's DNS resolver. DNS is used to resolve host names to IP addresses. If DNS configuration is modified maliciously, host name resolution may fail or return incorrect information. DNS may be used by a variety of system security functions such as time synchronization, centralized authentication, and remote system logging.System Administrator
SV-64185r1_rule GEN001364 CCI-000225 MEDIUM The /etc/resolv.conf file must have mode 0644 or less permissive. The resolv.conf (or equivalent) file configures the system's DNS resolver. DNS is used to resolve host names to IP addresses. If DNS configuration is modified maliciously, host name resolution may fail or return incorrect information. DNS may be used by a variety of system security functions such as time synchronization, centralized authentication, and remote system logging.System Administrator
SV-64513r1_rule GEN001365 CCI-000225 MEDIUM The /etc/resolv.conf file must not have an extended ACL. The resolv.conf (or equivalent) file configures the system's DNS resolver. DNS is used to resolve host names to IP addresses. If DNS configuration is modified maliciously, host name resolution may fail or return incorrect information. DNS may be used by a variety of system security functions such as time synchronization, centralized authentication, and remote system logging.System Administrator
SV-64519r1_rule GEN001366 CCI-000225 MEDIUM The /etc/hosts file must be owned by root. The /etc/hosts file (or equivalent) configures local host name to IP address mappings that typically take precedence over DNS resolution. If this file is maliciously modified, it could cause the failure or compromise of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging.System Administrator
SV-64523r1_rule GEN001367 CCI-000225 MEDIUM The /etc/hosts file must be group-owned by root, bin, or sys. The /etc/hosts file (or equivalent) configures local host name to IP address mappings that typically take precedence over DNS resolution. If this file is maliciously modified, it could cause the failure or compromise of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging.System Administrator
SV-64527r1_rule GEN001368 CCI-000225 MEDIUM The /etc/hosts file must have mode 0644 or less permissive. The /etc/hosts file (or equivalent) configures local host name to IP address mappings that typically take precedence over DNS resolution. If this file is maliciously modified, it could cause the failure or compromise of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging.System Administrator
SV-64533r1_rule GEN001369 CCI-000225 MEDIUM The /etc/hosts file must not have an extended ACL. The /etc/hosts file (or equivalent) configures local host name to IP address mappings that typically take precedence over DNS resolution. If this file is maliciously modified, it could cause the failure or compromise of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging.System Administrator
SV-64535r1_rule GEN001371 CCI-000225 MEDIUM The /etc/nsswitch.conf file must be owned by root. The nsswitch.conf file (or equivalent) configures the source of a variety of system security information including account, group, and host lookups. Malicious changes could prevent the system from functioning or compromise system security.System Administrator
SV-64539r1_rule GEN001372 CCI-000225 MEDIUM The /etc/nsswitch.conf file must be group-owned by root, bin, or sys. The nsswitch.conf file (or equivalent) configures the source of a variety of system security information including account, group, and host lookups. Malicious changes could prevent the system from functioning or compromise system security.System Administrator
SV-64541r1_rule GEN001373 CCI-000225 MEDIUM The /etc/nsswitch.conf file must have mode 0644 or less permissive. The nsswitch.conf file (or equivalent) configures the source of a variety of system security information including account, group, and host lookups. Malicious changes could prevent the system from functioning or compromise system security.System Administrator
SV-64545r1_rule GEN001374 CCI-000225 MEDIUM The /etc/nsswitch.conf file must not have an extended ACL. The nsswitch.conf file (or equivalent) configures the source of a variety of system security information including account, group, and host lookups. Malicious changes could prevent the system from functioning or compromise system security.System Administrator
SV-64547r1_rule GEN001375 CCI-001182 LOW For systems using DNS resolution, at least two name servers must be configured. To provide availability for name resolution services, multiple redundant name servers are mandated. A failure in name resolution could lead to the failure of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging.System Administrator
SV-64549r1_rule GEN001378 CCI-000225 MEDIUM The /etc/passwd file must be owned by root. The /etc/passwd file contains the list of local system accounts. It is vital to system security and must be protected from unauthorized modification.System Administrator
SV-64553r1_rule GEN001379 CCI-000225 MEDIUM The /etc/passwd file must be group-owned by root, bin, or sys. The /etc/passwd file contains the list of local system accounts. It is vital to system security and must be protected from unauthorized modification.System Administrator
SV-64559r1_rule GEN001390 CCI-000225 MEDIUM The /etc/passwd file must not have an extended ACL. File system ACLs can provide access to files beyond what is allowed by the mode numbers of the files. The /etc/passwd file contains the list of local system accounts. It is vital to system security and must be protected from unauthorized modification.System Administrator
SV-64561r1_rule GEN001391 CCI-000225 MEDIUM The /etc/group file must be owned by root. The /etc/group file is critical to system security and must be owned by a privileged user. The group file contains a list of system groups and associated information.System Administrator
SV-64563r1_rule GEN001392 CCI-000225 MEDIUM The /etc/group file must be group-owned by root, bin, or sys. The /etc/group file is critical to system security and must be protected from unauthorized modification. The group file contains a list of system groups and associated information.System Administrator
SV-64565r1_rule GEN001393 CCI-000225 MEDIUM The /etc/group file must have mode 0644 or less permissive. The /etc/group file is critical to system security and must be protected from unauthorized modification. The group file contains a list of system groups and associated information.System Administrator
SV-64567r1_rule GEN001394 CCI-000225 MEDIUM The /etc/group file must not have an extended ACL. The /etc/group file is critical to system security and must be protected from unauthorized modification. The group file contains a list of system groups and associated information.System Administrator
SV-64571r1_rule GEN001410 CCI-000225 MEDIUM The /etc/shadow file (or equivalent) must be group-owned by root, bin, or sys. The /etc/shadow file contains the list of local system accounts. It is vital to system security and must be protected from unauthorized modification. The file also contains password hashes which must not be accessible to users other than root.System Administrator
SV-64575r1_rule GEN001430 CCI-000225 MEDIUM The /etc/shadow file must not have an extended ACL. The /etc/shadow file contains the list of local system accounts. It is vital to system security and must be protected from unauthorized modification. The file also contains password hashes which must not be accessible to users other than root.System Administrator
SV-62667r1_rule GEN000000-LNX001431 CCI-000225 MEDIUM The /etc/gshadow file must be owned by root. The /etc/gshadow file is critical to system security and must be owned by a privileged user. The /etc/gshadow file contains a list of system groups and hashes for group passwords.System Administrator
SV-62681r1_rule GEN000000-LNX001432 CCI-000225 MEDIUM The /etc/gshadow file must be group-owned by root. The /etc/gshadow file is critical to system security and must be protected from unauthorized modification. The /etc/gshadow file contains a list of system groups and hashes for group passwords.System Administrator
SV-62697r1_rule GEN000000-LNX001433 CCI-000225 MEDIUM The /etc/gshadow file must have mode 0400. The /etc/gshadow file is critical to system security and must be protected from unauthorized modification. The /etc/gshadow file contains a list of system groups and hashes for group passwords.System Administrator
SV-62711r1_rule GEN000000-LNX001434 CCI-000225 MEDIUM The /etc/gshadow file must not have an extended ACL. The /etc/gshadow file is critical to system security and must be protected from unauthorized modification. The /etc/gshadow file contains a list of system groups and hashes for group passwords.System Administrator
SV-64581r1_rule GEN001470 CCI-000201 MEDIUM The /etc/passwd file must not contain password hashes. If password hashes are readable by non-administrators, the passwords are subject to attack through lookup tables or cryptographic weaknesses in the hashes.System Administrator
SV-64583r1_rule GEN001475 CCI-000225 MEDIUM The /etc/group file must not contain any group password hashes. Group passwords are typically shared and should not be used. Additionally, if password hashes are readable by non-administrators, the passwords are subject to attack through lookup tables or cryptographic weaknesses in the hashes.System Administrator
SV-62767r1_rule GEN000000-LNX001476 CCI-000366 MEDIUM The /etc/gshadow file must not contain any group password hashes. Group passwords are typically shared and should not be used.System Administrator
SV-64587r1_rule GEN001490 CCI-000225 LOW User home directories must not have extended ACLs. Excessive permissions on home directories allow unauthorized access to user files.System Administrator
SV-63833r1_rule GEN001550 CCI-000225 MEDIUM All files and directories contained in user home directories must be group-owned by a group of which the home directorys owner is a member. If a user's files are group-owned by a group of which the user is not a member, unintended users may be able to access them.System Administrator
SV-63839r1_rule GEN001570 CCI-000225 MEDIUM All files and directories contained in user home directories must not have extended ACLs. Excessive permissions allow unauthorized access to user files.System Administrator
SV-63847r1_rule GEN001590 CCI-000225 MEDIUM All run control scripts must have no extended ACLs. If the startup files are writable by other users, they could modify the startup files to insert malicious commands into the startup files.System Administrator
SV-63851r3_rule GEN001605 CCI-000366 MEDIUM Run control scripts library search paths must contain only authorized paths. The library search path environment variable(s) contain a list of directories for the dynamic linker to search to find libraries. If this path includes the current working directory or other relative paths, libraries in these directories may be loaded instead of system libraries. This variable is formatted as a colon-separated list of directories. If there is an empty entry, such as a leading or trailing colon, two consecutive colons, or a single period, this is interpreted as the current working directory. Paths starting with a slash (/) are absolute paths.System Administrator
SV-63853r3_rule GEN001610 CCI-000366 MEDIUM Run control scripts lists of preloaded libraries must contain only authorized paths. The library preload list environment variable contains a list of libraries for the dynamic linker to load before loading the libraries required by the binary. If an entry begins with a character other than a slash (/), or has If this list contains paths to libraries to the current working directory that have not been authorized, unintended libraries may be preloaded. This variable is formatted as a space-separated list of libraries. Paths starting with a slash (/) are absolute paths.System Administrator
SV-63867r1_rule GEN001730 CCI-000225 MEDIUM All global initialization files must not have extended ACLs. Global initialization files are used to configure the user's shell environment upon login. Malicious modification of these files could compromise accounts upon logon.System Administrator
SV-63881r1_rule GEN001810 CCI-000225 MEDIUM Skeleton files must not have extended ACLs. If the skeleton files are not protected, unauthorized personnel could change user startup parameters and possibly jeopardize user files.System Administrator
SV-63323r1_rule GEN001830 CCI-000225 MEDIUM All skeleton files (typically in /etc/skel) must be group-owned by root, bin, sys, system, or other. If the skeleton files are not protected, unauthorized personnel could change user startup parameters and possibly jeopardize user files.System Administrator
SV-63331r3_rule GEN001845 CCI-000366 MEDIUM Global initialization files library search paths must contain only authorized paths. The library search path environment variable(s) contain a list of directories for the dynamic linker to search to find libraries. If this path includes the current working directory or other relative paths, libraries in these directories may be loaded instead of system libraries. This variable is formatted as a colon-separated list of directories, such as a leading or trailing colon, two consecutive colons, or a single period; this is interpreted as the current working directory. Paths starting with a slash (/) are absolute paths.System Administrator
SV-63335r3_rule GEN001850 CCI-000366 MEDIUM Global initialization files lists of preloaded libraries must contain only authorized paths. The library preload list environment variable contains a list of libraries for the dynamic linker to load before loading the libraries required by the binary. If an entry begins with a character other than a slash (/), or has If this list contains paths to libraries to the current working directory that have not been authorized, unintended libraries may be preloaded. This variable is formatted as a space-separated list of libraries. Paths starting with a slash (/) are absolute paths.System Administrator
SV-63343r1_rule GEN001870 CCI-000225 MEDIUM Local initialization files must be group-owned by the users primary group or root. Local initialization files are used to configure the user's shell environment upon login. Malicious modification of these files could compromise accounts upon logon.System Administrator
SV-63537r1_rule GEN001890 CCI-000225 MEDIUM Local initialization files must not have extended ACLs. Local initialization files are used to configure the user's shell environment upon login. Malicious modification of these files could compromise accounts upon logon.System Administrator
SV-63549r3_rule GEN001901 CCI-000366 MEDIUM Local initialization files library search paths must contain only authorized paths. The library search path environment variable(s) contain a list of directories for the dynamic linker to search to find libraries. If this path includes the current working directory or other relative paths, libraries in these directories may be loaded instead of system libraries. This variable is formatted as a colon-separated list of directories, such as a leading or trailing colon, two consecutive colons, or a single period this is interpreted as the current working directory. Paths starting with a slash (/) are absolute paths.System Administrator
SV-63569r3_rule GEN001902 CCI-000366 MEDIUM Local initialization files lists of preloaded libraries must contain only authorized paths. The library preload list environment variable contains a list of libraries for the dynamic linker to load before loading the libraries required by the binary. If an entry begins with a character other than a slash (/), or has If this list contains paths to libraries to the current working directory that have not been authorized, unintended libraries may be preloaded. This variable is formatted as a space-separated list of libraries. Paths starting with a slash (/) are absolute paths.System Administrator
SV-63697r1_rule GEN002210 CCI-000225 MEDIUM All shell files must be group-owned by root, bin, sys, or system. If shell files are group-owned by users other than root or a system group, they could be modified by intruders or malicious users to perform unauthorized actions.System Administrator
SV-63017r1_rule GEN002230 CCI-000225 MEDIUM All shell files must not have extended ACLs. Shells with world/group write permissions give the ability to maliciously modify the shell to obtain unauthorized access.System Administrator
SV-63293r1_rule GEN002330 CCI-000225 MEDIUM Audio devices must not have extended ACLs. File system ACLs can provide access to files beyond what is allowed by the mode numbers of the files.System Administrator
SV-63455r1_rule GEN002430 CCI-000366 MEDIUM Removable media, remote file systems, and any file system not containing approved device files must be mounted with the nodev option. The "nodev" (or equivalent) mount option causes the system to not handle device files as system devices. This option must be used for mounting any file system not containing approved device files. Device files can provide direct access to system hardware and can compromise security if not protected.System Administrator
SV-63885r1_rule GEN002710 CCI-000163 MEDIUM All system audit files must not have extended ACLs. If a user can write to the audit logs, then audit trails can be modified or destroyed and system intrusion may not be detected.System Administrator
SV-63959r1_rule GEN002715 CCI-001493 LOW System audit tool executables must be owned by root. To prevent unauthorized access or manipulation of system audit logs, the tools for manipulating those logs must be protected.System Administrator
SV-63975r1_rule GEN002716 CCI-001493 LOW System audit tool executables must be group-owned by root, bin, sys, or system. To prevent unauthorized access or manipulation of system audit logs, the tools for manipulating those logs must be protected.System Administrator
SV-64003r1_rule GEN002717 CCI-001493 LOW System audit tool executables must have mode 0750 or less permissive. To prevent unauthorized access or manipulation of system audit logs, the tools for manipulating those logs must be protected.System Administrator
SV-64097r1_rule GEN002718 CCI-001493 LOW System audit tool executables must not have extended ACLs. To prevent unauthorized access or manipulation of system audit logs, the tools for manipulating those logs must be protected.System Administrator
SV-64223r1_rule GEN002719 CCI-000139 LOW The audit system must alert the SA in the event of an audit processing failure. An accurate and current audit trail is essential for maintaining a record of system activity. If the system fails, the SA must be notified and must take prompt action to correct the problem. Minimally, the system must log this event and the SA will receive this notification during the daily system log review. If feasible, active alerting (such as e-mail or paging) should be employed consistent with the site's established operations management systems and procedures.System Administrator
SV-64261r1_rule GEN002730 CCI-000143 MEDIUM The audit system must alert the SA when the audit storage volume approaches its capacity. An accurate and current audit trail is essential for maintaining a record of system activity. If the system fails, the SA must be notified and must take prompt action to correct the problem. Minimally, the system must log this event and the SA will receive this notification during the daily system log review. If feasible, active alerting (such as e-mail or paging) should be employed consistent with the site's established operations management systems and procedures.System Administrator
SV-64267r1_rule GEN002750 CCI-000018 LOW The audit system must be configured to audit account creation. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises, and damages incurred during a system compromise.System Administrator
SV-64269r1_rule GEN002751 CCI-001403 LOW The audit system must be configured to audit account modification. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64271r1_rule GEN002752 CCI-001404 LOW The audit system must be configured to audit account disabling. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64273r1_rule GEN002753 CCI-001405 LOW The audit system must be configured to audit account termination. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64505r1_rule GEN002825 CCI-000126 MEDIUM The audit system must be configured to audit the loading and unloading of dynamic kernel modules. Actions concerning dynamic kernel modules must be recorded as they are substantial events. Dynamic kernel modules can increase the attack surface of a system. A malicious kernel module can be used to substantially alter the functioning of a system, often with the purpose of hiding a compromise from the SA.System Administrator
SV-64407r1_rule GEN002990 CCI-000225 MEDIUM The cron.allow file must not have an extended ACL. A readable and/or writeable cron.allow file by other users than root could allow potential intruders and malicious users to use the file contents to help discern information, such as who is allowed to execute cron programs, which could be harmful to overall system and network security.System Administrator
SV-64399r1_rule GEN003050 CCI-000225 MEDIUM Crontab files must be group-owned by root, cron, or the crontab creators primary group. To protect the integrity of scheduled system jobs and prevent malicious modification to these jobs, crontab files must be secured.System Administrator
SV-64381r1_rule GEN003090 CCI-000225 MEDIUM Crontab files must not have extended ACLs. To protect the integrity of scheduled system jobs and to prevent malicious modification to these jobs, crontab files must be secured. ACLs on crontab files may provide unauthorized access to the files.System Administrator
SV-64367r1_rule GEN003110 CCI-000225 MEDIUM Cron and crontab directories must not have extended ACLs. To protect the integrity of scheduled system jobs and to prevent malicious modification to these jobs, crontab files must be secured. ACLs on cron and crontab directories may provide unauthorized access to these directories. Unauthorized modifications to these directories or their contents may result in the addition of unauthorized cron jobs or deny service to authorized cron jobs.System Administrator
SV-64325r2_rule GEN003190 CCI-000225 MEDIUM The cron log files must not have extended ACLs. Cron logs contain reports of scheduled system activities and must be protected from unauthorized access or manipulation.System Administrator
SV-64331r1_rule GEN003210 CCI-000225 MEDIUM The cron.deny file must not have an extended ACL. If there are excessive file permissions for the cron.deny file, sensitive information could be viewed or edited by unauthorized users.System Administrator
SV-64347r1_rule GEN003245 CCI-000225 MEDIUM The at.allow file must not have an extended ACL. File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. Unauthorized modification of the at.allow file could result in Denial of Service to authorized "at" users and the granting of the ability to run "at" jobs to unauthorized users.System Administrator
SV-64351r1_rule GEN003250 CCI-000225 MEDIUM The cron.allow file must be group-owned by root, bin, sys, or cron. If the group of the cron.allow is not set to root, bin, sys, or cron, the possibility exists for an unauthorized user to view or edit the list of users permitted to use cron. Unauthorized modification of this file could cause Denial of Service to authorized cron users or provide unauthorized users with the ability to run cron jobs.System Administrator
SV-64355r1_rule GEN003252 CCI-000225 MEDIUM The at.deny file must have mode 0600 or less permissive. The "at" daemon control files restrict access to scheduled job manipulation and must be protected. Unauthorized modification of the at.deny file could result in Denial of Service to authorized "at" users or provide unauthorized users with the ability to run "at" jobs.System Administrator
SV-64357r1_rule GEN003255 CCI-000225 MEDIUM The at.deny file must not have an extended ACL. The "at" daemon control files restrict access to scheduled job manipulation and must be protected. Unauthorized modification of the at.deny file could result in Denial of Service to authorized "at" users or provide unauthorized users with the ability to run "at" jobs.System Administrator
SV-64365r1_rule GEN003270 CCI-000225 MEDIUM The cron.deny file must be group-owned by root, bin, or sys. Cron daemon control files restrict the scheduling of automated tasks and must be protected. Unauthorized modification of the cron.deny file could result in Denial of Service to authorized cron users or could provide unauthorized users with the ability to run cron jobs.System Administrator
SV-64289r1_rule GEN003410 CCI-000225 MEDIUM The at directory must not have an extended ACL. If the "at" directory has an extended ACL, unauthorized users could be allowed to view or to edit files containing sensitive information within the "at" directory. Unauthorized modifications could result in Denial of Service to authorized "at" jobs.System Administrator
SV-64297r1_rule GEN003430 CCI-000225 MEDIUM The at directory must be group-owned by root, bin, sys, or cron. If the group of the "at" directory is not root, bin, sys, or cron, unauthorized users could be allowed to view or edit files containing sensitive information within the directory.System Administrator
SV-64413r1_rule GEN003470 CCI-000225 MEDIUM The at.allow file must be group-owned by root, bin, sys, or cron. If the group owner of the at.allow file is not set to root, bin, sys, or cron, unauthorized users could be allowed to view or edit the list of users permitted to run "at" jobs. Unauthorized modification could result in Denial of Service to authorized "at" users or provide unauthorized users with the ability to run "at" jobs.System Administrator
SV-64309r1_rule GEN003490 CCI-000225 MEDIUM The at.deny file must be group-owned by root, bin, sys, or cron. If the group owner of the at.deny file is not set to root, bin, sys, or cron, unauthorized users could be allowed to view or edit sensitive information contained within the file. Unauthorized modification could result in Denial of Service to authorized "at" users or provide unauthorized users with the ability to run "at" jobs.System Administrator
SV-64421r1_rule GEN003510 CCI-000366 MEDIUM Kernel core dumps must be disabled unless needed. Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps may consume a considerable amount of disk space and may result in Denial of Service by exhausting the available space on the target file system. The kernel core dump process may increase the amount of time a system is unavailable due to a crash. Kernel core dumps can be useful for kernel debugging.System Administrator
SV-64431r1_rule GEN003521 CCI-000225 LOW The kernel core dump data directory must be group-owned by root, bin, sys, or system. Kernel core dumps may contain the full contents of system memory at the time of the crash. As the system memory may contain sensitive information, it must be protected accordingly. If the kernel core dump data directory is not group-owned by a system group, the core dumps contained in the directory may be subject to unauthorized access.System Administrator
SV-64433r2_rule GEN003522 CCI-000225 LOW The kernel core dump data directory must have mode 0700 or less permissive. Kernel core dumps may contain the full contents of system memory at the time of the crash. As the system memory may contain sensitive information, it must be protected accordingly. If the mode of the kernel core dump data directory is more permissive than 0700, unauthorized users may be able to view or to modify kernel core dump data files.System Administrator
SV-64437r2_rule GEN003523 CCI-000225 LOW The kernel core dump data directory must not have an extended ACL. Kernel core dumps may contain the full contents of system memory at the time of the crash. As the system memory may contain sensitive information, it must be protected accordingly. If there is an extended ACL for the kernel core dump data directory, unauthorized users may be able to view or to modify kernel core dump data files.System Administrator
SV-64443r1_rule GEN003581 CCI-000225 MEDIUM Network interfaces must not be configured to allow user control. Configuration of network interfaces should be limited to privileged users. Manipulation of network interfaces may result in a Denial of Service or bypass of network security mechanisms.System Administrator
SV-64445r2_rule GEN003602 CCI-001551 LOW The system must not process Internet Control Message Protocol (ICMP) timestamp requests. The processing of (ICMP) timestamp requests increases the attack surface of the system.System Administrator
SV-64459r1_rule GEN003603 CCI-001551 MEDIUM The system must not respond to Internet Control Message Protocol v4 (ICMPv4) echoes sent to a broadcast address. Responding to broadcast (ICMP) echoes facilitates network mapping and provides a vector for amplification attacks.System Administrator
SV-64195r2_rule GEN003604 CCI-001551 MEDIUM The system must not respond to Internet Control Message Protocol (ICMP) timestamp requests sent to a broadcast address. The processing of (ICMP) timestamp requests increases the attack surface of the system. Responding to broadcast ICMP timestamp requests facilitates network mapping and provides a vector for amplification attacks.GEN000000-FWThe system's firewall default-deny policy mitigates the risk from this vulnerability.System Administrator
SV-64197r1_rule GEN003607 CCI-001551 MEDIUM The system must not accept source-routed IPv4 packets. Source-routed packets allow the source of the packet to suggest routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the handling of source-routed traffic destined to the system itself, not to traffic forwarded by the system to another system, such as when IPv4 forwarding is enabled and the system is functioning as a router.System Administrator
SV-64201r1_rule GEN003608 CCI-001551 MEDIUM Proxy Address Resolution Protocol (Proxy ARP) must not be enabled on the system. Proxy ARP allows a system to respond to ARP requests on one interface on behalf of hosts connected to another interface. If this function is enabled when not required, addressing information may be leaked between the attached network segments.System Administrator
SV-64203r1_rule GEN003609 CCI-001503 MEDIUM The system must ignore IPv4 Internet Control Message Protocol (ICMP) redirect messages. ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages modify the host's route table and are unauthenticated. An illicit ICMP redirect message could result in a man-in-the-middle attack.System Administrator
SV-64205r1_rule GEN003610 CCI-001551 MEDIUM The system must not send IPv4 Internet Control Message Protocol (ICMP) redirects. ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages contain information from the system's route table possibly revealing portions of the network topology.System Administrator
SV-64207r1_rule GEN003611 CCI-000126 LOW The system must log martian packets. Martian packets are packets containing addresses known by the system to be invalid. Logging these messages allows the SA to identify misconfigurations or attacks in progress.System Administrator
SV-64209r1_rule GEN003612 CCI-001092 MEDIUM The system must be configured to use TCP syncookies when experiencing a TCP SYN flood. A TCP SYN flood attack can cause Denial of Service by filling a system's TCP connection table with connections in the SYN_RCVD state. Syncookies are a mechanism used to only track a connection when a subsequent ACK is received, verifying the initiator is attempting a valid connection and is not a flood source. This technique does not operate in a fully standards-compliant manner, but is only activated when a flood condition is detected, and allows defense of the system while continuing to service valid requests.System Administrator
SV-64213r1_rule GEN003619 CCI-001551 MEDIUM The system must not be configured for network bridging. Some systems have the ability to bridge or switch frames (link-layer forwarding) between multiple interfaces. This can be useful in a variety of situations but, if enabled when not needed, has the potential to bypass network partitioning and security.System Administrator
SV-64227r1_rule GEN003650 CCI-000553 LOW All local file systems must employ journaling or another mechanism ensuring file system consistency. File system journaling, or logging, can allow reconstruction of file system data after a system crash preserving the integrity of data that may have otherwise been lost. Journaling file systems typically do not require consistency checks upon booting after a crash, which can improve system availability. Some file systems employ other mechanisms to ensure consistency also satisfying this requirement.System Administrator
SV-64235r1_rule GEN003730 CCI-000225 MEDIUM The inetd.conf file, xinetd.conf file, and the xinetd.d directory must be group-owned by root, bin, sys, or system. Failure to give ownership of sensitive files or utilities to system groups may provide unauthorized users with the potential to access sensitive information or change the system configuration possibly weakening the system's security posture.System Administrator
SV-64241r1_rule GEN003745 CCI-000225 MEDIUM The inetd.conf and xinetd.conf files must not have extended ACLs. The Internet service daemon configuration files must be protected as malicious modification could cause Denial of Service or increase the attack surface of the system.System Administrator
SV-64243r1_rule GEN003750 CCI-000225 MEDIUM The xinetd.d directory must have mode 0755 or less permissive. The Internet service daemon configuration files must be protected as malicious modification could cause Denial of Service or increase the attack surface of the system.System Administrator
SV-63971r1_rule GEN003755 CCI-000225 MEDIUM The xinetd.d directory must not have an extended ACL. The Internet service daemon configuration files must be protected as malicious modification could cause Denial of Service or increase the attack surface of the system.System Administrator
SV-63979r2_rule GEN003770 CCI-000225 MEDIUM The services file must be group-owned by root or bin. Failure to give ownership of system configuration files to root or a system group provides the designated owner and unauthorized users with the potential to change the system configuration possibly weakening the system's security posture.System Administrator
SV-63985r1_rule GEN003790 CCI-000225 MEDIUM The services file must not have an extended ACL. The services file is critical to the proper operation of network services and must be protected from unauthorized modification. If the services file has an extended ACL, it may be possible for unauthorized users to modify the file. Unauthorized modification could result in the failure of network services.System Administrator
SV-63995r1_rule GEN003810 CCI-001336 MEDIUM The portmap or rpcbind service must not be running unless needed. The portmap and rpcbind services increase the attack surface of the system and should only be used when needed. The portmap or rpcbind services are used by a variety of services using Remote Procedure Calls (RPCs).System Administrator
SV-63997r1_rule GEN003815 CCI-000305 MEDIUM The portmap or rpcbind service must not be installed unless needed. The portmap and rpcbind services increase the attack surface of the system and should only be used when needed. The portmap or rpcbind services are used by a variety of services using Remote Procedure Calls (RPCs).System Administrator
SV-64009r1_rule GEN003825 CCI-000305 MEDIUM The rshd service must not be installed. The rshd process provides a typically unencrypted, host-authenticated remote access service. SSH should be used in place of this service.System Administrator
SV-64019r1_rule GEN003830 CCI-000068 MEDIUM The rlogind service must not be running. The rlogind process provides a typically unencrypted, host-authenticated remote access service. SSH should be used in place of this service.System Administrator
SV-64015r1_rule GEN003835 CCI-000305 MEDIUM The rlogind service must not be installed. The rlogind process provides a typically unencrypted, host-authenticated remote access service. SSH should be used in place of this service.System Administrator
SV-64039r1_rule GEN003845 CCI-000305 MEDIUM The rexecd service must not be installed. The rexecd process provides a typically unencrypted, host-authenticated remote access service. SSH should be used in place of this service.System Administrator
SV-64117r2_rule GEN003930 CCI-000225 MEDIUM The hosts.lpd (or equivalent) file must be group-owned by lp. Failure to give group-ownership of the hosts.lpd file to root, bin, sys, or system provides the members of the owning group and possible unauthorized users, with the potential to modify the hosts.lpd file. Unauthorized modifications could disrupt access to local printers from authorized remote hosts or permit unauthorized remote access to local printers.System Administrator
SV-63475r1_rule GEN003950 CCI-000225 MEDIUM The hosts.lpd (or equivalent) file must not have an extended ACL. Excessive permissions on the hosts.lpd (or equivalent) file may permit unauthorized modification. Unauthorized modifications could disrupt access to local printers from authorized remote hosts or permit unauthorized remote access to local printers.System Administrator
SV-63539r1_rule GEN004010 CCI-000225 MEDIUM The traceroute file must not have an extended ACL. If an extended ACL exists on the traceroute executable file, it may provide unauthorized users with access to the file. Malicious code could be inserted by an attacker and triggered whenever the traceroute command is executed by authorized users. Additionally, if an unauthorized user is granted executable permissions to the traceroute command, it could be used to gain information about the network topology behind the firewall. This information may allow an attacker to determine trusted routers and other network information potentially leading to system and network compromise.System Administrator
SV-63613r1_rule GEN004370 CCI-000225 MEDIUM The aliases file must be group-owned by root, sys, bin, or system. If the alias file is not group-owned by root or a system group, an unauthorized user may modify the file adding aliases to run malicious code or redirect e-mail.System Administrator
SV-63643r1_rule GEN004390 CCI-000225 MEDIUM The alias file must not have an extended ACL. Excessive permissions on the aliases file may permit unauthorized modification. If the alias file is modified by an unauthorized user, they may modify the file to run malicious code or redirect e-mail.System Administrator
SV-63719r1_rule GEN004410 CCI-000225 MEDIUM Files executed through a mail aliases file must be group-owned by root, bin, sys, or system, and must reside within a directory group-owned by root, bin, sys, or system. If a file executed through a mail aliases file is not group-owned by root or a system group, it may be subject to unauthorized modification. Unauthorized modification of files executed through aliases may allow unauthorized users to attain root privileges.System Administrator
SV-63745r1_rule GEN004430 CCI-000225 MEDIUM Files executed through a mail aliases file must not have extended ACLs. Excessive permissions on files executed through a mail aliases file could result in modification by an unauthorized user, execution of malicious code, and/or system compromise.System Administrator
SV-63755r3_rule GEN004510 CCI-000225 MEDIUM The SMTP service log file must not have an extended ACL. If the SMTP service log file has an extended ACL, unauthorized users may be allowed to access or to modify the log file.System Administrator
SV-63015r1_rule GEN004930 CCI-000225 MEDIUM The ftpusers file must be group-owned by root, bin, sys, or system. If the ftpusers file is not group-owned by root or a system group, an unauthorized user may modify the file to allow unauthorized accounts to use FTP.System Administrator
SV-63083r1_rule GEN004950 CCI-000225 MEDIUM The ftpusers file must not have an extended ACL. Excessive permissions on the ftpusers file could permit unauthorized modification. Unauthorized modification could result in Denial of Service to authorized FTP users or permit unauthorized users to access the FTP service.System Administrator
SV-63285r1_rule GEN005190 CCI-000225 MEDIUM The .Xauthority files must not have extended ACLs. .Xauthority files ensure the user is authorized to access specific X Windows host. Extended ACLs may permit unauthorized modification of these files, which could lead to Denial of Service to authorized access or allow unauthorized access to be obtained.System Administrator
SV-63397r1_rule GEN005305 CCI-001435 MEDIUM The SNMP service must use only SNMPv3 or its successors. SNMP Versions 1 and 2 are not considered secure. Without the strong authentication and privacy provided by the SNMP Version 3 User-based Security Model (USM), an attacker or other unauthorized users may gain access to detailed system management information and use the information to launch attacks against the system.System Administrator
SV-63407r1_rule GEN005306 CCI-001453 MEDIUM The SNMP service must require the use of a FIPS 140-2 approved cryptographic hash algorithm as part of its authentication and integrity methods. The SNMP service must use SHA-1 or a FIPS 140-2 approved successor for authentication and integrity.System Administrator
SV-63415r1_rule GEN005307 CCI-000068 MEDIUM The SNMP service must require the use of a FIPS 140-2 approved encryption algorithm for protecting the privacy of SNMP messages. The SNMP service must use AES or a FIPS 140-2 approved successor algorithm for protecting the privacy of communications.System Administrator
SV-63437r1_rule GEN005350 CCI-000225 MEDIUM Management Information Base (MIB) files must not have extended ACLs. The ability to read the MIB file could impart special knowledge to an intruder or malicious user about the ability to extract compromising information about the system or network.System Administrator
SV-63461r1_rule GEN005365 CCI-000225 MEDIUM The snmpd.conf file must be group-owned by root, bin, sys, or system. The snmpd.conf file contains authenticators and must be protected from unauthorized access and modification. If the file is not group-owned by a system group, it may be subject to access and modification from unauthorized users.System Administrator
SV-63463r1_rule GEN005375 CCI-000225 MEDIUM The snmpd.conf file must not have an extended ACL. The snmpd.conf file contains authenticators and must be protected from unauthorized access and modification.System Administrator
SV-63467r2_rule GEN005390 CCI-000225 MEDIUM The /etc/syslog.conf file must have mode 0640 or less permissive. Unauthorized users must not be allowed to access or modify the /etc/syslog.conf file.System Administrator
SV-63471r2_rule GEN005395 CCI-000225 MEDIUM The /etc/syslog.conf file must not have an extended ACL. Unauthorized users must not be allowed to access or modify the /etc/syslog.conf file.System Administrator
SV-63501r2_rule GEN005450 CCI-000136 MEDIUM The system must use a remote syslog server (loghost). A syslog server (loghost) receives syslog messages from one or more systems. This data can be used as an authoritative log source in the event a system is compromised and its local logs are suspect.System Administrator
SV-63547r1_rule GEN005501 CCI-001436 MEDIUM The SSH client must be configured to only use the SSHv2 protocol. SSHv1 is not a DoD-approved protocol and has many well-known vulnerability exploits. Exploits of the SSH client could provide access to the system with the privileges of the user running the client.System Administrator
SV-63553r1_rule GEN005504 CCI-000069 MEDIUM The SSH daemon must only listen on management network addresses unless authorized for uses other than management. The SSH daemon should only listen on network addresses designated for management traffic. If the system has multiple network interfaces and SSH listens on addresses not designated for management traffic, the SSH service could be subject to unauthorized access. If SSH is used for purposes other than management, such as providing an SFTP service, the list of approved listening addresses may be documented.trueSystem Administrator
SV-63561r2_rule GEN005505 CCI-000068 MEDIUM The SSH daemon must be configured to only use FIPS 140-2 approved ciphers. DoD information systems are required to use FIPS 140-2 approved ciphers. SSHv2 ciphers meeting this requirement are 3DES and AES.System Administrator
SV-63567r1_rule GEN005506 CCI-000366 MEDIUM The SSH daemon must be configured to not use Cipher-Block Chaining (CBC) ciphers. The Cipher-Block Chaining (CBC) mode of encryption as implemented in the SSHv2 protocol is vulnerable to chosen plain text attacks and must not be used. System Administrator
SV-63587r2_rule GEN005507 CCI-001453 MEDIUM The SSH daemon must be configured to only use Message Authentication Codes (MACs) employing FIPS 140-2 approved cryptographic hash algorithms. DoD information systems are required to use FIPS 140-2 approved cryptographic hash functions.System Administrator
SV-63593r1_rule GEN005510 CCI-000068 MEDIUM The SSH client must be configured to only use FIPS 140-2 approved ciphers. DoD information systems are required to use FIPS 140-2 approved ciphers. SSHv2 ciphers meeting this requirement are 3DES and AES.System Administrator
SV-63595r1_rule GEN005511 CCI-000366 MEDIUM The SSH client must be configured to not use Cipher-Block Chaining (CBC)-based ciphers. The (CBC) mode of encryption as implemented in the SSHv2 protocol is vulnerable to chosen-plaintext attacks and must not be used. System Administrator
SV-63669r2_rule GEN005512 CCI-001453 MEDIUM The SSH client must be configured to only use Message Authentication Codes (MACs) employing FIPS 140-2 approved cryptographic hash algorithms. DoD information systems are required to use FIPS 140-2 approved cryptographic hash functions.System Administrator
SV-63727r1_rule GEN005521 CCI-000225 MEDIUM The SSH daemon must restrict login ability to specific users and/or groups. Restricting SSH logins to a limited group of users, such as system administrators, prevents password-guessing and other SSH attacks from reaching system accounts and other accounts not authorized for SSH access.System Administrator
SV-63841r1_rule GEN005522 CCI-000225 MEDIUM The SSH public host key files must have mode 0644 or less permissive. If a public host key file is modified by an unauthorized user, the SSH service may be compromised.System Administrator
SV-63863r1_rule GEN005523 CCI-000225 MEDIUM The SSH private host key files must have mode 0600 or less permissive. If an unauthorized user obtains the private SSH host key file, the host could be impersonated.System Administrator
SV-63877r1_rule GEN005524 CCI-000366 LOW The SSH daemon must not permit GSSAPI authentication unless needed. GSSAPI authentication is used to provide additional authentication mechanisms to applications. Allowing GSSAPI authentication through SSH exposes the system's GSSAPI to remote hosts, increasing the attack surface of the system. GSSAPI authentication must be disabled unless needed.System Administrator
SV-63953r1_rule GEN005525 CCI-000366 LOW The SSH client must not permit GSSAPI authentication unless needed. GSSAPI authentication is used to provide additional authentication mechanisms to applications. Allowing GSSAPI authentication through SSH exposes the system's GSSAPI to remote hosts, increasing the attack surface of the system. GSSAPI authentication must be disabled unless needed.System Administrator
SV-64033r1_rule GEN005526 CCI-000366 LOW The SSH daemon must not permit Kerberos authentication unless needed. Kerberos authentication for SSH is often implemented using GSSAPI. If Kerberos is enabled through SSH, the SSH daemon provides a means of access to the system's Kerberos implementation. Vulnerabilities in the system's Kerberos implementation may then be subject to exploitation. To reduce the attack surface of the system, the Kerberos authentication mechanism within SSH must be disabled for systems not using this capability. System Administrator
SV-64067r1_rule GEN005536 CCI-000225 MEDIUM The SSH daemon must perform strict mode checking of home directory configuration files. If other users have access to modify user-specific SSH configuration files, they may be able to log into the system as another user.System Administrator
SV-64073r1_rule GEN005537 CCI-000225 MEDIUM The SSH daemon must use privilege separation. SSH daemon privilege separation causes the SSH process to drop root privileges when not needed, which would decrease the impact of software vulnerabilities in the unprivileged section.System Administrator
SV-64081r1_rule GEN005538 CCI-000366 MEDIUM The SSH daemon must not allow rhosts RSA authentication. If SSH permits rhosts RSA authentication, a user may be able to log in based on the keys of the host originating the request and not any user-specific authentication.System Administrator
SV-64089r1_rule GEN005539 CCI-000366 MEDIUM The SSH daemon must not allow compression or must only allow compression after successful authentication. If compression is allowed in an SSH connection prior to authentication, vulnerabilities in the compression software could result in compromise of the system from an unauthenticated connection, potentially with root privileges.System Administrator
SV-64103r1_rule GEN005550 CCI-000048 MEDIUM The SSH daemon must be configured with the Department of Defense (DoD) logon banner. Failure to display the DoD logon banner prior to a logon attempt will negate legal proceedings resulting from unauthorized access to system resources. The SSH service must be configured to display the DoD logon warning banner either through the SSH configuration or a wrapper program such as TCP_WRAPPERS. The SSH daemon may also be used to provide SFTP service. The warning banner configuration for SSH will apply to SFTP.System Administrator
SV-64107r1_rule GEN005570 CCI-000366 MEDIUM The system must be configured with a default gateway for IPv6 if the system uses IPv6, unless the system is a router. If a system has no default gateway defined, the system is at increased risk of man-in-the-middle, monitoring, and Denial of Service attacks.System Administrator
SV-64245r1_rule GEN005610 CCI-000366 MEDIUM The system must not have IP forwarding for IPv6 enabled, unless the system is an IPv6 router. If the system is configured for IP forwarding and is not a designated router, it could be used to bypass network security by providing a path for communication not filtered by network devices.System Administrator
SV-64211r1_rule GEN005750 CCI-000225 MEDIUM The Network File System (NFS) export configuration file must be group-owned by root, bin, sys, or system. Failure to give group-ownership of the NFS export configuration file to root or a system group provides the designated group-owner and possible unauthorized users with the potential to change system configuration which could weaken the system's security posture.System Administrator
SV-64191r1_rule GEN005770 CCI-000225 LOW The Network File System (NFS) exports configuration file must not have an extended ACL. File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. Excessive permissions on the NFS export configuration file could allow unauthorized modification of the file, which could result in Denial of Service to authorized NFS exports and the creation of additional unauthorized exports.System Administrator
SV-64181r1_rule GEN005810 CCI-000225 MEDIUM All Network File System (NFS) exported system files and system directories must be group-owned by root, bin, sys, or system. Failure to give group-ownership of sensitive files or directories to root provides the members of the owning group with the potential to access sensitive information or change system configuration which could weaken the system's security posture.System Administrator
SV-64085r1_rule GEN006150 CCI-000225 MEDIUM The /etc/smb.conf file must not have an extended ACL. Excessive permissions could endanger the security of the Samba configuration file and, ultimately, the system and network.System Administrator
SV-64061r1_rule GEN006210 CCI-000225 MEDIUM The /etc/smbpasswd file must not have an extended ACL. If the permissions of the "smbpasswd" file are too permissive, it may be maliciously accessed or modified, potentially resulting in the compromise of Samba accounts.System Administrator
SV-64049r1_rule GEN006225 CCI-000366 MEDIUM Samba must be configured to use an authentication mechanism other than share. Samba share authentication does not provide for individual user identification and must not be used.System Administrator
SV-64041r1_rule GEN006230 CCI-000366 MEDIUM Samba must be configured to use encrypted passwords. Samba must be configured to protect authenticators. If Samba passwords are not encrypted for storage, plain-text user passwords may be read by those with access to the Samba password file.System Administrator
SV-64013r1_rule GEN006235 CCI-000366 MEDIUM Samba must be configured to not allow guest access to shares. Guest access to shares permits anonymous access and is not permitted.System Administrator
SV-63925r1_rule GEN006270 CCI-000225 MEDIUM The /etc/news/incoming.conf file must not have an extended ACL. File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. Excessive permissions on the "incoming.conf" file may allow unauthorized modification which could lead to Denial of Service to authorized users or provide access to unauthorized users.System Administrator
SV-63915r1_rule GEN006290 CCI-000225 MEDIUM The /etc/news/hosts.nntp.nolimit file must not have an extended ACL. File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. Excessive permissions on the hosts.nntp.nolimit file may allow unauthorized modification which could lead to Denial of Service to authorized users or provide access to unauthorized users.System Administrator
SV-63901r1_rule GEN006310 CCI-000225 MEDIUM The /etc/news/nnrp.access file must not have an extended ACL. File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. Excessive permissions on the nnrp.access file may allow unauthorized modification which could lead to Denial of Service to authorized users or provide access to unauthorized users.System Administrator
SV-63835r1_rule GEN006330 CCI-000225 MEDIUM The /etc/news/passwd.nntp file must not have an extended ACL. Extended ACLs may provide excessive permissions on the /etc/news/passwd.nntp file, which may permit unauthorized access or modification to the NNTP configuration.System Administrator
SV-63667r1_rule GEN006565 CCI-000366 MEDIUM The system package management tool must be used to verify system software periodically. Verification using the system package management tool can be used to determine that system software has not been tampered with. This requirement is not applicable to systems not using package management tools.System Administrator
SV-63657r1_rule GEN006570 CCI-001297 LOW The file integrity tool must be configured to verify ACLs. ACLs can provide permissions beyond those permitted through the file mode and must be verified by file integrity tools.System Administrator
SV-63631r1_rule GEN006571 CCI-001297 LOW The file integrity tool must be configured to verify extended attributes. Extended attributes in file systems are used to contain arbitrary data and file metadata with security implications.System Administrator
SV-63653r1_rule GEN006575 CCI-001297 LOW The file integrity tool must use FIPS 140-2 approved cryptographic hashes for validating file contents. File integrity tools often use cryptographic hashes for verifying that file contents have not been altered. These hashes must be FIPS 140-2 approved.System Administrator
SV-63529r1_rule GEN007020 CCI-000382 MEDIUM The Stream Control Transmission Protocol (SCTP) must be disabled unless required. The Stream Control Transmission Protocol (SCTP) is an Internet Engineering Task Force (IETF)-standardized transport layer protocol. This protocol is not yet widely used. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the system to dynamically load a protocol handler by opening a socket using the protocol.System Administrator
SV-63521r1_rule GEN007080 CCI-000382 MEDIUM The Datagram Congestion Control Protocol (DCCP) must be disabled unless required. The DCCP is a proposed transport layer protocol. This protocol is not yet widely used. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the system to dynamically load a protocol handler by opening a socket using the protocol.System Administrator
SV-63453r1_rule GEN007260 CCI-000382 MEDIUM The AppleTalk protocol must be disabled or not installed. The AppleTalk suite of protocols is no longer in common use. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the system to dynamically load a protocol handler by opening a socket using the protocol.System Administrator
SV-63451r1_rule GEN007480 CCI-000382 MEDIUM The Reliable Datagram Sockets (RDS) protocol must be disabled or not installed unless required. The RDS protocol is a relatively new protocol developed by Oracle for communication between the nodes of a cluster. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the system to dynamically load a protocol handler by opening a socket using the protocol.System Administrator
SV-63449r1_rule GEN007540 CCI-000382 MEDIUM The Transparent Inter-Process Communication (TIPC) protocol must be disabled or uninstalled. The TIPC protocol is a relatively new cluster communications protocol developed by Ericsson. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the system to dynamically load a protocol handler by opening a socket using the protocol.System Administrator
SV-63447r1_rule GEN007660 CCI-001551 MEDIUM The Bluetooth protocol handler must be disabled or not installed. Bluetooth is a Personal Area Network (PAN) technology. Binding this protocol to the network stack increases the attack surface of the host. Unprivileged local processes may be able to cause the kernel to dynamically load a protocol handler by opening a socket using the protocol.System Administrator
SV-63423r1_rule GEN007780 CCI-001551 MEDIUM The system must not have 6to4 enabled. 6to4 is an IPv6 transition mechanism involving tunneling IPv6 packets encapsulated in IPv4 packets on an ad-hoc basis. This is not a preferred transition strategy and increases the attack surface of the system.System Administrator
SV-63417r1_rule GEN007800 CCI-001551 MEDIUM The system must not have Teredo enabled. Teredo is an IPv6 transition mechanism involving tunneling IPv6 packets encapsulated in IPv4 packets. Unauthorized tunneling may circumvent network security.System Administrator
SV-63413r1_rule GEN007820 CCI-001551 MEDIUM The system must not have IP tunnels configured. IP tunneling mechanisms can be used to bypass network filtering.System Administrator
SV-63411r1_rule GEN007840 CCI-000366 MEDIUM The DHCP client must be disabled if not needed. DHCP allows for the unauthenticated configuration of network parameters on the system by exchanging information with a DHCP server.System Administrator
SV-63409r1_rule GEN007850 CCI-000366 MEDIUM The DHCP client must not send dynamic DNS updates. Dynamic DNS updates transmit unencrypted information about a system including its name and address and should not be used unless needed.System Administrator
SV-63401r1_rule GEN007860 CCI-001551 MEDIUM The system must ignore IPv6 ICMP redirect messages. ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages modify the host's route table and are unauthenticated. An illicit ICMP redirect message could result in a man-in-the-middle attack.System Administrator
SV-63393r1_rule GEN007920 CCI-001551 MEDIUM The system must not forward IPv6 source-routed packets. Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the forwarding of source-routed traffic, such as when IPv6 forwarding is enabled and the system is functioning as a router. System Administrator
SV-63369r3_rule GEN007980 CCI-001453 MEDIUM If the system is using LDAP for authentication or account information, the system must use a TLS connection using FIPS 140-2 approved cryptographic algorithms. LDAP can be used to provide user authentication and account information, which are vital to system security. Communication between an LDAP server and a host using LDAP requires protection.System Administrator
SV-63365r1_rule GEN008000 CCI-000185 MEDIUM If the system is using LDAP for authentication or account information, certificates used to authenticate to the LDAP server must be provided from DoD PKI or a DoD-approved external PKI. LDAP can be used to provide user authentication and account information, which are vital to system security. Communication between an LDAP server and a host using LDAP requires authentication.System Administrator
SV-63361r1_rule GEN008020 CCI-000185 MEDIUM If the system is using LDAP for authentication or account information, the LDAP TLS connection must require the server provide a certificate with a valid trust path to a trusted CA. The NSS LDAP service provides user mappings which are a vital component of system security. Communication between an LDAP server and a host using LDAP for NSS require authentication.System Administrator
SV-63357r1_rule GEN008040 CCI-000185 MEDIUM If the system is using LDAP for authentication or account information, the system must verify the LDAP servers certificate has not been revoked. LDAP can be used to provide user authentication and account information, which are vital to system security. Communication between an LDAP server and a host using LDAP requires authentication.System Administrator
SV-63349r1_rule GEN008060 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information the /etc/ldap.conf (or equivalent) file must have mode 0644 or less permissive. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63321r1_rule GEN008080 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the /etc/ldap.conf (or equivalent) file must be owned by root. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63317r1_rule GEN008100 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the /etc/ldap.conf (or equivalent) file must be group-owned by root, bin, sys, or system. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63315r1_rule GEN008120 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the /etc/ldap.conf (or equivalent) file must not have an extended ACL. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63303r3_rule GEN008140 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the TLS certificate authority file and/or directory (as appropriate) must be owned by root. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63291r1_rule GEN008160 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the TLS certificate authority file and/or directory (as appropriate) must be group-owned by root, bin, sys, or system. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63289r1_rule GEN008180 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the TLS certificate authority file and/or directory (as appropriate) must have mode 0644 (0755 for directories) or less permissive. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63287r1_rule GEN008200 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the LDAP TLS certificate authority file and/or directory (as appropriate) must not have an extended ACL. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63257r1_rule GEN008220 CCI-000225 MEDIUM For systems using NSS LDAP, the TLS certificate file must be owned by root. The NSS LDAP service provides user mappings which are a vital component of system security. Its configuration must be protected from unauthorized modification.System Administrator
SV-63253r1_rule GEN008240 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the LDAP TLS certificate file must be group-owned by root, bin, sys, or system. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63249r2_rule GEN008260 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the LDAP TLS certificate file must have mode 0644 or less permissive. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63245r1_rule GEN008280 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the LDAP TLS certificate file must not have an extended ACL. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63243r1_rule GEN008300 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the LDAP TLS key file must be owned by root. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63235r1_rule GEN008320 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the LDAP TLS key file must be group-owned by root, bin, or sys. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63233r1_rule GEN008340 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the LDAP TLS key file must have mode 0600 or less permissive. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification. Note: Depending on the particular implementation, group and other read permission may be necessary for unprivileged users to successfully resolve account information using LDAP. This will still be a finding, as these permissions provide users with access to system authenticators.System Administrator
SV-63213r1_rule GEN008360 CCI-000225 MEDIUM If the system is using LDAP for authentication or account information, the LDAP TLS key file must not have an extended ACL. LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.System Administrator
SV-63197r1_rule GEN008420 CCI-000366 LOW The system must use available memory address randomization techniques. Successful exploitation of buffer overflow vulnerabilities relies in some measure to having a predictable address structure of the executing program. Address randomization techniques reduce the probability of a successful exploit.System Administrator
SV-63193r1_rule GEN008440 CCI-000366 LOW Automated file system mounting tools must not be enabled unless needed. Automated file system mounting tools may provide unprivileged users with the ability to access local media and network shares. If this access is not necessary for the system's operation, it must be disabled to reduce the risk of unauthorized access to these resources.System Administrator
SV-63189r1_rule GEN008460 CCI-000366 LOW The system must have USB disabled unless needed. USB is a common computer peripheral interface. USB devices may include storage devices with the potential to install malicious software on a system or exfiltrate data.trueSystem Administrator
SV-63179r1_rule GEN008480 CCI-000366 LOW The system must have USB Mass Storage disabled unless needed. USB is a common computer peripheral interface. USB devices may include storage devices with the potential to install malicious software on a system or exfiltrate datatrueSystem Administrator
SV-63173r1_rule GEN008500 CCI-000366 LOW The system must have IEEE 1394 (Firewire) disabled unless needed. Firewire is a common computer peripheral interface. Firewire devices may include storage devices with the potential to install malicious software on a system or exfiltrate data.trueSystem Administrator
SV-63149r1_rule GEN008520 CCI-001118 MEDIUM The system must employ a local firewall. A local firewall protects the system from exposing unnecessary or undocumented network services to the local enclave. If a system within the enclave is compromised, firewall protection on an individual system continues to protect it from attack.System Administrator
SV-63141r1_rule GEN008540 CCI-001109 MEDIUM The systems local firewall must implement a deny-all, allow-by-exception policy. A local firewall protects the system from exposing unnecessary or undocumented network services to the local enclave. If a system within the enclave is compromised, firewall protection on an individual system continues to protect it from attack.System Administrator
SV-63085r1_rule GEN000000-LNX00800 CCI-000366 LOW The system must use a Linux Security Module configured to limit the privileges of system services. Linux Security Modules such as SELinux and AppArmor can be used to provide protection from software exploits by explicitly defining the privileges permitted to each software package.System Administrator
SV-63091r1_rule GEN008740 CCI-000225 MEDIUM The systems boot loader configuration file(s) must not have extended ACLs. File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. If extended ACLs are present on the system's boot loader configuration file(s), these files may be vulnerable to unauthorized access or modification, which could compromise the system's boot process.System Administrator
SV-63089r1_rule GEN008760 CCI-000225 MEDIUM The systems boot loader configuration files must be owned by root. The system's boot loader configuration files are critical to the integrity of the system and must be protected. Unauthorized modification of these files resulting from improper ownership could compromise the system's boot loader configuration.System Administrator
SV-63069r1_rule GEN008780 CCI-000225 MEDIUM The systems boot loader configuration file(s) must be group-owned by root, bin, sys, or system. The system's boot loader configuration files are critical to the integrity of the system and must be protected. Unauthorized modifications resulting from improper group ownership may compromise the boot loader configuration.System Administrator
SV-63027r2_rule GEN008800 CCI-000351 LOW The system package management tool must cryptographically verify the authenticity of software packages during installation. To prevent the installation of software from unauthorized sources, the system package management tool must use cryptographic algorithms to verify the packages are authentic.System Administrator
SV-63025r1_rule GEN008820 CCI-001233 LOW The system package management tool must not automatically obtain updates. System package management tools can obtain a list of updates and patches from a package repository and make this information available to the SA for review and action. Using a package repository outside of the organization's control presents a risk of malicious packages being introduced.System Administrator
SV-62909r1_rule GEN000000-LNX00450 CCI-000225 MEDIUM The access.conf file must not have an extended ACL. If the access permissions are more permissive than 0640, system security could be compromised.System Administrator
SV-62983r1_rule GEN000000-LNX00530 CCI-000225 MEDIUM The /etc/sysctl.conf file must not have an extended ACL. The sysctl.conf file specifies the values for kernel parameters to be set on boot. These settings can affect the system's security.System Administrator
SV-63081r1_rule GEN000000-LNX00720 CCI-000366 LOW Auditing must be enabled at boot by setting a kernel parameter. If auditing is enabled late in the boot process, the actions of startup scripts may not be audited. Some audit systems also maintain state information only available if auditing is enabled before a given process is created.System Administrator
SV-64111r1_rule GEN005590 CCI-000366 MEDIUM The system must not be running any routing protocol daemons, unless the system is a router. Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this software is used when not required, system network information may be unnecessarily transmitted across the network.System Administrator
SV-63873r1_rule GEN002690 CCI-000162 MEDIUM System audit logs must be group-owned by root, bin, sys, or system. Sensitive system and user information could provide a malicious user with enough information to penetrate further into the system.System Administrator
SV-63359r1_rule GEN000410 CCI-000048 MEDIUM The FTPS/FTP service on the system must be configured with the Department of Defense (DoD) login banner. Failure to display the logon banner prior to a logon attempt will negate legal proceedings resulting from unauthorized access to system resources. Note: SFTP and FTPS are encrypted alternatives to FTP to be used in place of FTP. SFTP is implemented by the SSH service and uses its banner configuration.System Administrator
SV-64217r1_rule GEN003621 CCI-001208 LOW The system must use a separate file system for /var. The use of separate file systems for different paths can protect the system from failures resulting from a file system becoming full or failing.System Administrator
SV-64219r1_rule GEN003623 CCI-001208 LOW The system must use a separate file system for the system audit data path. The use of separate file systems for different paths can protect the system from failures resulting from a file system becoming full or failing.System Administrator
SV-64221r1_rule GEN003624 CCI-001208 LOW The system must use a separate file system for /tmp (or equivalent). The use of separate file systems for different paths can protect the system from failures resulting from a file system becoming full or failing.System Administrator
SV-64457r1_rule GEN003601 CCI-000366 MEDIUM TCP backlog queue sizes must be set appropriately. To provide some mitigation to TCP Denial of Service attacks, the TCP backlog queue sizes must be set to at least 1280 or in accordance with product-specific guidelines.System Administrator
SV-62879r2_rule GEN004710 CCI-001305 MEDIUM Mail relaying must be restricted. If unrestricted mail relaying is permitted, unauthorized senders could use this host as a mail relay for the purpose of sending SPAM or other unauthorized activity.System Administrator
SV-63379r1_rule GEN007960 CCI-000305 MEDIUM The ldd command must be disabled unless it protects against the execution of untrusted files. The 'ldd' command provides a list of dependent libraries needed by a given binary, which is useful for troubleshooting software. Instead of parsing the binary file, some 'ldd' implementations invoke the program with a special environment variable set, which causes the system dynamic linker to display the list of libraries. Specially crafted binaries can specify an alternate dynamic linker which may cause a program to be executed instead of examined. If the program is from an untrusted source, such as in a user home directory, or a file suspected of involvement in a system compromise, unauthorized software may be executed with the rights of the user running 'ldd'. Some 'ldd' implementations include protections that prevent the execution of untrusted files. Recent glibc RPMs delivered by this operating system also protect against the execution of untrusted files. If such protections exist, this requirement is not applicable. An acceptable method of disabling 'ldd' is changing its mode to 0000. The SA may conduct troubleshooting by temporarily changing the mode to allow execution and running the 'ldd' command as an unprivileged user upon trusted system binaries.System Administrator
SV-63385r1_rule GEN007950 CCI-000366 MEDIUM The system must not respond to ICMPv6 echo requests sent to a broadcast address. Responding to broadcast ICMP echo requests facilitates network mapping and provides a vector for amplification attacks.System Administrator
SV-63351r1_rule GEN000402 CCI-000048 MEDIUM The Department of Defense (DoD) login banner must be displayed immediately prior to, or as part of, graphical desktop environment login prompts. Failure to display the logon banner prior to a logon attempt will negate legal proceedings resulting from unauthorized access to system resources. This requirement applies to graphical desktop environments provided by the system to locally attached displays and input devices as well as to graphical desktop environments provided to remote systems, including thin clients.System Administrator
SV-63005r2_rule GEN009120 CCI-000768 MEDIUM The system, if capable, must be configured to require the use of a CAC, PIV compliant hardware token, or Alternate Logon Token (ALT) for authentication. In accordance with CTO 07-015 PKI authentication is required. This provides stronger, two-factor authentication than using a username/password. NOTE: The following are exempt from this, however, they must meet all password requirements and must be documented with the IAO: - Stand-alone systems. - Application Accounts. - Students or unpaid employees (such as, interns) who are not eligible to receive or not in receipt of a CAC, PIV, or ALT. - Warfighters and support personnel located at operational tactical locations conducting wartime operations that are not collocated with RAPIDS workstations to issue CAC; are not eligible for CAC or do not have the capability to use ALT. - Test systems that have an Interim Approval to Test (IATT) and provide protection via separate VPN, firewall, or security measures preventing access to network and system components from outside the protection boundary documented in the IATT.System Administrator
SV-64419r2_rule GEN002870 CCI-000136 LOW The system must be configured to send audit/system records to a remote audit server. System/Audit records contain evidence that can be used in the investigation of compromised systems. To prevent this evidence from compromise, it must be sent to a separate system continuously. Methods for sending audit records include, but are not limited to, system audit tools used to send logs directly to another host or through the system's syslog service to another host.System AdministratorECTB-1
SV-63355r3_rule GEN008050 CCI-000196 MEDIUM If the system is using LDAP for authentication or account information, the /etc/ldap.conf file (or equivalent) must not contain passwords. The authentication of automated LDAP connections between systems must not use passwords since more secure methods are available, such as PKI and Kerberos. Additionally, the storage of unencrypted passwords on the system is not permitted.System Administrator
SV-64021r1_rule GEN003850 CCI-000197 HIGH The telnet daemon must not be running. The telnet daemon provides a typically unencrypted remote access service which does not provide for the confidentiality and integrity of user passwords or the remote session. If a privileged user were to log on using this service, the privileged user password could be compromised.GEN003850-OL5If an enabled telnet daemon is configured to only allow encrypted sessions, such as with Kerberos or the use of encrypted network tunnels, the risk of exposing sensitive information is mitigated, and this is not a finding.System Administrator
SV-63097r1_rule GEN008710 CCI-000213 MEDIUM The system boot loader must protect passwords using an MD5 or stronger cryptographic hash. If system boot loader passwords are compromised, users with console access to the system may be able to alter the system boot configuration or boot the system into single user or maintenance mode, which could result in Denial of Service or unauthorized privileged access to the system.System Administrator
SV-63101r1_rule GEN000140-2 CCI-000293 MEDIUM A file integrity baseline including cryptographic hashes must be created. A file integrity baseline is a collection of file metadata which is to evaluate the integrity of the system. A minimal baseline must contain metadata for all device files, setuid files, setgid files, system libraries, system binaries, and system configuration files. The minimal metadata must consist of the mode, owner, group owner, and modification times. For regular files, metadata must also include file size and a cryptographic hash of the file's contents.System Administrator
SV-63129r1_rule GEN000140-3 CCI-000293 MEDIUM A file integrity baseline including cryptographic hashes must be maintained. A file integrity baseline is a collection of file metadata which is to evaluate the integrity of the system. A minimal baseline must contain metadata for all device files, setuid files, setgid files, system libraries, system binaries, and system configuration files. The minimal metadata must consist of the mode, owner, group owner, and modification times. For regular files, metadata must also include file size and a cryptographic hash of the file's contents.System Administrator
SV-63215r2_rule GEN000290-2 CCI-000012 MEDIUM The system must not have the unnecessary news account. Accounts that provide no operational purpose provide additional opportunities for system compromise. Unnecessary accounts include user accounts for individuals not requiring access to the system and application accounts for applications not installed on the system.System Administrator
SV-63227r2_rule GEN000290-3 CCI-000012 MEDIUM The system must not have the unnecessary gopher account. Accounts that provide no operational purpose provide additional opportunities for system compromise. Unnecessary accounts include user accounts for individuals not requiring access to the system and application accounts for applications not installed on the system.System Administrator
SV-63231r2_rule GEN000290-4 CCI-000012 MEDIUM The system must not have the unnecessary ftp account. Accounts that provide no operational purpose provide additional opportunities for system compromise. Unnecessary accounts include user accounts for individuals not requiring access to the system and application accounts for applications not installed on the system.System Administrator
SV-63609r1_rule GEN000500-2 CCI-000057 MEDIUM The graphical desktop environment must set the idle timeout to no more than 15 minutes. If graphical desktop sessions do not lock the session after 15 minutes of inactivity, requiring re-authentication to resume operations, the system or individual data could be compromised by an alert intruder who could exploit the oversight. This requirement applies to graphical desktop environments provided by the system to locally attached displays and input devices as well as to graphical desktop environments provided to remote systems, including thin clients.System Administrator
SV-63619r1_rule GEN000500-3 CCI-000057 MEDIUM Graphical desktop environments provided by the system must have automatic lock enabled. If graphical desktop sessions do not lock the session after 15 minutes of inactivity, requiring re-authentication to resume operations, the system or individual data could be compromised by an alert intruder who could exploit the oversight. This requirement applies to graphical desktop environments provided by the system to locally attached displays and input devices as well as to graphical desktop environments provided to remote systems, including thin clients.System Administrator
SV-63987r1_rule GEN000600-2 CCI-000192 MEDIUM Global settings defined in system-auth must be applied in the pam.d definition files. Pam global requirements are generally defined in the /etc/pam.d/system-auth or /etc/pam.d/system-auth-ac file. In order for the requirements to be applied the file containing them must be included directly or indirectly in each program's definition file in /etc/pam.d System Administrator
SV-64249r1_rule GEN002720-2 CCI-000126 MEDIUM The audit system must be configured to audit failed attempts to access files and programs. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64255r1_rule GEN002720-3 CCI-000126 MEDIUM The audit system must be configured to audit failed attempts to access files and programs. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System AdministratorECAR-1, ECAR-2, ECAR-3
SV-64257r1_rule GEN002720-4 CCI-000126 MEDIUM The audit system must be configured to audit failed attempts to access files and programs. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System AdministratorECAR-1, ECAR-2, ECAR-3
SV-64259r1_rule GEN002720-5 CCI-000126 MEDIUM The audit system must be configured to audit failed attempts to access files and programs. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System AdministratorECAR-1, ECAR-2, ECAR-3
SV-64265r1_rule GEN002740-2 CCI-000126 MEDIUM The audit system must be configured to audit file deletions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64471r1_rule GEN002760-2 CCI-000347 MEDIUM The audit system must be configured to audit all administrative, privileged, and security actions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64481r1_rule GEN002760-3 CCI-000347 MEDIUM The audit system must be configured to audit all administrative, privileged, and security actions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64489r1_rule GEN002760-4 CCI-000347 MEDIUM The audit system must be configured to audit all administrative, privileged, and security actions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64491r2_rule GEN002760-5 CCI-000347 MEDIUM The audit system must be configured to audit all administrative, privileged, and security actions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64529r1_rule GEN002760-6 CCI-000347 MEDIUM The audit system must be configured to audit all administrative, privileged, and security actions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64543r1_rule GEN002760-7 CCI-000347 MEDIUM The audit system must be configured to audit all administrative, privileged, and security actions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64551r1_rule GEN002760-8 CCI-000347 MEDIUM The audit system must be configured to audit all administrative, privileged, and security actions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64555r1_rule GEN002760-9 CCI-000347 MEDIUM The audit system must be configured to audit all administrative, privileged, and security actions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64275r1_rule GEN002760-10 CCI-000347 MEDIUM The audit system must be configured to audit all administrative, privileged, and security actions. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64611r1_rule GEN002820-2 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64609r1_rule GEN002820-3 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64607r1_rule GEN002820-4 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64605r1_rule GEN002820-5 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64603r1_rule GEN002820-6 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64601r1_rule GEN002820-7 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64599r1_rule GEN002820-8 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64591r1_rule GEN002820-9 CCI-002234 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64619r1_rule GEN002820-10 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64617r1_rule GEN002820-11 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64615r1_rule GEN002820-12 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64613r1_rule GEN002820-13 CCI-000126 MEDIUM The audit system must be configured to audit all discretionary access control permission modifications. If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.System Administrator
SV-64499r1_rule GEN002825-2 CCI-000126 MEDIUM The audit system must be configured to audit the loading and unloading of dynamic kernel modules - delete_module. Actions concerning dynamic kernel modules must be recorded as they are substantial events. Dynamic kernel modules can increase the attack surface of a system. A malicious kernel module can be used to substantially alter the functioning of a system, often with the purpose of hiding a compromise from the SA.System Administrator
SV-64495r1_rule GEN002825-3 CCI-000126 MEDIUM The audit system must be configured to audit the loading and unloading of dynamic kernel modules - /sbin/insmod. Actions concerning dynamic kernel modules must be recorded as they are substantial events. Dynamic kernel modules can increase the attack surface of a system. A malicious kernel module can be used to substantially alter the functioning of a system, often with the purpose of hiding a compromise from the SA.System Administrator
SV-64429r1_rule GEN002825-4 CCI-000126 MEDIUM The audit system must be configured to audit the loading and unloading of dynamic kernel modules -/sbin/modprobe. Actions concerning dynamic kernel modules must be recorded as they are substantial events. Dynamic kernel modules can increase the attack surface of a system. A malicious kernel module can be used to substantially alter the functioning of a system, often with the purpose of hiding a compromise from the SA.System Administrator
SV-64425r1_rule GEN002825-5 CCI-000126 MEDIUM The audit system must be configured to audit the loading and unloading of dynamic kernel modules - /sbin/rmmod Actions concerning dynamic kernel modules must be recorded as they are substantial events. Dynamic kernel modules can increase the attack surface of a system. A malicious kernel module can be used to substantially alter the functioning of a system, often with the purpose of hiding a compromise from the SA.System Administrator
SV-64385r1_rule GEN003080-2 CCI-000225 MEDIUM Files in cron script directories must have mode 0700 or less permissive. To protect the integrity of scheduled system jobs and prevent malicious modification to these jobs, crontab files must be secured.System Administrator
SV-63201r2_rule GEN000290-1 CCI-000012 MEDIUM The system must not have the unnecessary games account. Accounts that provide no operational purpose provide additional opportunities for system compromise. Unnecessary accounts include user accounts for individuals not requiring access to the system and application accounts for applications not installed on the system.
SV-62899r1_rule GEN006660 CCI-000017 LOW Accounts must be locked upon 35 days of inactivity. Disabling inactive accounts ensures that accounts which may not have been responsibly removed are not available to attackers who may have compromised their credentials.
SV-75259r1_rule GEN005527 CCI-000766 MEDIUM The SSH daemon must not allow host-based authentication. SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.
SV-75261r1_rule GEN001025 CCI-002038 MEDIUM The sudo command must require authentication. The "sudo" command allows authorized users to run programs (including shells) as other users, system users, and root. The "/etc/sudoers" file is used to configure authorized "sudo" users as well as the programs they are allowed to run. Some configuration options in the "/etc/sudoers" file allow configured users to run programs without re-authenticating. Use of these configuration options makes it easier for one compromised account to be used to compromise other accounts.
SV-87413r1_rule GEN007841 CCI-001443 MEDIUM Wireless network adapters must be disabled. The use of wireless networking can introduce many different attack vectors into the organization’s network. Common attack vectors such as malicious association and ad hoc networks will allow an attacker to spoof a wireless access point (AP), allowing validated systems to connect to the malicious AP and enabling the attacker to monitor and record network traffic. These malicious APs can also serve to create a man-in-the-middle attack or be used to create a denial of service to valid network resources.