Oracle Linux 8 Security Technical Implementation Guide

Description

This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DoD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: [email protected]

Details

Version / Release: V1R3

Published: 2022-06-06

Updated At: 2022-08-25 11:39:05

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    Vuln Rule Version CCI Severity Title Description Status Finding Details Comments
    SV-248519r779123_rule OL08-00-030180 CCI-000130 MEDIUM The OL 8 audit package must be installed. Without establishing what type of events occurred and their source, location, and outcome, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be necessary to satisf
    SV-248520r818594_rule OL08-00-030181 CCI-000130 MEDIUM OL 8 audit records must contain information to establish what type of events occurred, the source of events, where events occurred, and the outcome of events. Without establishing what type of events occurred and their source, location, and outcome, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be necessary to satisf
    SV-248521r779129_rule OL08-00-010000 CCI-000366 HIGH OL 8 must be a vendor-supported release. Configuring the operating system to implement organization-wide security implementation guides and security checklists verifies compliance with federal standards and establishes a common security baseline across the DoD that reflects the most restrictive
    SV-248522r779132_rule OL08-00-010001 CCI-001233 MEDIUM The OL 8 operating system must implement the Endpoint Security for Linux Threat Prevention tool. Adding endpoint security tools can provide the capability to automatically take actions in response to malicious behavior, which can provide additional agility in reacting to network threats. These tools also often include a reporting capability to provid
    SV-248523r779135_rule OL08-00-010010 CCI-000366 MEDIUM OL 8 vendor-packaged system security patches and updates must be installed and up to date. Timely patching is critical for maintaining the operational availability, confidentiality, and integrity of information technology (IT) systems. However, failure to keep operating system and application software patched is a common mistake made by IT prof
    SV-248524r818787_rule OL08-00-010020 CCI-000068 HIGH OL 8 must implement NIST FIPS-validated cryptography for the following: To provision digital signatures, to generate cryptographic hashes, and to protect data requiring data-at-rest protections in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards. Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. The operating system must implement cryptographic modules adhering to the higher standards approved by the federal government since this provides as
    SV-248525r818596_rule OL08-00-010030 CCI-001199 MEDIUM All OL 8 local disk partitions must implement cryptographic mechanisms to prevent unauthorized disclosure or modification of all information that requires at-rest protection. OL 8 systems handling data requiring "data-at-rest" protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest. Selection of a cryptographic mechanism is based on the need to protect
    SV-248526r779144_rule OL08-00-010040 CCI-000048 MEDIUM OL 8 must display the Standard Mandatory DoD Notice and Consent Banner before granting local or remote access to the system via an SSH logon. Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations,
    SV-248527r779147_rule OL08-00-010049 CCI-000048 MEDIUM OL 8 must display a banner before granting local or remote access to the system via a graphical user logon. Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations,
    SV-248528r779150_rule OL08-00-010050 CCI-000048 MEDIUM OL 8 must display the Standard Mandatory DoD Notice and Consent Banner before granting local or remote access to the system via a graphical user logon. Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations,
    SV-248529r779153_rule OL08-00-010060 CCI-000048 MEDIUM OL 8 must display the Standard Mandatory DoD Notice and Consent Banner before granting local or remote access to the system via a command line user logon. Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations,
    SV-248530r779156_rule OL08-00-010070 CCI-000067 MEDIUM All OL 8 remote access methods must be monitored. Remote access services, such as those providing remote access to network devices and information systems, which lack automated monitoring capabilities increase risk and make remote user access management difficult at best. Remote access is access to Do
    SV-248531r818598_rule OL08-00-010090 CCI-000185 MEDIUM OL 8, for PKI-based authentication, must validate certificates by constructing a certification path (which includes status information) to an accepted trust anchor. Without path validation, the relying party cannot make an informed trust decision when presented with any certificate not already explicitly trusted. A trust anchor is an authoritative entity represented via a public key and associated data. It is used
    SV-248532r779162_rule OL08-00-010100 CCI-000186 MEDIUM OL 8, for certificate-based authentication, must enforce authorized access to the corresponding private key. If an unauthorized user obtains access to a private key without a passcode, that user would have unauthorized access to any system where the associated public key has been installed.
    SV-248533r779165_rule OL08-00-010110 CCI-000196 MEDIUM OL 8 must encrypt all stored passwords with a FIPS 140-2 approved cryptographic hashing algorithm. Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Unapproved mechanisms that are used for aut
    SV-248534r779168_rule OL08-00-010120 CCI-000196 MEDIUM OL 8 must employ FIPS 140-2 approved cryptographic hashing algorithms for all stored passwords. The system must use a strong hashing algorithm to store the password. Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear tex
    SV-248535r818601_rule OL08-00-010130 CCI-000196 MEDIUM The OL 8 shadow password suite must be configured to use a sufficient number of hashing rounds. The system must use a strong hashing algorithm to store the password. The system must use a sufficient number of hashing rounds to ensure the required level of entropy. Passwords need to be protected at all times, and encryption is the standard method
    SV-248537r779177_rule OL08-00-010140 CCI-000213 HIGH OL 8 operating systems booted with United Extensible Firmware Interface (UEFI) must require authentication upon booting into single-user mode and maintenance. If the system does not require valid authentication before it boots into single-user or maintenance mode, anyone who invokes single-user or maintenance mode is granted privileged access to all files on the system. GRUB 2 is the default boot loader for OL
    SV-248538r818603_rule OL08-00-010141 CCI-000213 MEDIUM OL 8 operating systems booted with United Extensible Firmware Interface (UEFI) must have a unique name for the grub superusers account when booting into single-user mode and maintenance. If the system does not require valid authentication before it boots into single-user or maintenance mode, anyone who invokes single-user or maintenance mode is granted privileged access to all files on the system. GRUB 2 is the default boot loader for OL
    SV-248539r818605_rule OL08-00-010149 CCI-000213 MEDIUM OL 8 operating systems booted with a BIOS must have a unique name for the grub superusers account when booting into single-user and maintenance modes. If the system does not require valid authentication before it boots into single-user or maintenance mode, anyone who invokes single-user or maintenance mode is granted privileged access to all files on the system. GRUB 2 is the default boot loader for OL
    SV-248540r779186_rule OL08-00-010150 CCI-000213 HIGH OL 8 operating systems booted with a BIOS must require authentication upon booting into single-user and maintenance modes. If the system does not require valid authentication before it boots into single-user or maintenance mode, anyone who invokes single-user or maintenance mode is granted privileged access to all files on the system. GRUB 2 is the default boot loader for OL
    SV-248541r779189_rule OL08-00-010151 CCI-000213 MEDIUM OL 8 operating systems must require authentication upon booting into rescue mode. If the system does not require valid root authentication before it boots into emergency or rescue mode, anyone who invokes emergency or rescue mode is granted privileged access to all files on the system.
    SV-248542r779192_rule OL08-00-010152 CCI-000213 MEDIUM OL 8 operating systems must require authentication upon booting into emergency mode. If the system does not require valid root authentication before it boots into emergency or rescue mode, anyone who invokes emergency or rescue mode is granted privileged access to all files on the system.
    SV-248543r818608_rule OL08-00-010159 CCI-000803 MEDIUM The OL 8 "pam_unix.so" module must be configured in the system-auth file to use a FIPS 140-2 approved cryptographic hashing algorithm for system authentication. Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied on to provide confidentiality or integrity, and DoD data may be compromised. OL 8 systems using encryption are required t
    SV-248544r818611_rule OL08-00-010160 CCI-000803 MEDIUM The OL 8 "pam_unix.so" module must be configured in the password-auth file to use a FIPS 140-2 approved cryptographic hashing algorithm for system authentication. Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied on to provide confidentiality or integrity, and DoD data may be compromised. OL 8 systems using encryption are required t
    SV-248545r779201_rule OL08-00-010161 CCI-000803 MEDIUM OL 8 must prevent system daemons from using Kerberos for authentication. Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied on to provide confidentiality or integrity, and DoD data may be compromised. OL 8 systems using encryption are required to
    SV-248546r779204_rule OL08-00-010162 CCI-000803 MEDIUM The krb5-workstation package must not be installed on OL 8. Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied on to provide confidentiality or integrity, and DoD data may be compromised. OL 8 systems using encryption are required to
    SV-248547r779207_rule OL08-00-010163 CCI-000803 MEDIUM The krb5-server package must not be installed on OL 8. Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied on to provide confidentiality or integrity, and DoD data may be compromised. OL 8 systems using encryption are required to
    SV-248548r779210_rule OL08-00-010170 CCI-001084 MEDIUM OL 8 must use a Linux Security Module configured to enforce limits on system services. Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the
    SV-248549r779213_rule OL08-00-010171 CCI-001084 LOW OL 8 must have the "policycoreutils" package installed. Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the
    SV-248551r779219_rule OL08-00-010190 CCI-001090 MEDIUM A sticky bit must be set on all OL 8 public directories to prevent unauthorized and unintended information transferred via shared system resources. Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from bein
    SV-248552r779222_rule OL08-00-010200 CCI-000879 MEDIUM OL 8 must be configured so that all network connections associated with SSH traffic are terminate after a period of inactivity. Terminating an idle SSH session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly term
    SV-248553r779225_rule OL08-00-010201 CCI-000879 MEDIUM OL 8 must be configured so that all network connections associated with SSH traffic are terminated at the end of the session or after 10 minutes of inactivity. Terminating an idle SSH session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly term
    SV-248554r779228_rule OL08-00-010210 CCI-001314 MEDIUM The OL 8 "/var/log/messages" file must have mode 0640 or less permissive. Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the OL 8 system or platform. Additionally, Personally Identifiable Information (PII)
    SV-248555r779231_rule OL08-00-010220 CCI-001314 MEDIUM The OL 8 "/var/log/messages" file must be owned by root. Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the OL 8 system or platform. Additionally, Personally Identifiable Information (PII)
    SV-248556r779234_rule OL08-00-010230 CCI-001314 MEDIUM The OL 8 "/var/log/messages" file must be group-owned by root. Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the OL 8 system or platform. Additionally, Personally Identifiable Information (PII)
    SV-248557r779237_rule OL08-00-010240 CCI-001314 MEDIUM The OL 8 "/var/log" directory must have mode 0755 or less permissive. Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the OL 8 system or platform. Additionally, Personally Identifiable Information (PII)
    SV-248558r779240_rule OL08-00-010250 CCI-001314 MEDIUM The OL 8 "/var/log" directory must be owned by root. Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the OL 8 system or platform. Additionally, Personally Identifiable Information (PII)
    SV-248559r779243_rule OL08-00-010260 CCI-001314 MEDIUM The OL 8 "/var/log" directory must be group-owned by root. Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the OL 8 system or platform. Additionally, Personally Identifiable Information (PII)
    SV-248560r818614_rule OL08-00-010287 CCI-001453 MEDIUM The OL 8 SSH daemon must be configured to use system-wide crypto policies. Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access (e.g., RDP) is access to DoD nonpublic information systems by an authorized user (or an information system) communicating throu
    SV-248561r779249_rule OL08-00-010290 CCI-000877 MEDIUM The OL 8 SSH server must be configured to use only Message Authentication Codes (MACs) employing FIPS 140-2 validated cryptographic hash algorithms. Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access (e.g., RDP) is access to DoD nonpublic information systems by an authorized user (or an information system) communicating thr
    SV-248562r779252_rule OL08-00-010291 CCI-000877 MEDIUM The OL 8 SSH server must be configured to use only ciphers employing FIPS 140-2 validated cryptographic algorithms. Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied on to provide confidentiality or integrity, and DoD data may be compromised. Operating systems using encryption are requi
    SV-248563r779255_rule OL08-00-010292 CCI-000366 LOW The OL 8 SSH server must be configured to use strong entropy. The most important characteristic of a random number generator is its randomness, namely its ability to deliver random numbers that are impossible to predict. Entropy in computer security is associated with the unpredictability of a source of randomness.
    SV-248564r779258_rule OL08-00-010293 CCI-001453 MEDIUM The OL 8 operating system must implement DoD-approved encryption in the OpenSSL package. Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access (e.g., RDP) is access to DoD nonpublic information systems by an authorized user (or an information system) communicating thr
    SV-248565r818617_rule OL08-00-010294 CCI-001453 MEDIUM The OL 8 operating system must implement DoD-approved TLS encryption in the OpenSSL package. Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access (e.g., RDP) is access to DoD nonpublic information systems by an authorized user (or an information system) communicating thro
    SV-248566r818619_rule OL08-00-010295 CCI-001453 MEDIUM The OL 8 operating system must implement DoD-approved TLS encryption in the GnuTLS package. Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Transport Layer Security (TLS) encryption is a required security setting as a number of known vulnerabilities have been reported against Se
    SV-248567r818622_rule OL08-00-010300 CCI-001499 MEDIUM OL 8 system commands must have mode 755 or less permissive. If OL 8 were to allow any user to make changes to software libraries, those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to OL 8 with
    SV-248568r779270_rule OL08-00-010310 CCI-001499 MEDIUM OL 8 system commands must be owned by root. If OL 8 were to allow any user to make changes to software libraries, those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to OL 8 with
    SV-248569r818625_rule OL08-00-010320 CCI-001499 MEDIUM OL 8 system commands must be group-owned by root or a system account. If OL 8 were to allow any user to make changes to software libraries, those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to OL 8 with
    SV-248570r818628_rule OL08-00-010330 CCI-001499 MEDIUM OL 8 library files must have mode 755 or less permissive. If OL 8 were to allow any user to make changes to software libraries, those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to OL 8 with
    SV-248571r779279_rule OL08-00-010340 CCI-001499 MEDIUM OL 8 library files must be owned by root. If OL 8 were to allow any user to make changes to software libraries, those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to OL 8 with
    SV-248572r779282_rule OL08-00-010350 CCI-001499 MEDIUM OL 8 library files must be group-owned by root. If OL 8 were to allow any user to make changes to software libraries, those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to OL 8 with s
    SV-248573r779285_rule OL08-00-010360 CCI-001744 MEDIUM The OL 8 file integrity tool must notify the System Administrator (SA) when changes to the baseline configuration or anomalies in the operation of any security functions are discovered within an organizationally defined frequency. Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the operating system. Changes to operating system configurations can have unintended side effects, some of which may be
    SV-248574r779288_rule OL08-00-010370 CCI-001749 HIGH YUM must be configured to prevent the installation of patches, service packs, device drivers, or OL 8 system components that have not been digitally signed using a certificate that is recognized and approved by the organization. Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. Accordingly, patches, ser
    SV-248575r779291_rule OL08-00-010371 CCI-001749 HIGH OL 8 must prevent the installation of software, patches, service packs, device drivers, or operating system components of local packages without verification they have been digitally signed using a certificate that is issued by a Certificate Authority (CA) that is recognized and approved by the organization. Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. Accordingly, patches, ser
    SV-248576r833195_rule OL08-00-010372 CCI-001749 MEDIUM OL 8 must prevent the loading of a new kernel for later execution. Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. Disabling "kexec_load" pr
    SV-248577r833197_rule OL08-00-010373 CCI-002165 MEDIUM OL 8 must enable kernel parameters to enforce Discretionary Access Control (DAC) on symlinks. DAC is based on the notion that individual users are "owners" of objects and therefore have discretion over who should be authorized to access the object and in which mode (e.g., read or write). Ownership is usually acquired as a consequence of creating t
    SV-248578r833199_rule OL08-00-010374 CCI-002165 MEDIUM OL 8 must enable kernel parameters to enforce Discretionary Access Control (DAC) on hardlinks. DAC is based on the notion that individual users are "owners" of objects and therefore have discretion over who should be authorized to access the object and in which mode (e.g., read or write). Ownership is usually acquired as a consequence of creating t
    SV-248579r833201_rule OL08-00-010375 CCI-001090 LOW OL 8 must restrict access to the kernel message buffer. Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from bein
    SV-248580r833203_rule OL08-00-010376 CCI-001090 LOW OL 8 must prevent kernel profiling by unprivileged users. Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from bein
    SV-248581r833208_rule OL08-00-010380 CCI-002038 MEDIUM OL 8 must require users to provide a password for privilege escalation. Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the user reauthenticate. Satisfies: SRG-OS-
    SV-248582r779312_rule OL08-00-010381 CCI-002038 MEDIUM OL 8 must require users to reauthenticate for privilege escalation and changing roles. Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the user reauthenticate. Satisfies: SRG-OS-
    SV-248583r779315_rule OL08-00-010382 CCI-000366 MEDIUM OL 8 must restrict privilege elevation to authorized personnel. The sudo command allows a user to execute programs with elevated (administrator) privileges. It prompts the user for their password and confirms your request to execute a command by checking a file, called sudoers. If the "sudoers" file is not configured
    SV-248584r833210_rule OL08-00-010383 CCI-000366 MEDIUM OL 8 must use the invoking user's password for privilege escalation when using "sudo". The sudoers security policy requires that users authenticate themselves before they can use sudo. When sudoers requires authentication, it validates the invoking user's credentials. If the rootpw, targetpw, or runaspw flags are defined and not disabled, b
    SV-248585r833212_rule OL08-00-010384 CCI-002038 MEDIUM OL 8 must require re-authentication when using the "sudo" command. Without re-authentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the organization requires the user to re-a
    SV-248586r779324_rule OL08-00-010390 CCI-001948 LOW OL 8 must have the package required for multifactor authentication installed. Using an authentication device, such as a DoD Common Access Card (CAC) or token that is separate from the information system, ensures that even if the information system is compromised, credentials stored on the authentication device will not be affected.
    SV-248587r818644_rule OL08-00-010400 CCI-001948 MEDIUM OL 8 must implement certificate status checking for multifactor authentication. Using an authentication device, such as a DoD Common Access Card (CAC) or token that is separate from the information system, ensures that even if the information system is compromised, credentials stored on the authentication device will not be affected.
    SV-248588r779330_rule OL08-00-010410 CCI-001953 MEDIUM OL 8 must accept Personal Identity Verification (PIV) credentials. The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. The DoD has mandated the use of the Common Access Card (CAC) to support identity management and personal authentication for systems covered under Homela
    SV-248589r779333_rule OL08-00-010420 CCI-002824 MEDIUM OL 8 must implement non-executable data to protect its memory from unauthorized code execution. Some adversaries launch attacks with the intent of executing code in non-executable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory include, for example, data execution prevention and address sp
    SV-248590r779336_rule OL08-00-010421 CCI-001084 MEDIUM OL 8 must clear the page allocator to prevent use-after-free attacks. Adversaries may launch attacks with the intent of executing code in non-executable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory include, for example, data execution prevention and address spa
    SV-248591r779339_rule OL08-00-010422 CCI-001084 MEDIUM OL 8 must disable virtual syscalls. Syscalls are special routines in the Linux kernel, which userspace applications ask to do privileged tasks. Invoking a system call is an expensive operation because the processor must interrupt the currently executing task and switch context to kernel mod
    SV-248592r779342_rule OL08-00-010423 CCI-001084 MEDIUM OL 8 must clear SLUB/SLAB objects to prevent use-after-free attacks. Some adversaries launch attacks with the intent of executing code in non-executable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory include, for example, data execution prevention and address sp
    SV-248593r779345_rule OL08-00-010424 CCI-000366 MEDIUM OL 8 must not let Meltdown and Spectre exploit critical vulnerabilities in modern processors. Hardware vulnerabilities allow programs to steal data that is currently processed on the computer. While programs are typically not permitted to read data from other programs, a malicious program can exploit Meltdown and Spectre to obtain secrets stored i
    SV-248594r833214_rule OL08-00-010430 CCI-002824 MEDIUM OL 8 must implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution. Some adversaries launch attacks with the intent of executing code in non-executable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory include, for example, data execution prevention and address sp
    SV-248595r779351_rule OL08-00-010440 CCI-002617 LOW YUM must remove all software components after updated versions have been installed on OL 8. Previous versions of software components that are not removed from the information system after updates have been installed may be exploited by adversaries. Some information technology products may remove older versions of software automatically from the
    SV-248596r779354_rule OL08-00-010450 CCI-002696 MEDIUM OL 8 must enable the SELinux targeted policy. Without verification of the security functions, they may not operate correctly and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system securit
    SV-248597r779357_rule OL08-00-010460 CCI-000366 HIGH There must be no "shosts.equiv" files on the OL 8 operating system. The "shosts.equiv" files are used to configure host-based authentication for the system via SSH. Host-based authentication is not sufficient for preventing unauthorized access to the system, as it does not require interactive identification and authentica
    SV-248598r779360_rule OL08-00-010470 CCI-000366 HIGH There must be no ".shosts" files on the OL 8 operating system. The ".shosts" files are used to configure host-based authentication for individual users or the system via SSH. Host-based authentication is not sufficient for preventing unauthorized access to the system, as it does not require interactive identification
    SV-248599r779363_rule OL08-00-010471 CCI-000366 LOW OL 8 must enable the hardware random number generator entropy gatherer service. The most important characteristic of a random number generator is its randomness, namely its ability to deliver random numbers that are impossible to predict. Entropy in computer security is associated with the unpredictability of a source of randomness.
    SV-248600r779366_rule OL08-00-010472 CCI-000366 LOW OL 8 must have the packages required to use the hardware random number generator entropy gatherer service. The most important characteristic of a random number generator is its randomness, namely its ability to deliver random numbers that are impossible to predict. Entropy in computer security is associated with the unpredictability of a source of randomness.
    SV-248601r779369_rule OL08-00-010480 CCI-000366 MEDIUM The OL 8 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.
    SV-248602r779372_rule OL08-00-010490 CCI-000366 MEDIUM The OL 8 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.
    SV-248603r779375_rule OL08-00-010500 CCI-000366 MEDIUM The OL 8 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 on to the system as another user.
    SV-248604r779378_rule OL08-00-010510 CCI-000366 MEDIUM The OL 8 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.
    SV-248605r779381_rule OL08-00-010520 CCI-000366 MEDIUM The OL 8 SSH daemon must not allow authentication using known host's authentication. Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, even in the event of misconfiguration elsewhere.
    SV-248606r779384_rule OL08-00-010521 CCI-000366 MEDIUM The OL 8 SSH daemon must not allow Kerberos authentication, except to fulfill documented and validated mission requirements. Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, even in the event of misconfiguration elsewhere.
    SV-248607r779387_rule OL08-00-010522 CCI-000366 MEDIUM The OL 8 SSH daemon must not allow GSSAPI authentication, except to fulfill documented and validated mission requirements. Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, even in the event of misconfiguration elsewhere.
    SV-248608r779390_rule OL08-00-010540 CCI-000366 LOW OL 8 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.
    SV-248609r779393_rule OL08-00-010541 CCI-000366 LOW OL 8 must use a separate file system for "/var/log". The use of separate file systems for different paths can protect the system from failures resulting from a file system becoming full or failing.
    SV-248610r779396_rule OL08-00-010542 CCI-000366 LOW OL 8 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.
    SV-248611r779399_rule OL08-00-010543 CCI-000366 MEDIUM OL 8 must use a separate file system for "/tmp". The use of separate file systems for different paths can protect the system from failures resulting from a file system becoming full or failing.
    SV-248612r779402_rule OL08-00-010544 CCI-000366 MEDIUM OL 8 must use a separate file system for /var/tmp. The use of separate file systems for different paths can protect the system from failures resulting from a file system becoming full or failing.
    SV-248613r779405_rule OL08-00-010550 CCI-000770 MEDIUM OL 8 must not permit direct logons to the root account using remote access via SSH. Although the communications channel may be encrypted, an additional layer of security is gained by extending the policy of not logging on directly as root. In addition, logging on with a user-specific account provides individual accountability of actions
    SV-248615r779411_rule OL08-00-010561 CCI-000366 MEDIUM OL 8 must have the rsyslog service enabled and active. Configuring OL 8 to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across the DoD that reflects the most restrictive security posture
    SV-248616r779414_rule OL08-00-010570 CCI-000366 MEDIUM OL 8 must prevent files with the setuid and setgid bit set from being executed on file systems that contain user home directories. The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file s
    SV-248617r779417_rule OL08-00-010571 CCI-000366 MEDIUM OL 8 must prevent files with the setuid and setgid bit set from being executed on the /boot directory. The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file s
    SV-248618r818648_rule OL08-00-010572 CCI-000366 MEDIUM OL 8 must prevent files with the setuid and setgid bit set from being executed on the /boot/efi directory. The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file s
    SV-248619r779423_rule OL08-00-010580 CCI-000366 MEDIUM OL 8 must prevent special devices on non-root local partitions. The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for unprivileged users to attain unauthorized administrative
    SV-248620r779426_rule OL08-00-010590 CCI-000366 MEDIUM OL 8 file systems that contain user home directories must not execute binary files. The "noexec" mount option causes the system not to execute binary files. This option must be used for mounting any file system not containing approved binary files, as they may be incompatible. Executing files from untrusted file systems increases the opp
    SV-248621r779429_rule OL08-00-010600 CCI-000366 MEDIUM OL 8 file systems must not interpret character or block special devices from untrusted file systems. The "nodev" mount option causes the system not to interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for unprivileged users to attain unauthorized administrative
    SV-248622r779432_rule OL08-00-010610 CCI-000366 MEDIUM OL 8 file systems must not execute binary files on removable media. The "noexec" mount option causes the system not to execute binary files. This option must be used for mounting any file system not containing approved binary files, as they may be incompatible. Executing files from untrusted file systems increases the opp
    SV-248623r779435_rule OL08-00-010620 CCI-000366 MEDIUM OL 8 must prevent files with the setuid and setgid bit set from being executed on file systems that are used with removable media. The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file s
    SV-248624r779438_rule OL08-00-010630 CCI-000366 MEDIUM OL 8 file systems must not execute binary files that are imported via Network File System (NFS). The "noexec" mount option causes the system not to execute binary files. This option must be used for mounting any file system not containing approved binary as they may be incompatible. Executing files from untrusted file systems increases the opportunit
    SV-248625r779441_rule OL08-00-010640 CCI-000366 MEDIUM OL 8 file systems must not interpret character or block special devices that are imported via NFS. The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for unprivileged users to attain unauthorized administrative
    SV-248626r779444_rule OL08-00-010650 CCI-000366 MEDIUM OL 8 must prevent files with the setuid and setgid bit set from being executed on file systems that are imported via Network File System (NFS). The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file s
    SV-248627r779447_rule OL08-00-010660 CCI-000366 MEDIUM Local OL 8 initialization files must not execute world-writable programs. If user start-up files execute world-writable programs, especially in unprotected directories, they could be maliciously modified to destroy user files or otherwise compromise the system at the user level. If the system is compromised at the user level, i
    SV-248628r779450_rule OL08-00-010670 CCI-001665 MEDIUM OL 8 must disable kernel dumps unless needed. Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps may consume a considerable amount of disk space and may result in denial of service by exhausting the available space on the target file system pa
    SV-248629r833216_rule OL08-00-010671 CCI-000366 MEDIUM OL 8 must disable the "kernel.core_pattern". It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248630r779456_rule OL08-00-010672 CCI-000366 MEDIUM OL 8 must disable acquiring, saving, and processing core dumps. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248631r779459_rule OL08-00-010673 CCI-000366 MEDIUM OL 8 must disable core dumps for all users. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248632r779462_rule OL08-00-010674 CCI-000366 MEDIUM OL 8 must disable storing core dumps. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248633r779465_rule OL08-00-010675 CCI-000366 MEDIUM OL 8 must disable core dump backtraces. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248634r779468_rule OL08-00-010680 CCI-000366 MEDIUM For OL 8 systems using Domain Name Servers (DNS) resolution, at least two name servers must be configured. To provide availability for name resolution services, multiple redundant name servers are mandated. A failure in name resolution could lead to the failure of security functions requiring name resolution, which may include time synchronization, centralized
    SV-248635r779471_rule OL08-00-010690 CCI-000366 MEDIUM Executable search paths within the initialization files of all local interactive OL 8 users must only contain paths that resolve to the system default or the user's home directory. 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 (other than the user's home directory), executables in the
    SV-248636r779474_rule OL08-00-010700 CCI-000366 MEDIUM All OL 8 world-writable directories must be owned by root, sys, bin, or an application user. If a world-writable directory is not owned by root, sys, bin, or an application User Identifier (UID), unauthorized users may be able to modify files created by others. The only authorized public directories are the temporary directories supplied with
    SV-248637r779477_rule OL08-00-010710 CCI-000366 MEDIUM All OL 8 world-writable directories must be group-owned by root, sys, bin, or an application group. If a world-writable directory is not group-owned by root, sys, bin, or an application Group Identifier (GID), unauthorized users may be able to modify files created by others. The only authorized public directories are the temporary directories supplie
    SV-248638r779480_rule OL08-00-010720 CCI-000366 MEDIUM All OL 8 local interactive users must have a home directory assigned in the "/etc/passwd" file. If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files they should own.
    SV-248639r779483_rule OL08-00-010730 CCI-000366 MEDIUM All OL 8 local interactive user home directories must have mode "0750" or less permissive. Excessive permissions on local interactive user home directories may allow unauthorized access to user files by other users.
    SV-248640r779486_rule OL08-00-010731 CCI-000366 MEDIUM All OL 8 local interactive user home directory files must have mode "0750" or less permissive. Excessive permissions on local interactive user home directories may allow unauthorized access to user files by other users.
    SV-248641r779489_rule OL08-00-010740 CCI-000366 MEDIUM All OL 8 local interactive user home directories must be group-owned by the home directory owner's primary group. If the Group Identifier (GID) of a local interactive user’s home directory is not the same as the primary GID of the user, this would allow unauthorized access to the user’s files. Users that share the same group may not be able to access files to whi
    SV-248642r779492_rule OL08-00-010741 CCI-000366 MEDIUM OL 8 must be configured so that all files and directories contained in local interactive user home directories are group-owned by a group of which the home directory owner is a member. If a local interactive user's files are group-owned by a group of which the user is not a member, unintended users may be able to access them.
    SV-248643r779495_rule OL08-00-010750 CCI-000366 MEDIUM All OL 8 local interactive user home directories defined in the "/etc/passwd" file must exist. If a local interactive user has a home directory defined that does not exist, the user may be given access to the "/" directory as the current working directory upon logon. This could create a denial of service because the user would not be able to access
    SV-248644r779498_rule OL08-00-010760 CCI-000366 MEDIUM All OL 8 local interactive user accounts must be assigned a home directory upon creation. If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files they should own.
    SV-248645r779501_rule OL08-00-010770 CCI-000366 MEDIUM All OL 8 local initialization files must have mode "0740" or less permissive. Local initialization files are used to configure the user's shell environment upon logon. Malicious modification of these files could compromise accounts upon logon.
    SV-248646r779504_rule OL08-00-010780 CCI-000366 MEDIUM All OL 8 files and directories must have a valid owner. Unowned files and directories may be unintentionally inherited if a user is assigned the same User Identifier "UID" as the UID of the unowned files.
    SV-248647r779507_rule OL08-00-010790 CCI-000366 MEDIUM All OL 8 files and directories must have a valid group owner. Files without a valid group owner may be unintentionally inherited if a group is assigned the same Group Identifier (GID) as the GID of the files without a valid group owner.
    SV-248648r779510_rule OL08-00-010800 CCI-000366 MEDIUM A separate OL 8 filesystem must be used for user home directories (such as "/home" or an equivalent). The use of separate file systems for different paths can protect the system from failures resulting from a file system becoming full or failing.
    SV-248649r779513_rule OL08-00-010820 CCI-000366 HIGH Unattended or automatic logon via the OL 8 graphical user interface must not be allowed. Failure to restrict system access to authenticated users negatively impacts operating system security.
    SV-248650r779516_rule OL08-00-010830 CCI-000366 HIGH OL 8 must not allow users to override SSH environment variables. SSH environment options potentially allow users to bypass access restriction in some configurations.
    SV-248651r779519_rule OL08-00-020000 CCI-000016 MEDIUM OL 8 temporary user accounts must be provisioned with an expiration time of 72 hours or less. If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be used to gain unauthorized access. To mitigate this risk, automated termination of all temporary accounts must be set upon account creation.
    SV-248652r779522_rule OL08-00-020010 CCI-000044 MEDIUM OL 8 systems below version 8.2 must automatically lock an account when three unsuccessful logon attempts occur. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. OL 8 can use the "pam_faillock.so" for th
    SV-248653r779525_rule OL08-00-020011 CCI-000044 MEDIUM OL 8 systems, versions 8.2 and above, must automatically lock an account when three unsuccessful logon attempts occur. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. In OL 8.2, the "/etc/security/faillock.co
    SV-248654r779528_rule OL08-00-020012 CCI-000044 MEDIUM OL 8 systems below version 8.2 must automatically lock an account when three unsuccessful logon attempts occur during a 15-minute time period. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. OL 8 can use the "pam_faillock.so" for th
    SV-248655r779531_rule OL08-00-020013 CCI-000044 MEDIUM OL 8 systems, versions 8.2 and above, must automatically lock an account when three unsuccessful logon attempts occur during a 15-minute time period. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. In OL 8.2, the "/etc/security/faillock.co
    SV-248656r779534_rule OL08-00-020014 CCI-000044 MEDIUM OL 8 systems below version 8.2 must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. OL 8 can use the "pam_faillock.so" for th
    SV-248657r779537_rule OL08-00-020015 CCI-000044 MEDIUM OL 8 systems, versions 8.2 and above, must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. In OL 8.2, the "/etc/security/faillock.co
    SV-248658r779540_rule OL08-00-020016 CCI-000044 MEDIUM OL 8 systems below version 8.2 must ensure account lockouts persist. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. OL 8 can use the "pam_faillock.so" for th
    SV-248659r779543_rule OL08-00-020017 CCI-000044 MEDIUM OL 8 systems, versions 8.2 and above, must ensure account lockouts persist. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. In OL 8.2, the "/etc/security/faillock.co
    SV-248660r779546_rule OL08-00-020018 CCI-000044 MEDIUM OL 8 systems below version 8.2 must prevent system messages from being presented when three unsuccessful logon attempts occur. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. OL 8 can use the "pam_faillock.so" for th
    SV-248661r779549_rule OL08-00-020019 CCI-000044 MEDIUM OL 8 systems, versions 8.2 and above, must prevent system messages from being presented when three unsuccessful logon attempts occur. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. In OL 8.2, the "/etc/security/faillock.co
    SV-248662r779552_rule OL08-00-020020 CCI-000044 MEDIUM OL 8 systems below version 8.2 must log user name information when unsuccessful logon attempts occur. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. OL 8 can use the "pam_faillock.so" for th
    SV-248663r779555_rule OL08-00-020021 CCI-000044 MEDIUM OL 8 systems, versions 8.2 and above, must log user name information when unsuccessful logon attempts occur. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. In OL 8.2, the "/etc/security/faillock.co
    SV-248664r779558_rule OL08-00-020022 CCI-000044 MEDIUM OL 8 systems below version 8.2 must include root when automatically locking an account until the locked account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. OL 8 can use the "pam_faillock.so" for th
    SV-248665r779561_rule OL08-00-020023 CCI-000044 MEDIUM OL 8 systems, versions 8.2 and above, must include root when automatically locking an account until the locked account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. In OL 8.2, the "/etc/security/faillock.co
    SV-248666r779564_rule OL08-00-020024 CCI-000054 LOW OL 8 must limit the number of concurrent sessions to 10 for all accounts and/or account types. Operating system management includes the ability to control the number of users and user sessions that use an operating system. Limiting the number of allowed users and sessions per user is helpful in reducing the risks related to denial-of-service attack
    SV-248667r779567_rule OL08-00-020025 CCI-000044 MEDIUM OL 8 must configure the use of the pam_faillock.so module in the /etc/pam.d/system-auth file. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. In OL 8.2 the "/etc/security/faillock.conf"
    SV-248668r779570_rule OL08-00-020026 CCI-000044 MEDIUM OL 8 must configure the use of the pam_faillock.so module in the /etc/pam.d/password-auth file. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. In OL 8.2 the "/etc/security/faillock.conf"
    SV-248669r779573_rule OL08-00-020027 CCI-000044 MEDIUM OL 8 systems, versions 8.2 and above, must configure SELinux context type to allow the use of a non-default faillock tally directory. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. From "faillock.conf" man pages: Note that t
    SV-248670r779576_rule OL08-00-020028 CCI-000044 MEDIUM OL 8 systems below version 8.2 must configure SELinux context type to allow the use of a non-default faillock tally directory. By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. From "Pam_Faillock" man pages: Note that th
    SV-248671r779579_rule OL08-00-020030 CCI-000056 MEDIUM OL 8 must enable a user session lock until that user reestablishes access using established identification and authentication procedures for graphical user sessions. To establish acceptance of the application usage policy, a click-through banner at system logon is required. The system must prevent further activity until the user executes a positive action to manifest agreement by clicking on a box indicating "OK". Sa
    SV-248672r779582_rule OL08-00-020031 CCI-000057 MEDIUM OL 8 must initiate a session lock for graphical user interfaces when the screensaver is activated. A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user t
    SV-248673r779585_rule OL08-00-020032 CCI-000366 MEDIUM OL 8 must disable the user list at logon for graphical user interfaces. Leaving the user list enabled is a security risk since it allows anyone with physical access to the system to enumerate known user accounts without authenticated access to the system.
    SV-248674r779588_rule OL08-00-020039 CCI-000056 MEDIUM OL 8 must have the tmux package installed. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented a
    SV-248675r779591_rule OL08-00-020040 CCI-000056 MEDIUM OL 8 must enable a user session lock until that user re-establishes access using established identification and authentication procedures for command line sessions. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented a
    SV-248676r818653_rule OL08-00-020041 CCI-000056 MEDIUM OL 8 must ensure session control is automatically started at shell initialization. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented a
    SV-248677r779597_rule OL08-00-020042 CCI-000056 LOW OL 8 must prevent users from disabling session control mechanisms. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented a
    SV-248678r779600_rule OL08-00-020043 CCI-000056 MEDIUM OL 8 must enable a user session lock until that user reestablishes access using established identification and authentication procedures for command line sessions. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented
    SV-248679r818655_rule OL08-00-020050 CCI-000056 MEDIUM OL 8 must be able to initiate directly a session lock for all connection types using smartcard when the smartcard is removed. A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented
    SV-248680r779606_rule OL08-00-020060 CCI-000057 MEDIUM OL 8 must automatically lock graphical user sessions after 15 minutes of inactivity. A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user t
    SV-248681r779609_rule OL08-00-020070 CCI-000057 MEDIUM OL 8 must automatically lock command line user sessions after 15 minutes of inactivity. Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminat
    SV-248682r779612_rule OL08-00-020080 CCI-000057 MEDIUM OL 8 must prevent a user from overriding the session lock-delay setting for the graphical user interface. A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user t
    SV-248683r779615_rule OL08-00-020081 CCI-000057 MEDIUM OL 8 must prevent a user from overriding the session idle-delay setting for the graphical user interface. A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user t
    SV-248684r779618_rule OL08-00-020082 CCI-000057 MEDIUM OL 8 must prevent a user from overriding the session lock-enabled setting for the graphical user interface. A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user t
    SV-248685r779621_rule OL08-00-020090 CCI-000187 MEDIUM OL 8 must map the authenticated identity to the user or group account for PKI-based authentication. Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the individual user or group will not be available for forensic analysis. There are various methods of mapping certificates to user/group
    SV-248686r818658_rule OL08-00-020100 CCI-000366 MEDIUM OL 8 must ensure the password complexity module is enabled in the password-auth file. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Use of "pw
    SV-248687r833220_rule OL08-00-020110 CCI-000192 LOW OL 8 must enforce password complexity by requiring that at least one uppercase character be used. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Passwor
    SV-248688r833222_rule OL08-00-020120 CCI-000193 LOW OL 8 must enforce password complexity by requiring that at least one lowercase character be used. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Passwor
    SV-248689r833224_rule OL08-00-020130 CCI-000194 LOW OL 8 must enforce password complexity by requiring that at least one numeric character be used. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Passwor
    SV-248690r833226_rule OL08-00-020140 CCI-000195 MEDIUM OL 8 must require the maximum number of repeating characters of the same character class be limited to four when passwords are changed. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Passwor
    SV-248691r833228_rule OL08-00-020150 CCI-000195 MEDIUM OL 8 must require the maximum number of repeating characters be limited to three when passwords are changed. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Passwor
    SV-248692r833230_rule OL08-00-020160 CCI-000195 MEDIUM OL 8 must require the change of at least four character classes when passwords are changed. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Passwor
    SV-248693r833232_rule OL08-00-020170 CCI-000195 LOW OL 8 must require the change of at least 8 characters when passwords are changed. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Passwor
    SV-248694r779648_rule OL08-00-020180 CCI-000198 MEDIUM OL 8 passwords for new users or password changes must have a 24 hours/1 day minimum password lifetime restriction in "/etc/shadow". Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, the password could be repeatedly c
    SV-248695r779651_rule OL08-00-020190 CCI-000198 MEDIUM OL 8 passwords for new users or password changes must have a 24 hours/1 day minimum password lifetime restriction in "/etc/logins.def". Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, the password could be repeatedly c
    SV-248696r779654_rule OL08-00-020200 CCI-000199 MEDIUM OL 8 user account passwords must have a 60-day maximum password lifetime restriction. Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If OL 8 does not limit the lifetime of passwords and force users to change their passwords, there is the risk that OL 8 passwords could b
    SV-248697r779657_rule OL08-00-020210 CCI-000199 MEDIUM OL 8 user account passwords must be configured so that existing passwords are restricted to a 60-day maximum lifetime. Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If OL 8 does not limit the lifetime of passwords and force users to change their passwords, there is the risk that OL 8 passwords could b
    SV-248698r818663_rule OL08-00-020220 CCI-000200 LOW OL 8 must be configured in the password-auth file to prohibit password reuse for a minimum of five generations. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to reuse their password consecutively when that password
    SV-248699r833234_rule OL08-00-020230 CCI-000205 MEDIUM OL 8 passwords must have a minimum of 15 characters. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password length is one factor of several that helps to determine strength and how long it takes to crack a passwor
    SV-248700r779666_rule OL08-00-020231 CCI-000205 MEDIUM OL 8 passwords for new users must have a minimum of 15 characters. The shorter the password, the lower the number of possible combinations that need to be tested before the password is compromised. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and b
    SV-248701r779669_rule OL08-00-020240 CCI-000135 MEDIUM OL 8 duplicate User IDs (UIDs) must not exist for interactive users. To ensure accountability and prevent unauthenticated access, interactive users must be identified and authenticated to prevent potential misuse and compromise of the system. Interactive users include organizational employees or individuals the organiza
    SV-248702r779672_rule OL08-00-020250 CCI-000765 MEDIUM OL 8 must implement multifactor authentication for access to interactive accounts. Using an authentication device, such as a Common Access Card (CAC) or token that is separate from the information system, ensures that even if the information system is compromised, that compromise will not affect credentials stored on the authentication
    SV-248703r779675_rule OL08-00-020260 CCI-000795 MEDIUM The OL 8 system-auth file must disable access to the system for account identifiers (individuals, groups, roles, and devices) with 35 days of inactivity. Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potentially obtain undetected access to the system. Owners of inactive accounts will not notice if unauthorized access to their user acco
    SV-248704r779678_rule OL08-00-020261 CCI-000795 MEDIUM The OL 8 password-auth file must disable access to the system for account identifiers (individuals, groups, roles, and devices) with 35 days of inactivity. Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potentially obtain undetected access to the system. Owners of inactive accounts will not notice if unauthorized access to their user acco
    SV-248705r779681_rule OL08-00-020262 CCI-001314 MEDIUM The OL 8 lastlog command must have a mode of "0750" or less permissive. Unauthorized disclosure of the contents of the /var/log/lastlog file can reveal system data to attackers, thus compromising its confidentiality.
    SV-248706r779684_rule OL08-00-020263 CCI-001314 MEDIUM The OL 8 lastlog command must be owned by root. Unauthorized disclosure of the contents of the /var/log/lastlog file can reveal system data to attackers, thus compromising its confidentiality.
    SV-248707r779687_rule OL08-00-020264 CCI-001314 MEDIUM The OL 8 lastlog command must be group-owned by root. Unauthorized disclosure of the contents of the /var/log/lastlog file can reveal system data to attackers, thus compromising its confidentiality.
    SV-248708r779690_rule OL08-00-020270 CCI-001682 MEDIUM OL 8 emergency accounts must be automatically removed or disabled after the crisis is resolved or within 72 hours. Emergency accounts are privileged accounts established in response to crisis situations where the need for rapid account activation is required. Therefore, emergency account activation may bypass normal account authorization processes. If these accounts a
    SV-248709r833236_rule OL08-00-020280 CCI-001619 LOW All OL 8 passwords must contain at least one special character. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Passwor
    SV-248710r779696_rule OL08-00-020290 CCI-002007 MEDIUM OL 8 must prohibit the use of cached authentications after one day. If cached authentication information is out of date, the validity of the authentication information may be questionable. OL 8 includes multiple options for configuring authentication, but this requirement will focus on the System Security Services Daem
    SV-248711r833238_rule OL08-00-020300 CCI-000366 MEDIUM OL 8 must prevent the use of dictionary words for passwords. If OL 8 allows the user to select passwords based on dictionary words, this increases the chances of password compromise by increasing the opportunity for successful guesses and brute-force attacks.
    SV-248712r779702_rule OL08-00-020310 CCI-000366 MEDIUM OL 8 must enforce a delay of at least four seconds between logon prompts following a failed logon attempt. Configuring the operating system to implement organization-wide security implementation guides and security checklists verifies compliance with federal standards and establishes a common security baseline across the DoD that reflects the most restrictive
    SV-248713r779705_rule OL08-00-020320 CCI-000366 MEDIUM OL 8 must not have unnecessary accounts. Accounts providing no operational purpose provide additional opportunities for system compromise. Unnecessary accounts include user accounts for individuals not requiring access to the system and application accounts for applications not installed on the
    SV-248714r779708_rule OL08-00-020330 CCI-000366 HIGH OL 8 must not allow accounts configured with blank or null passwords. If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments.
    SV-248715r779711_rule OL08-00-020331 CCI-000366 HIGH OL 8 must not allow blank or null passwords in the system-auth file. If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments.
    SV-248716r779714_rule OL08-00-020332 CCI-000366 HIGH OL 8 must not allow blank or null passwords in the password-auth file. If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments.
    SV-248717r779717_rule OL08-00-020340 CCI-000366 LOW OL 8 must display the date and time of the last successful account logon upon logon. Providing users with feedback on when account accesses last occurred facilitates user recognition and reporting of unauthorized account use.
    SV-248718r779720_rule OL08-00-020350 CCI-000366 MEDIUM OL 8 must display the date and time of the last successful account logon upon an SSH logon. Providing users with feedback on when account accesses via SSH last occurred facilitates user recognition and reporting of unauthorized account use.
    SV-248719r779723_rule OL08-00-020351 CCI-000366 MEDIUM OL 8 default permissions must be defined in such a way that all authenticated users can read and modify only their own files. Setting the most restrictive default permissions ensures that when new accounts are created, they do not have unnecessary access.
    SV-248720r779726_rule OL08-00-020352 CCI-000366 MEDIUM OL 8 must set the umask value to 077 for all local interactive user accounts. The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typi
    SV-248721r818666_rule OL08-00-020353 CCI-000366 MEDIUM OL 8 must define default permissions for logon and non-logon shells. The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typi
    SV-248722r779732_rule OL08-00-030000 CCI-002233 MEDIUM The OL 8 audit system must be configured to audit the execution of privileged functions and prevent all software from executing at higher privilege levels than users executing the software. Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts
    SV-248723r779735_rule OL08-00-030010 CCI-000366 MEDIUM Cron logging must be implemented in OL 8. 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.
    SV-248724r779738_rule OL08-00-030020 CCI-000139 MEDIUM The OL 8 System Administrator (SA) and Information System Security Officer (ISSO) (at a minimum) must be alerted of an audit processing failure event. It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an impending failure of the audit capability, and system oper
    SV-248725r779741_rule OL08-00-030030 CCI-000139 MEDIUM The OL 8 Information System Security Officer (ISSO) and System Administrator (SA) (at a minimum) must have mail aliases to be notified of an audit processing failure. It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an impending failure of the audit capability, and system oper
    SV-248726r779744_rule OL08-00-030040 CCI-000140 MEDIUM The OL 8 System must take appropriate action when an audit processing failure occurs. It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an impending failure of the audit capability, and system oper
    SV-248728r779750_rule OL08-00-030060 CCI-000140 MEDIUM The OL 8 audit system must take appropriate action when the audit storage volume is full. It is critical that when OL 8 is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors; failures in the audit capturing mechanisms; and audit storage capac
    SV-248729r779753_rule OL08-00-030061 CCI-000366 MEDIUM The OL 8 audit system must audit local events. Without establishing what type of events occurred, the source of events, where events occurred, and the outcome of events, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content t
    SV-248730r779756_rule OL08-00-030062 CCI-001851 MEDIUM OL 8 must label all offloaded audit logs before sending them to the central log server. Without establishing what type of events occurred and their source, location, and outcome, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be necessary to satisf
    SV-248731r779759_rule OL08-00-030063 CCI-000366 MEDIUM OL 8 must resolve audit information before writing to disk. Without establishing what type of events occurred and their source, location, and outcome, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be necessary to satisf
    SV-248732r779762_rule OL08-00-030070 CCI-000162 MEDIUM OL 8 audit logs must have a mode of "0600" or less permissive to prevent unauthorized read access. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-248733r779765_rule OL08-00-030080 CCI-000162 MEDIUM OL 8 audit logs must be owned by root to prevent unauthorized read access. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-248734r779768_rule OL08-00-030090 CCI-000162 MEDIUM OL 8 audit logs must be group-owned by root to prevent unauthorized read access. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-248735r779771_rule OL08-00-030100 CCI-000162 MEDIUM The OL 8 audit log directory must be owned by root to prevent unauthorized read access. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-248736r779774_rule OL08-00-030110 CCI-000162 MEDIUM The OL 8 audit log directory must be group-owned by root to prevent unauthorized read access. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-248737r779777_rule OL08-00-030120 CCI-000162 MEDIUM The OL 8 audit log directory must have a mode of 0700 or less permissive to prevent unauthorized read access. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-248738r779780_rule OL08-00-030121 CCI-000162 MEDIUM The OL 8 audit system must protect auditing rules from unauthorized change. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-248739r779783_rule OL08-00-030122 CCI-000162 MEDIUM The OL 8 audit system must protect logon UIDs from unauthorized change. Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfull
    SV-248740r779786_rule OL08-00-030130 CCI-000018 MEDIUM OL 8 must generate audit records for all account creation events that affect "/etc/shadow". Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248741r779789_rule OL08-00-030140 CCI-000018 MEDIUM OL 8 must generate audit records for all account creation events that affect "/etc/security/opasswd". Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248742r779792_rule OL08-00-030150 CCI-000018 MEDIUM OL 8 must generate audit records for all account creation events that affect "/etc/passwd". Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248743r779795_rule OL08-00-030160 CCI-000018 MEDIUM OL 8 must generate audit records for all account creation events that affect "/etc/gshadow". Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248744r779798_rule OL08-00-030170 CCI-000018 MEDIUM OL 8 must generate audit records for all account creation events that affect "/etc/group". Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248745r779801_rule OL08-00-030171 CCI-000018 MEDIUM OL 8 must generate audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers". Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248746r779804_rule OL08-00-030172 CCI-000018 MEDIUM OL 8 must generate audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers.d/". Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248747r779807_rule OL08-00-030190 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "su" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248748r818669_rule OL08-00-030200 CCI-000130 MEDIUM The OL 8 audit system must be configured to audit any use of the "setxattr", "fsetxattr", "lsetxattr", "removexattr", "fremovexattr", and "lremovexattr" system calls. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248753r779825_rule OL08-00-030250 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "chage" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248754r779828_rule OL08-00-030260 CCI-000130 MEDIUM OL 8 must generate audit records for any uses of the "chcon" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248756r779834_rule OL08-00-030280 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "ssh-agent" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248757r779837_rule OL08-00-030290 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "passwd" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248758r779840_rule OL08-00-030300 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "mount" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248759r779843_rule OL08-00-030301 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "umount" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248760r779846_rule OL08-00-030302 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "mount" syscall. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248761r779849_rule OL08-00-030310 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "unix_update" command. Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit tra
    SV-248762r779852_rule OL08-00-030311 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "postdrop" command. Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trail
    SV-248763r779855_rule OL08-00-030312 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "postqueue" command. Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trail
    SV-248764r779858_rule OL08-00-030313 CCI-000169 MEDIUM OL 8 must generate audit records for any use of the "semanage" command. Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trail
    SV-248765r779861_rule OL08-00-030314 CCI-000169 MEDIUM OL 8 must generate audit records for any use of the "setfiles" command. Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trail
    SV-248766r779864_rule OL08-00-030315 CCI-000169 MEDIUM OL 8 must generate audit records for any use of the "userhelper" command. Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trail
    SV-248767r779867_rule OL08-00-030316 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "setsebool" command. Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trail
    SV-248768r779870_rule OL08-00-030317 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "unix_chkpwd" command. Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trail
    SV-248769r779873_rule OL08-00-030320 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "ssh-keysign" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248770r779876_rule OL08-00-030330 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "setfacl" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248771r779879_rule OL08-00-030340 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "pam_timestamp_check" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248772r779882_rule OL08-00-030350 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "newgrp" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248773r818672_rule OL08-00-030360 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "init_module" and "finit_module" system calls. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248774r818675_rule OL08-00-030361 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "rename", "unlink", "rmdir", "renameat", and "unlinkat" system calls. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit recor
    SV-248779r779903_rule OL08-00-030370 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "gpasswd" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248781r779909_rule OL08-00-030390 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the delete_module syscall. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248782r779912_rule OL08-00-030400 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "crontab" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248783r779915_rule OL08-00-030410 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "chsh" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248784r818678_rule OL08-00-030420 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248790r818681_rule OL08-00-030480 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "chown", "fchown", "fchownat", and "lchown" system calls. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248791r818684_rule OL08-00-030490 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "chmod", "fchmod", and "fchmodat" system calls. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248797r779957_rule OL08-00-030550 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "sudo" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248798r779960_rule OL08-00-030560 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "usermod" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248799r779963_rule OL08-00-030570 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "chacl" command. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248800r779966_rule OL08-00-030580 CCI-000130 MEDIUM OL 8 must generate audit records for any use of the "kmod" command. Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the
    SV-248801r779969_rule OL08-00-030590 CCI-000130 MEDIUM OL 8 must generate audit records for any attempted modifications to the "faillock" log file. Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the
    SV-248802r779972_rule OL08-00-030600 CCI-000130 MEDIUM OL 8 must generate audit records for any attempted modifications to the "lastlog" file. Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the
    SV-248803r779975_rule OL08-00-030601 CCI-000130 MEDIUM OL 8 must enable auditing of processes that start prior to the audit daemon. Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the
    SV-248804r779978_rule OL08-00-030602 CCI-000130 LOW OL 8 must allocate an "audit_backlog_limit" of sufficient size to capture processes that start prior to the audit daemon. Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. If auditing is enabled late in the startup process, the actions o
    SV-248805r779981_rule OL08-00-030603 CCI-000172 MEDIUM OL 8 must enable Linux audit logging for the USBGuard daemon. Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit rec
    SV-248806r779984_rule OL08-00-030610 CCI-000171 MEDIUM OL 8 must allow only the Information System Security Manager (ISSM) (or individuals or roles appointed by the ISSM) to select which auditable events are to be audited. Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming
    SV-248807r779987_rule OL08-00-030620 CCI-001493 MEDIUM OL 8 audit tools must have a mode of "0755" or less permissive. Protecting audit information includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. OL 8 systems providing tools to inte
    SV-248808r779990_rule OL08-00-030630 CCI-001493 MEDIUM OL 8 audit tools must be owned by root. Protecting audit information includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. OL 8 systems providing tools to inte
    SV-248809r779993_rule OL08-00-030640 CCI-001493 MEDIUM OL 8 audit tools must be group-owned by root. Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. OL 8 systems providing tools to
    SV-248810r833241_rule OL08-00-030650 CCI-001496 MEDIUM OL 8 must use cryptographic mechanisms to protect the integrity of audit tools. Protecting the integrity of the tools used for auditing purposes is a critical step toward ensuring the integrity of audit information. Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfu
    SV-248811r818686_rule OL08-00-030660 CCI-001849 MEDIUM OL 8 must allocate audit record storage capacity to store at least one week of audit records when audit records are not immediately sent to a central audit record storage facility. To ensure OL 8 systems have a sufficient storage capacity in which to write the audit logs, OL 8 needs to be able to allocate audit record storage capacity. The task of allocating audit record storage capacity is usually performed during initial instal
    SV-248812r780002_rule OL08-00-030670 CCI-000366 MEDIUM OL 8 must have the packages required for offloading audit logs installed. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. OL 8 installation media provides "rsyslogd". This is a sy
    SV-248813r780005_rule OL08-00-030680 CCI-000366 MEDIUM OL 8 must have the packages required for encrypting offloaded audit logs installed. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. OL 8 installation media provides "rsyslogd". This is a sy
    SV-248814r780008_rule OL08-00-030690 CCI-001851 MEDIUM The OL 8 audit records must be offloaded onto a different system or storage media from the system being audited. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. OL 8 installation media provides "rsyslogd". This is a sy
    SV-248815r780011_rule OL08-00-030700 CCI-001851 MEDIUM OL 8 must take appropriate action when the internal event queue is full. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. OL 8 installation media provides "rsyslogd". This is a sy
    SV-248816r818688_rule OL08-00-030710 CCI-001851 MEDIUM OL 8 must encrypt the transfer of audit records offloaded onto a different system or media from the system being audited. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. OL 8 installation media provides "rsyslogd". This is a sy
    SV-248817r780017_rule OL08-00-030720 CCI-001851 MEDIUM OL 8 must authenticate the remote logging server for offloading audit logs. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. OL 8 installation media provides "rsyslogd". This is a sy
    SV-248818r780020_rule OL08-00-030730 CCI-001855 MEDIUM OL 8 must take action when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity. If security personnel are not notified immediately when storage volume reaches 75 percent utilization, they are unable to plan for audit record storage capacity expansion.
    SV-248819r780023_rule OL08-00-030731 CCI-001855 MEDIUM OL 8 must notify the System Administrator (SA) and Information System Security Officer (ISSO) (at a minimum) when allocated audit record storage volume 75 percent utilization. If security personnel are not notified immediately when storage volume reaches 75 percent utilization, they are unable to plan for audit record storage capacity expansion.
    SV-248820r780026_rule OL08-00-030740 CCI-001890 MEDIUM OL 8 must compare internal information system clocks at least every 24 hours with a server synchronized to an authoritative time source, such as the United States Naval Observatory (USNO) time servers, or a time server designated for the appropriate DoD network (NIPRNet/SIPRNet), and/or the Global Positioning System (GPS). Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. S
    SV-248821r780029_rule OL08-00-030741 CCI-000381 LOW OL 8 must disable the chrony daemon from acting as a server. Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. S
    SV-248822r780032_rule OL08-00-030742 CCI-000381 LOW OL 8 must disable network management of the chrony daemon. Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. S
    SV-248823r780035_rule OL08-00-040000 CCI-000381 HIGH OL 8 must not have the telnet-server package installed. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248824r780038_rule OL08-00-040001 CCI-000381 MEDIUM OL 8 must not have any automated bug reporting tools installed. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248825r780041_rule OL08-00-040002 CCI-000381 MEDIUM OL 8 must not have the sendmail package installed. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248826r780044_rule OL08-00-040004 CCI-000381 LOW OL 8 must enable mitigations against processor-based vulnerabilities. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248827r780047_rule OL08-00-040010 CCI-000381 HIGH OL 8 must not have the rsh-server package installed. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248828r818691_rule OL08-00-040020 CCI-000381 MEDIUM OL 8 must cover or disable the built-in or attached camera when not in use. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248829r780053_rule OL08-00-040021 CCI-000366 MEDIUM OL 8 must not have the asynchronous transfer mode (ATM) kernel module installed if not required for operational support. The ATM is a transport layer protocol designed for digital transmission of multiple types of traffic, including telephony (voice), data, and video signals, in one network without the use of separate overlay networks. Disabling ATM protects the system aga
    SV-248830r780056_rule OL08-00-040022 CCI-000366 MEDIUM OL 8 must not have the Controller Area Network (CAN) kernel module installed if not required for operational support. The CAN protocol is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other's applications without a host computer. Disabling CAN protects the system against exploitation of any flaws in its implementati
    SV-248831r780059_rule OL08-00-040023 CCI-000366 MEDIUM OL 8 must not have the stream control transmission protocol (SCTP) kernel module installed if not required for operational support. The SCTP is a transport layer protocol, designed to support the idea of message-oriented communication, with several streams of messages within one connection. Disabling SCTP protects the system against exploitation of any flaws in its implementation.
    SV-248832r818694_rule OL08-00-040024 CCI-000381 LOW OL 8 must disable the transparent inter-process communication (TIPC) protocol. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248833r780065_rule OL08-00-040025 CCI-000381 LOW OL 8 must disable mounting of cramfs. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248834r780068_rule OL08-00-040026 CCI-000381 LOW OL 8 must disable IEEE 1394 (FireWire) Support. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248835r780071_rule OL08-00-040030 CCI-000382 MEDIUM OL 8 must be configured to prohibit or restrict the use of functions, ports, protocols, and/or services as defined in the Ports, Protocols, and Services Management (PPSM) Category Assignments List (CAL) and vulnerability assessments. To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/proto
    SV-248836r780074_rule OL08-00-040070 CCI-000778 MEDIUM The OL 8 file system automounter must be disabled unless required. Verify the operating system disables the ability to automount devices. Determine if automounter service is active with the following command: $ sudo systemctl status autofs autofs.service - Automounts filesystems on demand Loaded: loaded (/usr/l
    SV-248837r818697_rule OL08-00-040080 CCI-000778 MEDIUM OL 8 must be configured to disable the ability to use USB mass storage devices. USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity.
    SV-248839r818699_rule OL08-00-040090 CCI-002314 MEDIUM An OL 8 firewall must employ a deny-all, allow-by-exception policy for allowing connections to other systems. Failure to restrict network connectivity only to authorized systems permits inbound connections from malicious systems. It also permits outbound connections that may facilitate exfiltration of DoD data. OL 8 incorporates the "firewalld" daemon, which a
    SV-248840r780086_rule OL08-00-040100 CCI-002314 MEDIUM A firewall must be installed on OL 8. "Firewalld" provides an easy and effective way to block/limit remote access to the system via ports, services, and protocols. Remote access services, such as those providing remote access to network devices and information systems, which lack automated c
    SV-248841r780089_rule OL08-00-040101 CCI-002314 MEDIUM A firewall must be active on OL 8. "Firewalld" provides an easy and effective way to block/limit remote access to the system via ports, services, and protocols. Remote access services, such as those providing remote access to network devices and information systems, which lack automated c
    SV-248842r780092_rule OL08-00-040110 CCI-001443 MEDIUM OL 8 wireless network adapters must be disabled. Without protection of communications with wireless peripherals, confidentiality and integrity may be compromised because unprotected communications can be intercepted and read, altered, or used to compromise the OL 8 operating system. This requirement
    SV-248843r833244_rule OL08-00-040111 CCI-001443 MEDIUM OL 8 Bluetooth must be disabled. Without protection of communications with wireless peripherals, confidentiality and integrity may be compromised because unprotected communications can be intercepted and read, altered, or used to compromise the OL 8 operating system. This requirement
    SV-248844r780098_rule OL08-00-040120 CCI-001764 MEDIUM OL 8 must mount "/dev/shm" with the "nodev" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248845r780101_rule OL08-00-040121 CCI-001764 MEDIUM OL 8 must mount "/dev/shm" with the "nosuid" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248846r780104_rule OL08-00-040122 CCI-001764 MEDIUM OL 8 must mount "/dev/shm" with the "noexec" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248847r780107_rule OL08-00-040123 CCI-001764 MEDIUM OL 8 must mount "/tmp" with the "nodev" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248848r780110_rule OL08-00-040124 CCI-001764 MEDIUM OL 8 must mount "/tmp" with the "nosuid" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248849r780113_rule OL08-00-040125 CCI-001764 MEDIUM OL 8 must mount "/tmp" with the "noexec" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248850r780116_rule OL08-00-040126 CCI-001764 MEDIUM OL 8 must mount "/var/log" with the "nodev" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248851r780119_rule OL08-00-040127 CCI-001764 MEDIUM OL 8 must mount "/var/log" with the "nosuid" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248852r780122_rule OL08-00-040128 CCI-001764 MEDIUM OL 8 must mount "/var/log" with the "noexec" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248853r780125_rule OL08-00-040129 CCI-001764 MEDIUM OL 8 must mount "/var/log/audit" with the "nodev" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248854r780128_rule OL08-00-040130 CCI-001764 MEDIUM OL 8 must mount "/var/log/audit" with the "nosuid" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248855r780131_rule OL08-00-040131 CCI-001764 MEDIUM OL 8 must mount "/var/log/audit" with the "noexec" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248856r780134_rule OL08-00-040132 CCI-001764 MEDIUM OL 8 must mount "/var/tmp" with the "nodev" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248857r780137_rule OL08-00-040133 CCI-001764 MEDIUM OL 8 must mount "/var/tmp" with the "nosuid" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248858r780140_rule OL08-00-040134 CCI-001764 MEDIUM OL 8 must mount "/var/tmp" with the "noexec" option. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248859r780143_rule OL08-00-040135 CCI-001764 MEDIUM The OL 8 "fapolicy" module must be installed. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248860r780146_rule OL08-00-040136 CCI-001764 MEDIUM The OL 8 "fapolicy" module must be enabled. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248861r818702_rule OL08-00-040137 CCI-001764 MEDIUM The OL 8 fapolicy module must be configured to employ a deny-all, permit-by-exception policy to allow the execution of authorized software programs. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whiteli
    SV-248862r780152_rule OL08-00-040139 CCI-001958 MEDIUM OL 8 must have the USBGuard installed. Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Peripherals include but are not limited to such devices as flash drives, external storage, and printers. A new feature that O
    SV-248863r780155_rule OL08-00-040140 CCI-001958 MEDIUM OL 8 must block unauthorized peripherals before establishing a connection. Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Peripherals include but are not limited to such devices as flash drives, external storage, and printers. A new feature that O
    SV-248864r780158_rule OL08-00-040141 CCI-001958 MEDIUM OL 8 must enable the USBGuard. Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Peripherals include but are not limited to such devices as flash drives, external storage, and printers. A new feature that O
    SV-248865r780161_rule OL08-00-040150 CCI-001095 MEDIUM A firewall must be able to protect against or limit the effects of denial-of-service (DoS) attacks by ensuring OL 8 can implement rate-limiting measures on impacted network interfaces. DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. This requirement addresses the configuration of OL 8 to mitigate the
    SV-248866r780164_rule OL08-00-040159 CCI-002418 MEDIUM All OL 8 networked systems must have SSH installed. Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and read or altered. This requirement applies to both internal and external networks and all type
    SV-248867r780167_rule OL08-00-040160 CCI-002418 MEDIUM All OL 8 networked systems must have and implement SSH to protect the confidentiality and integrity of transmitted and received information, as well as information during preparation for transmission. Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and read or altered. This requirement applies to both internal and external networks and all type
    SV-248868r780170_rule OL08-00-040161 CCI-000068 MEDIUM OL 8 must force a frequent session key renegotiation for SSH connections to the server. Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied on to provide confidentiality or integrity, and DoD data may be compromised. Operating systems using encryption are requi
    SV-248869r833246_rule OL08-00-040170 CCI-000366 HIGH The x86 Ctrl-Alt-Delete key sequence must be disabled on OL 8. A locally logged-on user, who presses Ctrl-Alt-Delete when at the console, can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of system availability due to uni
    SV-248870r780176_rule OL08-00-040171 CCI-000366 HIGH The x86 Ctrl-Alt-Delete key sequence in OL 8 must be disabled if a graphical user interface is installed. A locally logged-on user, who presses Ctrl-Alt-Delete, when at the console, can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due t
    SV-248871r780179_rule OL08-00-040172 CCI-000366 MEDIUM OL 8 must disable the systemd Ctrl-Alt-Delete burst key sequence. A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to u
    SV-248872r780182_rule OL08-00-040180 CCI-000366 LOW OL 8 must disable the debug-shell systemd service. The debug-shell requires no authentication and provides root privileges to anyone who has physical access to the machine. While this feature is disabled by default, masking it adds a layer of assurance that it will not be enabled via a dependency in "syst
    SV-248873r780185_rule OL08-00-040190 CCI-000366 HIGH The Trivial File Transfer Protocol (TFTP) server package must not be installed if not required for OL 8 operational support. If TFTP is required for operational support (such as the transmission of router configurations) its use must be documented with the Information System Security Officer (ISSO), restricted to only authorized personnel, and have access control rules establis
    SV-248874r780188_rule OL08-00-040200 CCI-000366 HIGH The root account must be the only account having unrestricted access to the OL 8 system. If an account other than root also has a User Identifier (UID) of "0", it has root authority, giving that account unrestricted access to the entire operating system. Multiple accounts with a UID of "0" afford an opportunity for potential intruders to gues
    SV-248875r833248_rule OL08-00-040209 CCI-000366 MEDIUM OL 8 must prevent IPv4 Internet Control Message Protocol (ICMP) redirect messages from being accepted. 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-mi
    SV-248876r833250_rule OL08-00-040210 CCI-000366 MEDIUM OL 8 must prevent IPv6 Internet Control Message Protocol (ICMP) redirect messages from being accepted. 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-mi
    SV-248877r833252_rule OL08-00-040220 CCI-000366 MEDIUM OL 8 must not send Internet Control Message Protocol (ICMP) redirects. ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages contain information from the system's route table, possibly revealing portions of the network topology. There are no
    SV-248878r833254_rule OL08-00-040230 CCI-000366 MEDIUM OL 8 must not respond to Internet Control Message Protocol (ICMP) echoes sent to a broadcast address. Responding to broadcast ICMP echoes facilitates network mapping and provides a vector for amplification attacks. There are notable differences between Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6). IPv6 does not implement th
    SV-248879r833256_rule OL08-00-040239 CCI-000366 MEDIUM OL 8 must not forward IPv4 source-routed packets. Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the forwarding of
    SV-248880r833258_rule OL08-00-040240 CCI-000366 MEDIUM OL 8 must not forward IPv6 source-routed packets. Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the forwarding of
    SV-248881r833260_rule OL08-00-040249 CCI-000366 MEDIUM OL 8 must not forward IPv4 source-routed packets by default. Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the forwarding of
    SV-248882r833262_rule OL08-00-040250 CCI-000366 MEDIUM OL 8 must not forward IPv6 source-routed packets by default. Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the forwarding of
    SV-248883r833266_rule OL08-00-040260 CCI-000366 MEDIUM OL 8 must not enable IPv6 packet forwarding unless the system is a router. Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this software is used when not required, system network information may be unnecessarily transmitted across the network. The sysctl --s
    SV-248884r833268_rule OL08-00-040261 CCI-000366 MEDIUM OL 8 must not accept router advertisements on all IPv6 interfaces. Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this software is used when not required, system network information may be unnecessarily transmitted across the network. An illicit r
    SV-248885r833270_rule OL08-00-040262 CCI-000366 MEDIUM OL 8 must not accept router advertisements on all IPv6 interfaces by default. Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this software is used when not required, system network information may be unnecessarily transmitted across the network. An illicit r
    SV-248886r833272_rule OL08-00-040270 CCI-000366 MEDIUM OL 8 must not allow interfaces to perform Internet Control Message Protocol (ICMP) redirects by default. 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. There are not
    SV-248887r833274_rule OL08-00-040279 CCI-000366 MEDIUM OL 8 must ignore IPv4 Internet Control Message Protocol (ICMP) redirect messages. ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages modify the host's route table and are unauthenticated. An illicit ICMP redirect message could result in a man-in-the-mi
    SV-248888r833276_rule OL08-00-040280 CCI-000366 MEDIUM OL 8 must ignore IPv6 Internet Control Message Protocol (ICMP) redirect messages. ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. These messages modify the host's route table and are unauthenticated. An illicit ICMP redirect message could result in a man-in-the-mi
    SV-248889r833278_rule OL08-00-040281 CCI-000366 MEDIUM OL 8 must disable access to the network "bpf" syscall from unprivileged processes. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248890r833280_rule OL08-00-040282 CCI-000366 MEDIUM OL 8 must restrict the use of "ptrace" to descendant processes. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248891r833282_rule OL08-00-040283 CCI-000366 MEDIUM OL 8 must restrict exposed kernel pointer addresses access. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248892r833284_rule OL08-00-040284 CCI-000366 MEDIUM OL 8 must disable the use of user namespaces. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248893r833286_rule OL08-00-040285 CCI-000366 MEDIUM OL 8 must use reverse path filtering on all IPv4 interfaces. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248894r833288_rule OL08-00-040286 CCI-000366 MEDIUM OL 8 must enable hardening for the Berkeley Packet Filter Just-in-time compiler. It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the ri
    SV-248895r780251_rule OL08-00-040290 CCI-000366 MEDIUM OL 8 must be configured to prevent unrestricted mail relaying. If unrestricted mail relaying is permitted, unauthorized senders could use this host as a mail relay to send spam or for other unauthorized activity.
    SV-248896r780254_rule OL08-00-040300 CCI-000366 LOW The OL 8 file integrity tool must be configured to verify extended attributes. Extended attributes in file systems are used to contain arbitrary data and file metadata with security implications. OL 8 installation media come with a file integrity tool, Advanced Intrusion Detection Environment (AIDE).
    SV-248897r780257_rule OL08-00-040310 CCI-000366 LOW The OL 8 file integrity tool must be configured to verify Access Control Lists (ACLs). ACLs can provide permissions beyond those permitted through the file mode and must be verified by file integrity tools. OL 8 installation media come with a file integrity tool, Advanced Intrusion Detection Environment (AIDE).
    SV-248898r780260_rule OL08-00-040320 CCI-000366 MEDIUM The graphical display manager must not be installed on OL 8 unless approved. Internet services that are not required for system or application processes must not be active to decrease the attack surface of the system. X Windows has a long history of security vulnerabilities and will not be used unless approved and documented.
    SV-248899r780263_rule OL08-00-040330 CCI-000366 MEDIUM OL 8 network interfaces must not be in promiscuous mode. Network interfaces in promiscuous mode allow for the capture of all network traffic visible to the system. If unauthorized individuals can access these applications, it may allow them to collect information such as logon IDs, passwords, and key exchanges
    SV-248900r780266_rule OL08-00-040340 CCI-000366 MEDIUM OL 8 remote X connections for interactive users must be disabled unless to fulfill documented and validated mission requirements. The security risk of using X11 forwarding is that the client's X11 display server may be exposed to attack when the SSH client requests forwarding. A System Administrator may have a stance in which they want to protect clients that may expose themselves t
    SV-248901r780269_rule OL08-00-040341 CCI-000366 MEDIUM The OL 8 SSH daemon must prevent remote hosts from connecting to the proxy display. When X11 forwarding is enabled, there may be additional exposure to the server and client displays if the sshd proxy display is configured to listen on the wildcard address. By default, sshd binds the forwarding server to the loopback address and sets the
    SV-248902r780272_rule OL08-00-040350 CCI-000366 MEDIUM If the Trivial File Transfer Protocol (TFTP) server is required, the OL 8 TFTP daemon must be configured to operate in secure mode. Restricting TFTP to a specific directory prevents remote users from copying, transferring, or overwriting system files.
    SV-248903r780275_rule OL08-00-040360 CCI-000366 HIGH A File Transfer Protocol (FTP) server package must not be installed unless mission essential on OL 8. The FTP service provides an unencrypted remote access that 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 compro
    SV-248904r780278_rule OL08-00-040370 CCI-000366 MEDIUM OL 8 must not have the "gssproxy" package installed if not required for operational support. Verify the operating system is configured to disable non-essential capabilities. The most secure way of ensuring a non-essential capability is disabled is to not have the capability installed. When an application uses Generic Security Services API (GSS
    SV-248905r780281_rule OL08-00-040380 CCI-000366 MEDIUM OL 8 must not have the "iprutils" package installed if not required for operational support. The "iprutils" package provides a suite of utilities to manage and configure IBM Power Linux RAID Adapters supported by the IPR SCSI storage device driver. Disabling the "iprutils" package protects the system against exploitation of any flaws in its imple
    SV-248906r780284_rule OL08-00-040390 CCI-000366 MEDIUM OL 8 must not have the "tuned" package installed if not required for operational support. "Tuned" is a daemon that uses "udev" to monitor connected devices and statically and dynamically tunes system settings according to a selected profile. Disabling the "tuned" package protects the system against exploitation of any flaws in its implementati
    SV-248907r780287_rule OL08-00-040400 CCI-002235 MEDIUM OL 8 must prevent non-privileged users from executing privileged functions, including disabling, circumventing, or altering implemented security safeguards/countermeasures. Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges. Privileged functions include, for example, establishing accounts
    SV-252650r818746_rule OL08-00-010121 CCI-000366 HIGH The OL 8 operating system must not have accounts configured with blank or null passwords. If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments.
    SV-252651r818749_rule OL08-00-010331 CCI-001499 MEDIUM OL 8 library directories must have mode 755 or less permissive. If OL 8 were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to OL 8 w
    SV-252652r818752_rule OL08-00-010341 CCI-001499 MEDIUM OL 8 library directories must be owned by root. If OL 8 were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to OL 8 w
    SV-252653r818755_rule OL08-00-010351 CCI-001499 MEDIUM OL 8 library directories must be group-owned by root or a system account. If OL 8 were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to OL 8 w
    SV-252654r818758_rule OL08-00-010359 CCI-002696 MEDIUM The OL 8 operating system must use a file integrity tool to verify correct operation of all security functions. Without verification of the security functions, security functions may not operate correctly, and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the
    SV-252655r833205_rule OL08-00-010379 CCI-000366 MEDIUM OL 8 must specify the default "include" directory for the /etc/sudoers file. The "sudo" command allows authorized users to run programs (including shells) as other users, system users, and root. The "/etc/sudoers" file is used to configure authorized "sudo" users as well as the programs they are allowed to run. Some configuration
    SV-252656r818764_rule OL08-00-010385 CCI-002038 MEDIUM The OL 8 operating system must not be configured to bypass password requirements for privilege escalation. Without re-authentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the user re-authenticate. Satisfies: SRG-
    SV-252657r818767_rule OL08-00-020101 CCI-000366 MEDIUM OL 8 must ensure the password complexity module is enabled in the system-auth file. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. "pwquality
    SV-252658r818770_rule OL08-00-020102 CCI-000366 MEDIUM OL 8 systems below version 8.4 must ensure the password complexity module in the system-auth file is configured for three retries or less. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. "pwquality
    SV-252659r818773_rule OL08-00-020103 CCI-000366 MEDIUM OL 8 systems below version 8.4 must ensure the password complexity module in the password-auth file is configured for three retries or less. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. "pwquality
    SV-252660r833218_rule OL08-00-020104 CCI-000366 MEDIUM OL 8 systems, version 8.4 and above, must ensure the password complexity module is configured for three retries or less. Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. "pwquality
    SV-252661r818789_rule OL08-00-020221 CCI-000200 MEDIUM OL 8 must be configured in the system-auth file to prohibit password reuse for a minimum of five generations. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to reuse their password consecutively when that password
    SV-252662r833264_rule OL08-00-040259 CCI-000366 MEDIUM OL 8 must not enable IPv4 packet forwarding unless the system is a router. Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this software is used when not required, system network information may be unnecessarily transmitted across the network. The sysctl --s
    SV-252663r818785_rule OL08-00-040321 CCI-000366 MEDIUM The graphical display manager must not be the default target on OL 8 unless approved. Internet services that are not required for system or application processes must not be active to decrease the attack surface of the system. Graphical display managers have a long history of security vulnerabilities and must not be used, unless approved a