HP-UX 11.31 Security Technical Implementation Guide

V1R9 2015-09-11       U_HPUX_11-31_V1R9_STIG_SCAP_1-1_Benchmark-xccdf.xml
The HP-UX 11.31 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]
Vuln Rule Version CCI Severity Title Description
SV-38444r1_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 AdministratorECWM-1
SV-38445r2_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 AdministratorECLO-1, ECLO-2
SV-38446r3_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 consecutive failed login attempts increases protection against automated password guessing attacks.GEN000480Attack mitigations to minimize risk: 1. Ensure that the “nodelay” parameter is not found in the /etc/pam.conf file. 2. In the file /opt/ssh/etc/sshd_config, the “MaxAuthTries” attribute must be explicitly set to “1”. This attribute controls the maximum number of authentication attempts permitted per SSH daemon connection. 3. In the file /opt/ssh/etc/sshd_config, the “MaxStartups” attribute must be explicitly set to an organization defined value of “10” (the default) or less. This attribute controls the maximum number of unauthenticated connections to the SSH daemon. 4. IPFilter DCA mode is disabled by default, and must be explicitly enabled. Set the following attribute in the /etc/rc.config.d/ipfconf file: DCA_START=1 The below /etc/opt/ipf/ipf.conf file rule specifies a connection limit of ““ for all hosts when attempting to connect to port ““. The ““ and ““ must be set to organization defined values. Per vendor documentation, this rule must be the next-to-last rule in /etc/opt/ipf/ipf.conf. The final rule in the file must define the default connection limit. See the below example for the last 2 line entries in /etc/opt/ipf/ipf.conf (note that the double quotes are for emphasis only): “pass in proto tcp from any to any port = keep limit “ “block in from any to any” Save the file before exiting the editor. The system should not require restarting for the new rule(s) to take effect. System AdministratorECLO-1, ECLO-2
SV-38448r2_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 AdministratorIAIA-1, IAIA-2
SV-38449r1_rule GEN000880 CCI-000366 MEDIUM The root account must be the only account having an UID of 0. If an account has an UID of 0, it has root authority. Multiple accounts with an UID of 0 afford more opportunity for potential intruders to compromise a privileged account.System AdministratorECLP-1, IAIA-1, IAIA-2
SV-34829r1_rule GEN000900 CCI-000366 LOW The root user's 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 plain user home directories.System AdministratorECCD-1, ECCD-2
SV-38450r1_rule GEN000920 CCI-000225 MEDIUM The root account's home directory (other than /) must have mode 0700. Permissions greater than 0700 could allow unauthorized users access to the root home directory.System AdministratorECCD-1, ECCD-2
SV-38451r1_rule GEN000940 CCI-000366 MEDIUM The root account's executable search path must be the vendor default and must contain only absolute 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 or two consecutive colons, this is interpreted as the current working directory. Entries starting with a slash (/) are absolute paths.System AdministratorECCD-1, ECCD-2, ECSC-1
SV-38452r1_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 AdministratorECCD-1, ECCD-2
SV-38453r2_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 AdministratorECPA-1, ECSD-2
SV-38455r1_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 that GID is subsequently created, the user may have unintended rights to the group.System AdministratorECSC-1
SV-38458r1_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 AdministratorECLP-1
SV-38459r1_rule GEN001800 CCI-000225 MEDIUM All skeleton files (typically those in /etc/skel) must have mode 0444 or less permissive. If the skeleton files are not protected, unauthorized personnel could change user startup parameters and possibly jeopardize user files. System AdministratorECLP-1
SV-38460r1_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, 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 AdministratorECLP-1
SV-38462r1_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, therefore, critical to system security. Unauthorized modification of these files could compromise these processes and the system.System AdministratorECLP-1
SV-38466r1_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 AdministratorECLP-1
SV-38467r1_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 AdministratorECLP-1
SV-38468r2_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 AdministratorECLP-1
SV-38469r1_rule GEN001380 CCI-000225 MEDIUM The /etc/passwd file must have mode 0444 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 AdministratorECLP-1
SV-38470r2_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. The Trusted Mode /tcb tree requires modes more permissive than the shadow file.System AdministratorECLP-1
SV-38475r1_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 AdministratorECCD-1, ECCD-2
SV-27264r2_rule GEN002640 CCI-000178 MEDIUM Default system accounts must be disabled or removed. Vendor accounts and software may contain backdoors that will allow unauthorized access to the system. These backdoors are common knowledge and present a threat to system security if the account is not disabled.System AdministratorIAAC-1
SV-38479r1_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 AdministratorECAR-1, ECAR-2, ECAR-3
SV-38480r1_rule GEN002740 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 AdministratorECAR-1, ECAR-2, ECAR-3
SV-38481r1_rule GEN002760 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 AdministratorECAR-1, ECAR-2, ECAR-3
SV-38482r1_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 AdministratorECAR-1, ECAR-2, ECAR-3
SV-38483r1_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 AdministratorECAR-1, ECAR-2, ECAR-3
SV-35067r1_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 which could weaken the system's security posture.System AdministratorECLP-1
SV-35072r1_rule GEN003740 CCI-000225 MEDIUM The inetd.conf and xinetd.conf files must have mode 0440 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 AdministratorECLP-1
SV-35077r1_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 which could weaken the system's security posture.System AdministratorECLP-1
SV-35078r1_rule GEN003780 CCI-000225 MEDIUM The services file must have mode 0444 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 AdministratorECLP-1
SV-38484r1_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 AdministratorECSC-1
SV-35140r1_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 AdministratorECCD-1, ECCD-2
SV-35143r1_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 AdministratorECLP-1
SV-35148r1_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 AdministratorECLP-1
SV-35161r1_rule GEN004360 CCI-000225 MEDIUM The alias file must be owned by root. If the aliases file is not owned by root, an unauthorized user may modify the file to add aliases to run malicious code or redirect e-mail.System AdministratorECLP-1
SV-35165r1_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 AdministratorECLP-1
SV-35169r1_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 AdministratorECLP-1
SV-35043r1_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 alias file has permissions greater than 0755, it can be modified by an unauthorized user and may contain malicious code or instructions possibly compromising the system.System AdministratorECLP-1
SV-35047r1_rule GEN004440 CCI-000366 LOW Sendmail logging must not be set to less than 9 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 AdministratorECAR-1, ECAR-2, ECAR-3
SV-35051r1_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 AdministratorECAR-1, ECAR-2, ECAR-3, ECSC-1
SV-35053r1_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 AdministratorECLP-1
SV-35058r1_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 AdministratorECLP-1
SV-35102r1_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 AdministratorECCD-1, ECCD-2
SV-38485r1_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 AdministratorECLP-1
SV-38486r1_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 AdministratorECLP-1
SV-35110r1_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 AdministratorECSC-1
SV-35155r1_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 AdministratorECPA-1
SV-35157r1_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 that someone could logon to the TFTP account and compromise the system.System AdministratorECSC-1
SV-38487r1_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 OfficerECSC-1
SV-38488r2_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 AdministratorECSC-1
SV-38489r2_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 AdministratorECSC-1
SV-38493r1_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 AdministratorECLP-1
SV-38495r1_rule GEN001600 CCI-000366 MEDIUM Run control scripts executable search paths must contain only absolute 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, or two consecutive colons, this is interpreted as the current working directory. Paths starting with a slash (/) are absolute 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, or two consecutive colons, this is interpreted as the current working directory. Paths starting with a slash (/) are absolute paths.System AdministratorECCD-1, ECCD-2
SV-38499r1_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 to be encrypted in storage and not used in access scripts.System AdministratorECCD-1, ECCD-2, IAIA-1, IAIA-2
SV-34952r1_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 AdministratorECSC-1
SV-34953r1_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 AdministratorECSC-1
SV-38501r1_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 AdministratorECLP-1
SV-38502r1_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 AdministratorECLP-1
SV-38505r1_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 AdministratorECCD-1, ECCD-2, ECLP-1
SV-35184r1_rule GEN005760 CCI-000225 LOW The Network File System (NFS) share configuration file must have mode 0644 or less permissive. Excessive permissions on the NFS share configuration file could allow unauthorized modification of the file, which could result in Denial-of-Service to authorized NFS shares and the creation of additional unauthorized shares.System AdministratorECCD-1, ECCD-2, ECLP-1
SV-35199r1_rule GEN005820 CCI-000062 MEDIUM The Network File System (NFS) anonymous UID and GID must be configured to values that have no 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 AdministratorECSC-1, IAIA-1, IAIA-2
SV-35201r1_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 shared file systems. If access is not restricted, unauthorized hosts may be able to access the system's NFS shares.System AdministratorECSC-1
SV-35202r1_rule GEN005880 CCI-000225 MEDIUM The 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 ManagerInformation Assurance OfficerEBRP-1
SV-35204r1_rule GEN005900 CCI-000225 MEDIUM The nosuid option must be enabled on all 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 ManagerInformation Assurance OfficerECPA-1
SV-35198r1_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 AdministratorEBRU-1
SV-35206r2_rule GEN006600 CCI-000126 MEDIUM The system's access control program must log each system’s 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 AdministratorECAR-1, ECAR-2, ECAR-3
SV-38681r2_rule GEN000000-HPUX0020 CCI-000293 MEDIUM The system must be configured to operate in a security mode. When operating in standard mode, account passwords are stored in the /etc/passwd file, which is world readable. By operating in either Trusted Mode or Standard Mode with Security Extensions, the system security posture is enhanced thru the addition of a secure, non-world readable password container other than /etc/passwd.System AdministratorDCSW-1
SV-965r2_rule GEN000000-HPUX0080 CCI-000225 MEDIUM The HP-UX /etc/securetty must be group-owned by root, sys, or bin. Root, sys, and bin are the most privileged group accounts, by default, for most UNIX systems. If a file as sensitive as /etc/securetty is not group-owned by a privileged group, it could lead to system compromise.System AdministratorECLP-1
SV-38682r1_rule GEN000000-HPUX0060 CCI-000225 MEDIUM The /etc/securetty file must be owned by root. Failure to make root the owner of sensitive files and utilities may provide unauthorized owners the potential to access and/or change sensitive information or system configurations, thus weakening the overall security posture of a site.System AdministratorECLP-1
SV-967r2_rule GEN000000-HPUX0100 CCI-000225 MEDIUM The /etc/securetty file must have mode 0640 or less permissive. Excessive permissions on the /etc/securetty file could result in unauthorized modification of the file. Changes to the file could reduce the system's security by specifying additional terminals permitted to accept root logins, or deny service by preventing root logins on authorized terminals.System AdministratorECCD-1, ECCD-2, ECLP-1
SV-38541r1_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 neither cron.allow nor cron.deny exists, then any account may use the cron facility. This may open the facility up for abuse by system intruders and malicious users.System AdministratorECLP-1
SV-38542r1_rule GEN002980 CCI-000225 MEDIUM The cron.allow file must have mode 0600 or less permissive. A cron.allow file, readable and/or writable by 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 AdministratorECLP-1
SV-38545r1_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 AdministratorECLP-1
SV-38546r1_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 AdministratorECLP-1
SV-38547r1_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 AdministratorECLP-1
SV-38548r1_rule GEN003140 CCI-000225 MEDIUM Cron and crontab directories must be group-owned by root, sys, bin or other. 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 AdministratorECLP-1
SV-38549r1_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 AdministratorECAR-1, ECAR-2, ECAR-3
SV-38550r1_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 AdministratorECLP-1, ECTP-1
SV-35033r1_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 AdministratorECLP-1
SV-38551r1_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.trueInformation Assurance OfficerSystem AdministratorECLP-1
SV-38552r1_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 AdministratorECPA-1
SV-38553r1_rule GEN003340 CCI-000225 MEDIUM The at.allow file must have mode 0600 or less permissive. Permissions more permissive than 0600 (i.e. read, write and execute for the owner) may allow unauthorized or malicious access to the at.allow and/or at.deny files.System AdministratorECLP-1
SV-35176r1_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 AdministratorECLP-1
SV-35178r1_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 AdministratorECLP-1
SV-38236r1_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 OfficerECSC-1
SV-35213r1_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 AdministratorECLP-1
SV-35221r1_rule GEN006140 CCI-000225 MEDIUM The /etc/opt/samba/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 AdministratorECLP-1
SV-35107r1_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 AdministratorECSC-1
SV-38207r1_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 AdministratorECPA-1
SV-35219r1_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 AdministratorECLP-1
SV-38208r1_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 AdministratorECSC-1
SV-38416r1_rule GEN000500 CCI-000057 MEDIUM Graphical desktop environments provided by the system must automatically lock after 15 minutes of inactivity and must require users to re-authenticate to unlock the environment. 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 AdministratorPESL-1
SV-38417r2_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, this would provide a potential intruder with the opportunity to keep guessing at one user's password until it was guessed correctly.System AdministratorIAIA-1, IAIA-2
SV-38429r2_rule GEN000000-HPUX0040 CCI-000126 MEDIUM The HP-UX AUDOMON_ARGS attribute must be explicitly initialized. The minimal set of auditing requirements necessary to collect useful forensics data and provide user help when violations are detected must be configured.System AdministratorECAR-1, ECAR-2, ECAR-3
SV-35057r1_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, thus, 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 which also satisfy this requirement.System AdministratorECAR-1, ECAR-2, ECAR-3
SV-35208r1_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 AdministratorDCPD-1, ECSC-1
SV-38430r1_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 AdministratorECLP-1
SV-38432r1_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 AdministratorECLP-1
SV-38433r1_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 AdministratorECLP-1
SV-38434r1_rule GEN003420 CCI-000225 MEDIUM The at directory must be owned by root, bin, or sys. 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 AdministratorECLP-1
SV-34997r1_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, sys, or bin, unauthorized users could be allowed to view or edit sensitive information contained within the file.System AdministratorECLP-1
SV-34998r1_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 AdministratorECLP-1
SV-35154r1_rule GEN003980 CCI-000225 MEDIUM The traceroute command must be group-owned by sys, bin, root, or other. 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 possibly leading to system and network compromise.System AdministratorECLP-1
SV-38435r1_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 possibly leading to system and network compromise.System AdministratorECLP-1
SV-38436r1_rule GEN004560 CCI-000366 LOW The SMTP service's 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 AdministratorECSC-1
SV-35061r1_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 AdministratorECSC-1
SV-35106r1_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 AdministratorECCD-1, ECCD-2
SV-38437r1_rule GEN005400 CCI-000225 MEDIUM The /etc/syslog.conf file must be owned by bin. If the /etc/syslog.conf file is not owned by bin, unauthorized users could be allowed to view, edit, or delete important system messages handled by the syslog facility.System AdministratorECLP-1
SV-35186r1_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 AdministratorECLP-1
SV-38439r1_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 AdministratorECLP-1
SV-35132r2_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.trueInformation Assurance OfficerSystem AdministratorEBRP-1, ECSC-1
SV-35076r1_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 your log file for the response from the server.System AdministratorECSC-1
SV-35083r1_rule GEN004680 CCI-000366 LOW The SMTP service must not have the VRFY feature active. The VRFY (Verify) 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 AdministratorECSC-1
SV-35171r1_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 AdministratorECSC-1
SV-35136r1_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 could expose information that could be used in subsequent attacks.System AdministratorDCPP-1, EBRU-1
SV-27111r4_rule GEN000580 CCI-000205 MEDIUM The system must require that 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 AdministratorIAIA-1, IAIA-2
SV-38244r2_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 AdministratorIAIA-1, IAIA-2
SV-38245r2_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 AdministratorIAIA-1, IAIA-2
SV-38246r2_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 AdministratorIAIA-1, IAIA-2
SV-38266r1_rule GEN001720 CCI-000225 MEDIUM All global initialization files must have mode 0444 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 AdministratorECLP-1
SV-38267r1_rule GEN001740 CCI-000225 MEDIUM All global initialization files must be owned by bin. 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 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 AdministratorECLP-1
SV-38268r1_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 AdministratorECLP-1
SV-38269r1_rule GEN001820 CCI-000225 MEDIUM All skeleton files and directories (typically in /etc/skel) must be owned by 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 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 AdministratorECLP-1
SV-38270r1_rule GEN001840 CCI-000366 MEDIUM All global initialization files' executable search paths must contain only absolute 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, or two consecutive colons, this is interpreted as the current working directory. Paths starting with a slash (/) are absolute paths.System AdministratorECCD-1, ECCD-2
SV-34915r1_rule GEN001900 CCI-000366 MEDIUM All local initialization files' executable search paths must contain only absolute 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, or two consecutive colons, this is interpreted as the current working directory. Paths starting with a slash (/) are absolute paths.System AdministratorECCD-1, ECCD-2
SV-38249r1_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.Information Assurance OfficerSystem AdministratorECCD-1, ECCD-2
SV-38264r1_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.Information Assurance OfficerSystem AdministratorECCD-1, ECCD-2
SV-38251r1_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 AdministratorECPA-1
SV-35008r1_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 AdministratorECCD-1, ECCD-2
SV-35009r1_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 AdministratorECCD-1, ECCD-2, ECSC-1
SV-38259r1_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 AdministratorECSC-1
SV-35048r1_rule GEN003620 CCI-001208 LOW A separate file system must be used for user home directories (such as /home or equivalent). The use of separate file systems for different paths can protect the system from failures resulting from the / file system becoming full or failing.trueSystem AdministratorECSC-1
SV-35064r1_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 AdministratorECSC-1
SV-35059r1_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 AdministratorECSC-1
SV-38263r1_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.System AdministratorECCD-1, ECCD-2
SV-35162r1_rule GEN005180 CCI-000225 MEDIUM All .Xauthority files must have mode 0600 or less permissive. .Xauthority files ensure the user is authorized to access the 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 AdministratorECLP-1
SV-35203r1_rule GEN005360 CCI-000225 MEDIUM The snmpd.conf file must be owned by bin. The snmpd.conf file contains authenticators and must be protected from unauthorized access and modification. If the file is not owned by bin, it may be subject to access and modification from unauthorized users.System AdministratorECLP-1
SV-35195r1_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 AdministratorECSC-1
SV-35149r1_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 AdministratorECSC-1, ECWM-1
SV-35177r1_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 AdministratorECSC-1
SV-35222r1_rule GEN006620 CCI-000366 MEDIUM The system's 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 AdministratorECCD-1, ECCD-2, ECSC-1
SV-35138r1_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.System AdministratorDCPA-1
SV-38272r1_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 AdministratorECLP-1
SV-38273r1_rule GEN000251 CCI-000225 MEDIUM The time synchronization configuration file (such as /etc/ntp.conf) must be group-owned by root, bin, sys, or system. 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 AdministratorECLP-1
SV-38274r1_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 AdministratorECLP-1
SV-26319r2_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 AdministratorECSC-1
SV-38302r1_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 AdministratorECSC-1
SV-38304r2_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 AdministratorIAIA-1, IAIA-2
SV-26349r1_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 AdministratorECLP-1
SV-38307r1_rule GEN000945 CCI-000366 MEDIUM The root account's 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 AdministratorECSC-1
SV-38308r1_rule GEN000950 CCI-000366 MEDIUM The root account's 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 AdministratorECSC-1
SV-38310r1_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 AdministratorECLP-1
SV-38311r1_rule GEN001363 CCI-000225 MEDIUM The /etc/resolv.conf file must be group-owned by root, bin, sys, or system. 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 AdministratorECLP-1
SV-38312r1_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 AdministratorECLP-1
SV-38313r1_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 AdministratorECLP-1
SV-38314r1_rule GEN001367 CCI-000225 MEDIUM The /etc/hosts file must be group-owned by root, bin, sys, or system. 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 AdministratorECLP-1
SV-38315r1_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 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 AdministratorECLP-1
SV-38316r1_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 AdministratorECLP-1
SV-38317r1_rule GEN001372 CCI-000225 MEDIUM The /etc/nsswitch.conf file must be group-owned by root, bin, sys, or system. 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 AdministratorECLP-1
SV-38319r1_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 AdministratorECLP-1
SV-38335r1_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 AdministratorECLP-1
SV-38336r1_rule GEN001379 CCI-000225 MEDIUM The /etc/passwd file must be group-owned by root, bin, sys, or system. 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 AdministratorECLP-1
SV-38337r1_rule GEN001391 CCI-000225 MEDIUM The /etc/group file must be owned by bin. 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 AdministratorECLP-1
SV-38338r1_rule GEN001392 CCI-000225 MEDIUM The /etc/group file must be group-owned by root, bin, sys, or system. 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 AdministratorECLP-1
SV-38339r1_rule GEN001393 CCI-000225 MEDIUM The /etc/group file must have mode 0444 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 AdministratorECLP-1
SV-38340r2_rule GEN001410 CCI-000225 MEDIUM The /etc/shadow file (or equivalent) must be group-owned by root, bin, sys or other. 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 AdministratorECLP-1
SV-38323r2_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 AdministratorECLP-1
SV-38341r1_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 AdministratorECLP-1
SV-38343r1_rule GEN001605 CCI-000366 MEDIUM Run control scripts' library search paths 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. Paths starting with a slash (/) are absolute paths. System AdministratorECSC-1
SV-38344r1_rule GEN001610 CCI-000366 MEDIUM Run control scripts' lists of preloaded libraries must contain only absolute 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 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 a slash (/) are absolute paths.System AdministratorECSC-1
SV-38347r1_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 AdministratorECLP-1
SV-38348r1_rule GEN001845 CCI-000366 MEDIUM Global initialization files' library search paths must contain only absolute paths. The library search path environment variable(s) contains 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. Paths starting with a slash (/) are absolute paths.System AdministratorECSC-1
SV-38349r1_rule GEN001850 CCI-000366 MEDIUM Global initialization files' lists of preloaded libraries must contain only absolute 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 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 a slash (/) are absolute paths.System AdministratorECSC-1
SV-38351r1_rule GEN001901 CCI-000366 MEDIUM Local initialization files' library search paths 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. Paths starting with a slash (/) are absolute paths.System AdministratorECSC-1
SV-34928r1_rule GEN001902 CCI-000366 MEDIUM Local initialization files' lists of preloaded libraries must contain only absolute 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 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 a slash (/) are absolute paths.System AdministratorECSC-1
SV-38352r1_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 AdministratorECLP-1
SV-26506r2_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 AdministratorECLP-1
SV-26509r2_rule GEN002716 CCI-001493 LOW System audit tool executables must be group-owned by root, bin, sys, or other. To prevent unauthorized access or manipulation of system audit logs, the tools for manipulating those logs must be protected.System AdministratorECLP-1
SV-26512r2_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 AdministratorECLP-1
SV-29653r1_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 AdministratorECSC-1
SV-29670r1_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 AdministratorECAT-1
SV-29675r1_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 AdministratorECAT-1
SV-29676r1_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 AdministratorECAT-1
SV-29679r1_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 AdministratorECAT-1
SV-34991r1_rule GEN003250 CCI-000225 MEDIUM The cron.allow file must be group-owned by root, bin, sys or other. If the group of the cron.allow is not set to root, bin, sys or other, 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 AdministratorECLP-1
SV-26557r1_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 AdministratorECLP-1
SV-34993r1_rule GEN003270 CCI-000225 MEDIUM The cron.deny file must be group-owned by root, bin, sys or other. 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 AdministratorECLP-1
SV-34995r1_rule GEN003430 CCI-000225 MEDIUM The at directory must be group-owned by root, bin, sys or other. If the group of the at directory is not root, bin, sys or other, unauthorized users could be allowed to view or edit files containing sensitive information within the directory. System AdministratorECLP-1
SV-26571r1_rule GEN003470 CCI-000225 MEDIUM The at.allow file must be group-owned by root, sys, bin or other. If the group-owner of the at.allow file is not set to root, sys, bin or other, 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 AdministratorECLP-1
SV-26574r1_rule GEN003490 CCI-000225 MEDIUM The at.deny file must be group-owned by root, bin, sys, or other. If the group-owner of the at.deny file is not set to root, bin, sys, other, 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 AdministratorECLP-1
SV-26611r1_rule GEN003521 CCI-000225 LOW The kernel core dump data directory must be group-owned by root, bin, sys, or other. 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 AdministratorECLP-1
SV-26615r1_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 AdministratorECLP-1
SV-35022r1_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 AdministratorECSC-1
SV-35025r1_rule GEN003603 CCI-001551 MEDIUM The system must not respond to ICMPv4 echoes sent to a broadcast address. Responding to broadcast Internet Control Message Protocol (ICMP) echoes facilitates network mapping and provides a vector for amplification attacks.System AdministratorECSC-1
SV-35026r1_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.System AdministratorECSC-1
SV-35028r1_rule GEN003605 CCI-001551 MEDIUM The system must not apply reversed source routing to TCP responses. 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. System AdministratorECSC-1
SV-29707r1_rule GEN003606 CCI-001551 MEDIUM The system must prevent local applications from generating 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.System AdministratorECSC-1
SV-29713r1_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, such as when IPv4 forwarding is enabled and the system is functioning as a router.System AdministratorECSC-1
SV-29719r1_rule GEN003609 CCI-001503 MEDIUM The system must ignore IPv4 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 AdministratorECSC-1
SV-35038r1_rule GEN003610 CCI-001551 MEDIUM The system must not send IPv4 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 AdministratorECSC-1
SV-35069r1_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 other. 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 which could weaken the system's security posture.System AdministratorECLP-1
SV-35074r1_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 AdministratorECLP-1
SV-35080r1_rule GEN003770 CCI-000225 MEDIUM The services file must be group-owned by root, bin, sys, or other. 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 which could weaken the system's security posture.System AdministratorECLP-1
SV-35129r1_rule GEN003825 CCI-000305 MEDIUM The remshd service must not be installed. The remshd process provides a typically unencrypted, host-authenticated remote access service. SSH should be used in place of this service.System AdministratorDCPP-1
SV-29697r1_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 AdministratorDCPP-1
SV-35144r1_rule GEN003930 CCI-000225 MEDIUM The hosts.lpd (or equivalent) file must be group-owned by root, bin, sys, or system. 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 AdministratorECLP-1
SV-35163r1_rule GEN004370 CCI-000225 MEDIUM The aliases file must be group-owned by root, sys, bin, or other. If the alias file is not group-owned by root, bin, sys or other, an unauthorized user may modify the file to add aliases to run malicious code or redirect e-mail.System AdministratorECLP-1
SV-38373r1_rule GEN004410 CCI-000225 MEDIUM Files executed through a mail aliases file must be group-owned by root, bin, sys, or other, and must reside within a directory group-owned by root, bin, sys, or other. 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 AdministratorECLP-1
SV-35104r1_rule GEN004930 CCI-000225 MEDIUM The ftpusers file must be group-owned by root, bin, sys or other. 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 AdministratorECLP-1
SV-26734r1_rule GEN005365 CCI-000225 MEDIUM The snmpd.conf file must be group-owned by root, sys, bin or other. The snmpd.conf file contains authenticators and must be protected from unauthorized access and modification. If the file is not group-owned by root or a system group, it may be subject to access and modification from unauthorized users.System AdministratorECLP-1
SV-38376r1_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 AdministratorECLP-1
SV-35189r1_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 AdministratorECAT-1
SV-35188r1_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 AdministratorDCNR-1
SV-35193r1_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 AdministratorECSC-1
SV-35210r2_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 AdministratorDCNR-1
SV-35052r1_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 AdministratorECLP-1
SV-35060r1_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 AdministratorECLP-1
SV-35063r1_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 AdministratorECLP-1
SV-35066r1_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 AdministratorECSC-1
SV-35068r1_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 AdministratorECSC-1
SV-35075r1_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 AdministratorECSC-1
SV-35137r1_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 AdministratorECLP-1
SV-35139r1_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 AdministratorECLP-1
SV-35142r1_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 login based on the keys of the host originating the request and not any user-specific authentication..System AdministratorECSC-1
SV-35146r1_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 AdministratorECSC-1
SV-26811r1_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 AdministratorECSC-1
SV-35196r1_rule GEN005810 CCI-000225 MEDIUM All Network File System (NFS) shared system files and system directories must be group-owned by root, bin, sys, or other. 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 AdministratorECLP-1
SV-35109r1_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 AdministratorECSC-1
SV-35111r1_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 AdministratorIAIA-1, IAIA-2
SV-35112r1_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 AdministratorECSC-1
SV-29988r1_rule GEN007020 CCI-000382 MEDIUM The Stream Control Transmission Protocol (SCTP) must be disabled unless required. The SCTP is an 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 kernel to dynamically load a protocol handler by opening a socket using the protocol.System AdministratorECSC-1
SV-26928r1_rule GEN007820 CCI-001551 MEDIUM The system must not have IP tunnels configured. IP tunneling mechanisms can be used to bypass network filtering.System AdministratorECSC-1
SV-26932r1_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 AdministratorECSC-1
SV-35241r1_rule GEN007860 CCI-001551 MEDIUM The system must ignore IPv6 Internet Control Message Protocol (ICMP ) redirect messages. ICMP redirect messages are used by routers to inform hosts of a more direct route existing 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 AdministratorECSC-1
SV-26939r1_rule GEN007880 CCI-001551 MEDIUM The system must not send IPv6 ICMP redirects. ICMP redirect messages are used by routers to inform hosts of a more direct route existing for a particular destination. These messages contain information from the system's route table possibly revealing portions of the network topology.System AdministratorECSC-1
SV-38381r1_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 and this certificate has 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 AdministratorDCNR-1
SV-38386r1_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 AdministratorECLP-1
SV-38387r1_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 other. 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 AdministratorECLP-1
SV-38388r1_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 AdministratorECLP-1
SV-38390r1_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 AdministratorECLP-1
SV-38391r1_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 other. 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 AdministratorECLP-1
SV-38392r1_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 AdministratorECLP-1
SV-38394r1_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 AdministratorECLP-1
SV-38395r1_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, sys, or other. 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 AdministratorECLP-1
SV-38396r1_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 AdministratorECLP-1
SV-38377r1_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 AdministratorECSC-1
SV-38403r1_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 AdministratorECSC-1
SV-38405r1_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 that malicious packages could be introduced.System AdministratorECSC-1
SV-38407r1_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 that should be used in place of FTP. SFTP is implemented by the SSH service and uses its banner configuration. System AdministratorECWM-1
SV-35050r1_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 AdministratorECSC-1
SV-35054r1_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 AdministratorECSC-1
SV-35055r1_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 AdministratorECSC-1
SV-29690r1_rule GEN003601 CCI-000366 MEDIUM TCP backlog queue sizes must be set appropriately. To provide some mitigation to TCP Denial of Service (DoS) attacks, the TCP backlog queue sizes must be set to at least 1280 or in accordance with product-specific guidelines.System AdministratorECSC-1
SV-29786r1_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 AdministratorECSC-1
SV-38411r1_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 AdministratorECWM-1
SV-38414r1_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 AdministratorIAIA-1, IAIA-2
SV-35134r1_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.GEN003850If 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 AdministratorDCPP-1