| V-260539 | High | Ubuntu 22.04 LTS must disable the x86 Ctrl-Alt-Delete key sequence 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... |
| V-260483 | High | Ubuntu 22.04 LTS must not have the "telnet" package installed. | It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities are often overlooked and... |
| V-260482 | High | Ubuntu 22.04 LTS 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... |
| V-260470 | High | Ubuntu 22.04 LTS, when booted, must require authentication upon booting into single-user and maintenance modes. | To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DOD-approved PKIs, all DOD systems (e.g., web servers and web portals) must... |
| V-260571 | High | Ubuntu 22.04 LTS 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 must never be used in operational environments. |
| V-260570 | High | Ubuntu 22.04 LTS 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 must never be used in operational environments. |
| V-260579 | High | Ubuntu 22.04 LTS 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. |
| V-260523 | High | Ubuntu 22.04 LTS must have SSH installed. | Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered.
This... |
| V-260469 | High | Ubuntu 22.04 LTS must disable the x86 Ctrl-Alt-Delete 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... |
| V-260559 | High | Ubuntu 22.04 LTS must ensure only users who need access to security functions are part of sudo group. | An isolation boundary provides access control and protects the integrity of the hardware, software, and firmware that perform security functions.
Security functions are the hardware,... |
| V-260529 | High | Ubuntu 22.04 LTS must be configured so that remote X connections are 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... |
| V-260650 | High | Ubuntu 22.04 LTS must implement NIST FIPS-validated cryptography to protect classified information and for the following: To provision digital signatures, to generate cryptographic hashes, and to protect unclassified information requiring confidentiality and cryptographic protection in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards. | Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The operating system must implement cryptographic modules adhering to the higher... |
| V-260524 | High | Ubuntu 22.04 LTS must use SSH to protect the confidentiality and integrity of transmitted information. | Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered.
This... |
| V-260526 | High | Ubuntu 22.04 LTS must not allow unattended or automatic login via SSH. | Failure to restrict system access to authenticated users negatively impacts Ubuntu 22.04 LTS security. |
| V-260649 | Medium | Ubuntu 22.04 LTS must generate audit records for privileged activities, nonlocal maintenance, diagnostic sessions and other system-level access. | If events associated with nonlocal administrative access or diagnostic sessions are not logged, a major tool for assessing and investigating attacks would not be available.
This requirement... |
| V-260648 | Medium | Ubuntu 22.04 LTS must prevent all software from executing at higher privilege levels than users executing the software and the audit system must be configured to audit the execution of privileged functions. | In certain situations, software applications/programs need to execute with elevated privileges to perform required functions. However, if the privileges required for execution are at a higher... |
| V-260641 | Medium | Ubuntu 22.04 LTS must generate audit records for the /var/log/btmp file. | Without generating audit records 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... |
| V-260640 | Medium | Ubuntu 22.04 LTS must generate audit records for all events that affect the systemd journal files. | Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to modify system... |
| V-260643 | Medium | Ubuntu 22.04 LTS must generate audit records for the /var/run/utmp file. | Without generating audit records 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... |
| V-260642 | Medium | Ubuntu 22.04 LTS must generate audit records for the /var/log/wtmp file. | Without generating audit records 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... |
| V-260645 | Medium | Ubuntu 22.04 LTS must generate audit records for the use and modification of the lastlog file. | Without generating audit records 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... |
| V-260644 | Medium | Ubuntu 22.04 LTS must generate audit records for the use and modification of faillog file. | Without generating audit records 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... |
| V-260647 | Medium | Ubuntu 22.04 LTS must generate audit records when successful/unsuccessful attempts to modify the /etc/sudoers.d directory occur. | Without generating audit records 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... |
| V-260646 | Medium | Ubuntu 22.04 LTS must generate audit records when successful/unsuccessful attempts to modify the /etc/sudoers file occur. | Without generating audit records 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... |
| V-260538 | Medium | Ubuntu 22.04 LTS must initiate a graphical session lock after 15 minutes of inactivity. | 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... |
| V-260533 | Medium | Ubuntu 22.04 LTS 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.
The system will... |
| V-260532 | Medium | Ubuntu 22.04 LTS must configure the SSH daemon to use Message Authentication Codes (MACs) employing FIPS 140-3-approved cryptographic hashes to prevent the unauthorized disclosure of information and/or detect changes to information during transmission. | 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... |
| V-260531 | Medium | Ubuntu 22.04 LTS must configure the SSH daemon to use FIPS 140-3-approved ciphers to prevent the unauthorized disclosure of information and/or detect changes to information during transmission. | 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... |
| V-260530 | Medium | Ubuntu 22.04 LTS 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... |
| V-260537 | Medium | Ubuntu 22.04 LTS must retain a user's session lock until that user reestablishes access using established identification and authentication procedures. | 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... |
| V-260536 | Medium | Ubuntu 22.04 LTS must display the Standard Mandatory DOD Notice and Consent Banner before granting local access to the system via a graphical user logon. | Display of a standardized and approved use notification before granting access to Ubuntu 22.04 LTS ensures privacy and security notification verbiage used is consistent with applicable federal... |
| V-260535 | Medium | Ubuntu 22.04 LTS must enable the graphical user logon banner to display the Standard Mandatory DOD Notice and Consent Banner before granting local access to the system via a graphical user logon. | Display of a standardized and approved use notification before granting access to Ubuntu 22.04 LTS ensures privacy and security notification verbiage used is consistent with applicable federal... |
| V-260534 | Medium | Ubuntu 22.04 LTS must use strong authenticators in establishing nonlocal maintenance and diagnostic sessions. | Nonlocal maintenance and diagnostic activities are those activities conducted by individuals communicating through a network, either an external network (e.g., the internet) or an internal... |
| V-260489 | Medium | Ubuntu 22.04 LTS must generate error messages that provide information necessary for corrective actions without revealing information that could be exploited by adversaries. | Any operating system providing too much information in error messages risks compromising the data and security of the structure, and content of error messages needs to be carefully considered by... |
| V-260488 | Medium | Ubuntu 22.04 LTS must configure the "/var/log" directory to have mode "755" 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 operating system or... |
| V-260487 | Medium | Ubuntu 22.04 LTS library files must have mode "755" or less permissive. | If the operating system 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... |
| V-260486 | Medium | Ubuntu 22.04 LTS must have system commands set to a mode of "755" or less permissive. | If Ubuntu 22.04 LTS 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... |
| V-260485 | Medium | Ubuntu 22.04 LTS must have directories that contain system commands set to a mode of "755" or less permissive. | 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... |
| V-260484 | Medium | Ubuntu 22.04 LTS must implement cryptographic mechanisms to prevent unauthorized disclosure and modification of all information that requires protection at rest. | Operating systems handling data requiring "data at rest" protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest.
... |
| V-260586 | Medium | Ubuntu 22.04 LTS 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... |
| V-260584 | Medium | Ubuntu 22.04 LTS must notify designated personnel if baseline configurations are changed in an unauthorized manner. The file integrity tool must notify the system administrator when changes to the baseline configuration or anomalies in the operation of any security functions are discovered. | 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... |
| V-260585 | Medium | Ubuntu 22.04 LTS must be configured so that the script that runs each 30 days or less to check file integrity is the default. | 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... |
| V-260582 | Medium | Ubuntu 22.04 LTS 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... |
| V-260583 | Medium | Ubuntu 22.04 LTS must configure AIDE to perform file integrity checking on the file system. | 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... |
| V-260580 | Medium | Ubuntu 22.04 LTS must use DOD PKI-established certificate authorities for verification of the establishment of protected sessions. | Untrusted certificate authorities (CA) can issue certificates, but they may be issued by organizations or individuals that seek to compromise DOD systems or by organizations with insufficient... |
| V-260634 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses of the chown, fchown, fchownat, and lchown system calls. | Without generating audit records 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... |
| V-260635 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses of the creat, open, openat, open_by_handle_at, truncate, and ftruncate system calls. | Without generating audit records 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... |
| V-260636 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses of the delete_module system call. | Without generating audit records 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... |
| V-260637 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260630 | Medium | Ubuntu 22.04 LTS must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/opasswd. | Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an... |
| V-260631 | Medium | Ubuntu 22.04 LTS must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/passwd. | Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an... |
| V-260588 | Medium | Ubuntu 22.04 LTS must be configured to preserve log records from failure events. | Failure to a known state can address safety or security in accordance with the mission/business needs of the organization. Failure to a known secure state helps prevent a loss of confidentiality,... |
| V-260589 | Medium | Ubuntu 22.04 LTS must monitor remote access methods. | 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... |
| V-260508 | Medium | Ubuntu 22.04 LTS must configure the "/var/log" directory to 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 operating system or... |
| V-260509 | Medium | Ubuntu 22.04 LTS must configure the "/var/log" directory to be group-owned by "syslog". | 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 operating system or... |
| V-260506 | Medium | Ubuntu 22.04 LTS must be configured so that the "journalctl" command is 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 operating system or... |
| V-260507 | Medium | Ubuntu 22.04 LTS must configure audit tools to be 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... |
| V-260504 | Medium | Ubuntu 22.04 LTS must configure the files used by the system journal to be group-owned by "systemd-journal". | 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 operating system or... |
| V-260505 | Medium | Ubuntu 22.04 LTS must be configured so that the "journalctl" command is 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 operating system or... |
| V-260502 | Medium | Ubuntu 22.04 LTS must configure the directories used by the system journal to be group-owned by "systemd-journal". | 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 operating system or... |
| V-260503 | Medium | Ubuntu 22.04 LTS must configure the files used by the system journal to 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 operating system or... |
| V-260500 | Medium | Ubuntu 22.04 LTS library files must be group-owned by "root". | If the operating system 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... |
| V-260501 | Medium | Ubuntu 22.04 LTS must configure the directories used by the system journal to 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 operating system or... |
| V-260478 | Medium | Ubuntu 22.04 LTS must have the "libpam-pwquality" package installed. | 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... |
| V-260629 | Medium | Ubuntu 22.04 LTS must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/gshadow. | Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an... |
| V-260628 | Medium | Ubuntu 22.04 LTS must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/group. | Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an... |
| V-260627 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260626 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses of the unix_update 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... |
| V-260625 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260624 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses of the sudoedit 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... |
| V-260623 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260622 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260621 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260620 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260511 | Medium | Ubuntu 22.04 LTS must configure the "/var/log/syslog" file to be group-owned by "adm". | 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 operating system or... |
| V-260510 | Medium | Ubuntu 22.04 LTS must configure "/var/log/syslog" file to be owned by "syslog". | 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 operating system or... |
| V-260513 | Medium | Ubuntu 22.04 LTS must set a sticky bit on all 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... |
| V-260512 | Medium | Ubuntu 22.04 LTS must be configured so that the "journalctl" command is not accessible by unauthorized users. | Any operating system providing too much information in error messages risks compromising the data and security of the structure, and content of error messages needs to be carefully considered by... |
| V-260515 | Medium | Ubuntu 22.04 LTS must enable and run the Uncomplicated Firewall (ufw). | Remote access services, such as those providing remote access to network devices and information systems, which lack automated control capabilities, increase risk and make remote user access... |
| V-260514 | Medium | Ubuntu 22.04 LTS must have an application firewall installed in order to control remote access methods. | Remote access services, such as those providing remote access to network devices and information systems, which lack automated control capabilities, increase risk and make remote user access... |
| V-260517 | Medium | Ubuntu 22.04 LTS must configure the Uncomplicated Firewall (ufw) to rate-limit impacted network interfaces. | Denial of service (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... |
| V-260516 | Medium | Ubuntu 22.04 LTS must have an application firewall enabled. | Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls limit which applications are allowed to communicate over the network. |
| V-260518 | Medium | Ubuntu 22.04 LTS must be configured to prohibit or restrict the use of functions, ports, protocols, and/or services, as defined in the PPSM 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... |
| V-260471 | Medium | Ubuntu 22.04 LTS must initiate session audits at system startup. | If auditing is enabled late in the startup process, the actions of some startup processes may not be audited. Some audit systems also maintain state information only available if auditing is... |
| V-260612 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260613 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful attempts to use the kmod 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... |
| V-260610 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260611 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful attempts to use the fdisk 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... |
| V-260616 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260617 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260614 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful attempts to use modprobe 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... |
| V-260615 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260618 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260619 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260564 | Medium | Ubuntu 22.04 LTS must prevent the use of dictionary words for passwords. | If Ubuntu 22.04 LTS allows the user to select passwords based on dictionary words, then this increases the chances of password compromise by increasing the opportunity for successful guesses and... |
| V-260565 | Medium | Ubuntu 22.04 LTS must enforce a minimum 15-character password length. | 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... |
| V-260566 | Medium | Ubuntu 22.04 LTS must require the change of at least eight characters when passwords are changed. | If the operating system allows the user to consecutively reuse extensive portions of passwords, this increases the chances of password compromise by increasing the window of opportunity for... |
| V-260567 | Medium | Ubuntu 22.04 LTS must be configured so that when passwords are changed or new passwords are established, pwquality must 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... |
| V-260560 | Medium | Ubuntu 22.04 LTS must enforce password complexity by requiring 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... |
| V-260561 | Medium | Ubuntu 22.04 LTS must enforce password complexity by requiring 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... |
| V-260562 | Medium | Ubuntu 22.04 LTS 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... |
| V-260563 | Medium | Ubuntu 22.04 LTS must enforce password complexity by requiring that at least one special 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... |
| V-260569 | Medium | Ubuntu 22.04 LTS must store only encrypted representations of passwords. | 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... |
| V-260599 | Medium | Ubuntu 22.04 LTS must permit only authorized groups ownership of the audit log files. | 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... |
| V-260598 | Medium | Ubuntu 22.04 LTS must be configured to permit only authorized users ownership of the audit log files. | 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... |
| V-260591 | Medium | Ubuntu 22.04 LTS must produce audit records and reports containing information to establish when, where, what type, the source, and the outcome for all DOD-defined auditable events and actions in near real time. | Without establishing the when, where, type, source, and outcome of events that occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or... |
| V-260590 | Medium | Ubuntu 22.04 LTS must have the "auditd" package installed. | Without establishing the when, where, type, source, and outcome of events that occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or... |
| V-260594 | Medium | Ubuntu 22.04 LTS must shut down by default upon audit failure. | It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include: software/hardware... |
| V-260597 | Medium | Ubuntu 22.04 LTS must be configured so that audit log files are not read- or write-accessible by unauthorized users. | 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... |
| V-260605 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260604 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses of the apparmor_parser command. | Without generating audit records 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... |
| V-260607 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful 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... |
| V-260606 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260601 | Medium | Ubuntu 22.04 LTS must be configured so that audit configuration files are not write-accessible by unauthorized users. | Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events.
... |
| V-260600 | Medium | Ubuntu 22.04 LTS must be configured so that the audit log directory is not write-accessible by unauthorized users. | If audit information were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve.
To ensure the... |
| V-260603 | Medium | Ubuntu 22.04 LTS must permit only authorized groups to own the audit configuration files. | Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events.
... |
| V-260602 | Medium | Ubuntu 22.04 LTS must permit only authorized accounts to own the audit configuration files. | Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events.
... |
| V-260609 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses 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... |
| V-260608 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses of the chfn 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... |
| V-260577 | Medium | Ubuntu 22.04 LTS, for PKI-based authentication, must validate certificates by constructing a certification path (which includes status information) to an accepted trust anchor. | Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate not already explicitly trusted.
A trust anchor is an authoritative... |
| V-260576 | Medium | Ubuntu 22.04 LTS must electronically verify personal identity verification (PIV) credentials. | The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access.
DOD has mandated the use of the common access card (CAC) to support identity management and... |
| V-260575 | Medium | Ubuntu 22.04 LTS must implement smart card logins for multifactor authentication for local and network access to privileged and nonprivileged accounts. | Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased.
Multifactor authentication requires using two or more factors to achieve... |
| V-260574 | Medium | Ubuntu 22.04 LTS must accept personal identity verification (PIV) credentials. | The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access.
DOD has mandated the use of the common access card (CAC) to support identity management and... |
| V-260573 | Medium | Ubuntu 22.04 LTS must implement multifactor authentication for remote access to privileged accounts in such a way that one of the factors is provided by a device separate from the system gaining access. | Using an authentication device, such as a CAC or token separate from the information system, ensures that even if the information system is compromised, that compromise will not affect credentials... |
| V-260572 | Medium | Ubuntu 22.04 LTS must encrypt all stored passwords with a FIPS 140-3-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... |
| V-260477 | Medium | Ubuntu 22.04 LTS must be configured so that the Advance Package Tool (APT) removes all software components after updated versions have been installed. | 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... |
| V-260474 | Medium | Ubuntu 22.04 LTS must implement address space layout randomization to protect its memory from unauthorized code execution. | Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in prohibited memory locations. Security safeguards employed to protect memory include, for... |
| V-260475 | Medium | Ubuntu 22.04 LTS must implement nonexecutable data to protect its memory from unauthorized code execution. | Some adversaries launch attacks with the intent of executing code in nonexecutable regions of memory or in memory locations that are prohibited. Security safeguards employed to protect memory... |
| V-260473 | Medium | Ubuntu 22.04 LTS must disable kernel core dumps so that it can fail to a secure state if system initialization fails, shutdown fails or aborts fail. | 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... |
| V-260578 | Medium | Ubuntu 22.04 LTS for PKI-based authentication, must implement a local cache of revocation data in case of the inability to access revocation information via the network. | Without configuring a local cache of revocation data, there is the potential to allow access to users who are no longer authorized (users with revoked certificates). |
| V-260548 | Medium | Ubuntu 22.04 LTS must automatically expire temporary accounts within 72 hours. | Temporary accounts are privileged or nonprivileged accounts established during pressing circumstances, such as new software or hardware configuration or an incident response, where the need for... |
| V-260542 | Medium | Ubuntu 22.04 LTS must prevent direct login into the root account. | To ensure individual accountability and prevent unauthorized access, organizational users must be individually identified and authenticated.
A group authenticator is a generic account used by... |
| V-260543 | Medium | Ubuntu 22.04 LTS must uniquely identify interactive users. | To ensure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system.
Organizational... |
| V-260540 | Medium | Ubuntu 22.04 LTS must disable automatic mounting of Universal Serial Bus (USB) mass storage driver. | 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... |
| V-260541 | Medium | Ubuntu 22.04 LTS must disable all wireless network adapters. | Without protection of communications with wireless peripherals, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read, altered, or... |
| V-260546 | Medium | Ubuntu 22.04 LTS must enforce a 60-day maximum password lifetime restriction. Passwords for new users 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 the operating system does not limit the lifetime of passwords and force... |
| V-260547 | Medium | Ubuntu 22.04 LTS must disable account identifiers (individuals, groups, roles, and devices) after 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... |
| V-260545 | Medium | Ubuntu 22.04 LTS must enforce 24 hours/one day as the minimum password lifetime. Passwords for new users must have a 24 hours/one day minimum password lifetime restriction. | 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... |
| V-260558 | Medium | Ubuntu 22.04 LTS must require users to reauthenticate for privilege escalation or when 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... |
| V-260555 | Medium | Ubuntu 22.04 LTS default filesystem 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 newly created accounts do not have unnecessary access. |
| V-260554 | Medium | Ubuntu 22.04 LTS must automatically exit interactive command shell user sessions after 15 minutes of inactivity. | Terminating an idle interactive command shell user session within a short time period reduces the window of opportunity for unauthorized personnel to take control of it when left unattended in a... |
| V-260557 | Medium | Ubuntu 22.04 LTS must be configured to use AppArmor. | Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may provide a capability that runs counter to the mission or provides users... |
| V-260556 | Medium | Ubuntu 22.04 LTS must have the "apparmor" package installed. | Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may provide a capability that runs counter to the mission or provides users... |
| V-260553 | Medium | Ubuntu 22.04 LTS must allow users to directly initiate a session lock for all connection types. | 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... |
| V-260638 | Medium | Ubuntu 22.04 LTS must generate audit records for any use of the setxattr, fsetxattr, lsetxattr, removexattr, fremovexattr, and lremovexattr system calls. | Without generating audit records 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... |
| V-260639 | Medium | Ubuntu 22.04 LTS must generate audit records for any successful/unsuccessful use of unlink, unlinkat, rename, renameat, and rmdir system calls. | Without generating audit records 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... |
| V-260528 | Medium | Ubuntu 22.04 LTS must be configured so that all network connections associated with SSH traffic are terminated after 10 minutes of becoming unresponsive. | Terminating an unresponsive 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... |
| V-260632 | Medium | Ubuntu 22.04 LTS must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/shadow. | Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to create an... |
| V-260522 | Medium | Ubuntu 22.04 LTS must be configured to use TCP syncookies. | 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.
... |
| V-260633 | Medium | Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses of the chmod, fchmod, and fchmodat system calls. | Without generating audit records 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... |
| V-260525 | Medium | Ubuntu 22.04 LTS must display the Standard Mandatory DOD Notice and Consent Banner before granting any local or remote connection to the system. | Display of a standardized and approved use notification before granting access to the publicly accessible operating system ensures privacy and security notification verbiage used is consistent... |
| V-260527 | Medium | Ubuntu 22.04 LTS must be configured so that all network connections associated with SSH traffic terminate after becoming unresponsive. | Terminating an unresponsive 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... |
| V-260498 | Medium | Ubuntu 22.04 LTS library directories must be group-owned by "root". | If the operating system 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... |
| V-260499 | Medium | Ubuntu 22.04 LTS library files must be owned by "root". | If the operating system 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... |
| V-260494 | Medium | Ubuntu 22.04 LTS must have directories that contain system commands 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... |
| V-260495 | Medium | Ubuntu 22.04 LTS must have system commands owned by "root" or a system account. | If Ubuntu 22.04 LTS 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... |
| V-260496 | Medium | Ubuntu 22.04 LTS must have system commands group-owned by "root" or a system account. | If Ubuntu 22.04 LTS 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... |
| V-260497 | Medium | Ubuntu 22.04 LTS library directories must be owned by "root". | If the operating system 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... |
| V-260490 | Medium | Ubuntu 22.04 LTS must generate system journal entries without revealing information that could be exploited by adversaries. | Any operating system providing too much information in error messages risks compromising the data and security of the structure, and content of error messages needs to be carefully considered by... |
| V-260491 | Medium | Ubuntu 22.04 LTS must configure "/var/log/syslog" file with mode "640" 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 operating system or... |
| V-260492 | Medium | Ubuntu 22.04 LTS must configure audit tools with a mode of "755" or less permissive. | 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... |
| V-260493 | Medium | Ubuntu 22.04 LTS must have directories that contain system commands 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... |
| V-260481 | Low | Ubuntu 22.04 LTS must not have the "ntp" package installed. | 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... |
| V-260480 | Low | Ubuntu 22.04 LTS must not have the "systemd-timesyncd" package installed. | 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... |
| V-260587 | Low | Ubuntu 22.04 LTS must have a crontab script running weekly to offload audit events of standalone systems. | 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. |
| V-260581 | Low | Ubuntu 22.04 LTS must be configured such that Pluggable Authentication Module (PAM) prohibits 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. |
| V-260519 | Low | Ubuntu 22.04 LTS must, for networked systems, compare internal information system clocks at least every 24 hours with a server synchronized to one of the redundant 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... |
| V-260593 | Low | Ubuntu 22.04 LTS must alert the information system security officer (ISSO) and system administrator (SA) in the event 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... |
| V-260592 | Low | Ubuntu 22.04 LTS audit event multiplexor must be configured to offload audit logs onto a different system 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.... |
| V-260595 | Low | Ubuntu 22.04 LTS must allocate audit record storage capacity to store at least one weeks' worth of audit records, when audit records are not immediately sent to a central audit record storage facility. | To ensure operating systems have a sufficient storage capacity in which to write the audit logs, operating systems must be able to allocate audit record storage capacity.
The task of... |
| V-260596 | Low | Ubuntu 22.04 LTS must immediately notify the system administrator (SA) and information system security officer (ISSO) when the audit record storage volume reaches 25 percent remaining of the allocated capacity. | If security personnel are not notified immediately when storage volume reaches 25 percent remaining of the allocated capacity, they are unable to plan for audit record storage capacity expansion. |
| V-260476 | Low | Ubuntu 22.04 LTS must be configured so that the Advance Package Tool (APT) prevents the installation of patches, service packs, device drivers, or operating system components without verification they have 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... |
| V-260472 | Low | Ubuntu 22.04 LTS must restrict access to the kernel message buffer. | Restricting access to the kernel message buffer limits access only to root. This prevents attackers from gaining additional system information as a nonprivileged user. |
| V-260549 | Low | Ubuntu 22.04 LTS must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts have been made. | By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the... |
| V-260551 | Low | Ubuntu 22.04 LTS must display the date and time of the last successful account logon upon logon. | Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the... |
| V-260550 | Low | Ubuntu 22.04 LTS must enforce a delay of at least four seconds between logon prompts following a failed logon attempt. | Limiting the number of logon attempts over a certain time interval reduces the chances that an unauthorized user may gain access to an account. |
| V-260552 | Low | Ubuntu 22.04 LTS must limit the number of concurrent sessions to ten for all accounts and/or account types. | Ubuntu 22.04 LTS management includes the ability to control the number of users and user sessions that utilize an operating system. Limiting the number of allowed users and sessions per user is... |
| V-260520 | Low | Ubuntu 22.04 LTS must synchronize internal information system clocks to the authoritative time source when the time difference is greater than one second. | 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... |
| V-260521 | Low | Ubuntu 22.04 LTS must record time stamps for audit records that can be mapped to Coordinated Universal Time (UTC). | If time stamps are not consistently applied and there is no common time reference, it is difficult to perform forensic analysis.
Time stamps generated by the operating system include date and... |
| V-260479 | Low | Ubuntu 22.04 LTS must have the "chrony" package installed. | 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... |
