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: V1R6

Published: 2023-03-06

Updated At: 2023-05-04 00:37:04

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Rule	Version	CCI	Severity	Title	Description
SV-248519r853745_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-248520r853746_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-248524r877398_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-248525r853748_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-248526r858561_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-248531r860907_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-248533r877397_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-248534r877397_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-248535r880546_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-248552r860908_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-248553r860909_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-248560r877394_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-248561r877395_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-248562r877395_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-248564r877394_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-248565r877394_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-248566r877394_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-248573r902806_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-248574r877463_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-248575r877463_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-248576r877463_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-248577r860911_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-248578r860912_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-248579r858617_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-248580r858619_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-248581r860915_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-248582r880551_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-248584r880554_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-248585r880557_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-248586r853767_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-248587r860917_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-248588r853769_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-248589r853770_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-248594r860918_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-248595r853773_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-248596r853774_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-248602r880541_rule	OL08-00-010490	CCI-000366	MEDIUM	The OL 8 SSH private host key files must have mode "0640" or less permissive.	If an unauthorized user obtains the private SSH host key file, the host could be impersonated.
SV-248603r858568_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-248605r858572_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-248606r858574_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-248607r858576_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-248608r902793_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-248609r902795_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-248612r902797_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-248613r858578_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-248629r858629_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-248641r880567_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-248648r902800_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-248649r877377_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-248650r877377_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-248652r853775_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-248653r853776_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-248654r853777_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-248655r853778_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-248656r853779_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-248657r853780_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-248658r853781_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-248659r853782_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-248660r853783_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-248661r853784_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-248662r853785_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-248663r853786_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-248664r853787_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-248665r853788_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-248666r877399_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-248667r853789_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-248668r853790_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-248669r853791_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-248670r853792_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-248675r902786_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-248676r880538_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-248685r858606_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-248686r902809_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-248687r858631_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-248688r858633_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-248689r858635_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-248690r858637_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-248691r858639_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-248692r858641_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-248693r858643_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-248695r858592_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/login.defs".	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-248698r902821_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-248699r858645_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-248708r902791_rule	OL08-00-020270	CCI-001682	MEDIUM	OL 8 must automatically expire temporary accounts within 72 hours.	Temporary accounts are privileged or nonprivileged accounts that are established during pressing circumstances, such as new software or hardware configuration or an incident response, where the need for prompt account activation requires bypassing normal
SV-248709r858647_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-248710r853793_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-248711r858649_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-248714r858582_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-248717r858591_rule	OL08-00-020340	CCI-000052	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-248718r858584_rule	OL08-00-020350	CCI-000052	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-248720r858597_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-248722r853794_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-248730r877390_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-248740r853796_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-248741r853797_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-248742r853798_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-248743r853799_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-248744r853800_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-248745r853801_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-248746r853802_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-248747r853803_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-248748r853804_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-248753r853805_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-248754r853806_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-248756r853807_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-248757r853808_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-248758r853809_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-248759r853810_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-248760r853811_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-248761r853812_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-248762r853813_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-248763r853814_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-248767r853815_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-248768r853816_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-248769r853817_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-248770r853818_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-248771r853819_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-248772r853820_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-248773r853821_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-248774r853822_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-248779r853823_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-248781r853824_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-248782r853825_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-248783r853826_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-248784r853827_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-248790r853828_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-248791r853829_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-248797r853830_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-248798r853831_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-248799r853832_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-248800r853833_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-248801r853834_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-248802r853835_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-248803r853836_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-248804r853837_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-248810r880559_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-248811r877391_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-248814r877390_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-248815r877390_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-248816r877390_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-248817r877390_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-248818r877389_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-248819r877389_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-248820r877038_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-248839r853846_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-248840r853847_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-248841r853848_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-248842r853849_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-248843r860921_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-248844r853853_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-248845r853854_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-248846r853855_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-248847r853856_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-248848r853857_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-248849r853858_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-248850r853859_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-248851r853860_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-248852r853861_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-248853r853862_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-248854r853863_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-248855r853864_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-248856r853865_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-248857r853866_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-248858r853867_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-248859r853868_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-248860r853869_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-248861r860922_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-248862r853871_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-248863r853872_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-248864r853873_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-248865r902788_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-248866r853875_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-248867r853876_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-248868r877398_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-248875r858651_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-248876r858653_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-248877r858655_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-248878r858657_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-248879r858659_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-248880r858661_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-248881r858663_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-248882r858665_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-248883r858669_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-248884r858671_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-248885r858673_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-248886r858675_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-248887r858677_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-248888r858679_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-248889r858681_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-248890r858683_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-248891r858685_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-248892r858687_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-248893r858689_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-248894r858691_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-248897r880561_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-248900r858588_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-248901r858590_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-248907r877392_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-252654r880573_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-252655r880549_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-252656r854184_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-252657r902812_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-252658r902815_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-252659r902818_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-252660r858600_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-252661r902824_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-252662r858667_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
SV-255898r880544_rule	OL08-00-040342	CCI-001453	MEDIUM	OL 8 SSH server must be configured to use only FIPS-validated key exchange algorithms.	Without cryptographic integrity protections provided by FIPS-validated cryptographic algorithms, information can be viewed and altered by unauthorized users without detection. OL 8 incorporates system-wide crypto policies by default. The SSH configuratio
SV-256978r902784_rule	OL08-00-010019	CCI-001749	MEDIUM	OL 8 must ensure cryptographic verification of vendor software packages.	Cryptographic verification of vendor software packages ensures that all software packages are obtained from a valid source and protects against spoofing that could lead to installation of malware on the system. Oracle cryptographically signs all software
SV-256979r902803_rule	OL08-00-010358	CCI-001744	MEDIUM	OL 8 must be configured to allow sending email notifications of unauthorized configuration changes to designated personnel.	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

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Oracle Linux 8 Security Technical Implementation Guide

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