II - Mission Support Sensitive
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000031-GPOS-00012
<GroupDescription></GroupDescription>Group -
RHEL 9 must conceal, via the session lock, information previously visible on the display with a publicly viewable image.
<VulnDiscussion>Setting the screensaver mode to blank-only conceals the contents of the display from passersby.</VulnDiscussion><Fal...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 effective dconf policy must match the policy keyfiles.
<VulnDiscussion>Unlike text-based keyfiles, the binary database is impossible to check through most automated and all manual means; therefore...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must disable the ability of a user to restart the system from the login screen.
<VulnDiscussion>A user who is at the console can reboot the system at the login screen. If restart or shutdown buttons are pressed at the log...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must prevent a user from overriding the disable-restart-buttons setting for the graphical user interface.
<VulnDiscussion>A user who is at the console can reboot the system at the login screen. If restart or shutdown buttons are pressed at the log...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must disable the ability of a user to accidentally press Ctrl-Alt-Del and cause a system to shut down or reboot.
<VulnDiscussion>A locally logged-in user who presses Ctrl-Alt-Del, when at the console, can reboot the system. If accidentally pressed, as co...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must prevent a user from overriding the Ctrl-Alt-Del sequence settings for the graphical user interface.
<VulnDiscussion>A locally logged-in user who presses Ctrl-Alt-Del, when at the console, can reboot the system. If accidentally pressed, as co...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must disable the user list at logon for graphical user interfaces.
<VulnDiscussion>Leaving the user list enabled is a security risk since it allows anyone with physical access to the system to enumerate known...Rule Medium Severity -
SRG-OS-000114-GPOS-00059
<GroupDescription></GroupDescription>Group -
RHEL 9 must be configured to disable USB mass storage.
<VulnDiscussion>USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity. Satisfies: SRG-OS-00...Rule Medium Severity -
SRG-OS-000378-GPOS-00163
<GroupDescription></GroupDescription>Group -
RHEL 9 must have the USBGuard package installed.
<VulnDiscussion>The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enfo...Rule Medium Severity -
SRG-OS-000378-GPOS-00163
<GroupDescription></GroupDescription>Group -
RHEL 9 must have the USBGuard package enabled.
<VulnDiscussion>The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enfo...Rule Medium Severity -
SRG-OS-000062-GPOS-00031
<GroupDescription></GroupDescription>Group -
RHEL 9 must enable Linux audit logging for the USBGuard daemon.
<VulnDiscussion>Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...Rule Low Severity -
SRG-OS-000378-GPOS-00163
<GroupDescription></GroupDescription>Group -
RHEL 9 must block unauthorized peripherals before establishing a connection.
<VulnDiscussion>The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enfo...Rule Medium Severity -
SRG-OS-000095-GPOS-00049
<GroupDescription></GroupDescription>Group -
RHEL 9 Bluetooth must be disabled.
<VulnDiscussion>This requirement applies to wireless peripheral technologies (e.g., wireless mice, keyboards, displays, etc.) used with RHEL ...Rule Medium Severity -
SRG-OS-000299-GPOS-00117
<GroupDescription></GroupDescription>Group -
RHEL 9 wireless network adapters must be disabled.
<VulnDiscussion>This requirement applies to wireless peripheral technologies (e.g., wireless mice, keyboards, displays, etc.) used with RHEL ...Rule Medium Severity -
SRG-OS-000076-GPOS-00044
<GroupDescription></GroupDescription>Group -
RHEL 9 user account passwords for new users or password changes must have a 60-day maximum password lifetime restriction in /etc/login.defs.
<VulnDiscussion>Any password, no matter how complex, can eventually be cracked; therefore, passwords need to be changed periodically. If the ...Rule Medium Severity -
SRG-OS-000076-GPOS-00044
<GroupDescription></GroupDescription>Group -
RHEL 9 user account passwords must have a 60-day maximum password lifetime restriction.
<VulnDiscussion>Any password, no matter how complex, can eventually be cracked; therefore, passwords need to be changed periodically. If RHEL...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
All RHEL 9 local interactive user accounts must be assigned a home directory upon creation.
<VulnDiscussion>If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files th...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must set the umask value to 077 for all local interactive user accounts.
<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or le...Rule Medium Severity -
SRG-OS-000104-GPOS-00051
<GroupDescription></GroupDescription>Group -
RHEL 9 duplicate User IDs (UIDs) must not exist for interactive users.
<VulnDiscussion>To ensure accountability and prevent unauthenticated access, interactive users must be identified and authenticated to preven...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 system accounts must not have an interactive login shell.
<VulnDiscussion>Ensuring shells are not given to system accounts upon login makes it more difficult for attackers to make use of system accou...Rule Medium Severity -
SRG-OS-000123-GPOS-00064
<GroupDescription></GroupDescription>Group -
RHEL 9 must automatically expire temporary accounts within 72 hours.
<VulnDiscussion>Temporary accounts are privileged or nonprivileged accounts that are established during pressing circumstances, such as new s...Rule Medium Severity -
SRG-OS-000104-GPOS-00051
<GroupDescription></GroupDescription>Group -
All RHEL 9 interactive users must have a primary group that exists.
<VulnDiscussion>If a user is assigned the Group Identifier (GID) of a group that does not exist on the system, and a group with the GID is su...Rule Medium Severity -
SRG-OS-000118-GPOS-00060
<GroupDescription></GroupDescription>Group -
RHEL 9 must disable account identifiers (individuals, groups, roles, and devices) after 35 days of inactivity.
<VulnDiscussion>Inactive identifiers pose a risk to systems and applications because attackers may exploit an inactive identifier and potenti...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
Executable search paths within the initialization files of all local interactive RHEL 9 users must only contain paths that resolve to the system default or the users home directory.
<VulnDiscussion>The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search t...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
All RHEL 9 local interactive users must have a home directory assigned in the /etc/passwd file.
<VulnDiscussion>If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files th...Rule Medium Severity
Node 2
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