Red Hat Enterprise Linux 9 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 SSH daemon must disable remote X connections for interactive users.
<VulnDiscussion>When X11 forwarding is enabled, there may be additional exposure to the server and client displays if the sshd proxy display ...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 SSH daemon must perform strict mode checking of home directory configuration files.
<VulnDiscussion>If other users have access to modify user-specific SSH configuration files, they may be able to log into the system as anothe...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 SSH daemon must prevent remote hosts from connecting to the proxy display.
<VulnDiscussion>When X11 forwarding is enabled, there may be additional exposure to the server and client displays if the sshd proxy display ...Rule Medium Severity -
SRG-OS-000023-GPOS-00006
<GroupDescription></GroupDescription>Group -
RHEL 9 must display the Standard Mandatory DOD Notice and Consent Banner before granting local or remote access to the system via a graphical user logon.
<VulnDiscussion>Display of a standardized and approved use notification before granting access to the operating system ensures privacy and se...Rule Medium Severity -
SRG-OS-000023-GPOS-00006
<GroupDescription></GroupDescription>Group -
RHEL 9 must prevent a user from overriding the banner-message-enable setting for the graphical user interface.
<VulnDiscussion>Display of a standardized and approved use notification before granting access to the operating system ensures privacy and se...Rule Medium Severity -
SRG-OS-000114-GPOS-00059
<GroupDescription></GroupDescription>Group -
RHEL 9 must disable the graphical user interface automount function unless required.
<VulnDiscussion>Automatically mounting file systems permits easy introduction of unknown devices, thereby facilitating malicious activity. S...Rule Medium Severity -
SRG-OS-000114-GPOS-00059
<GroupDescription></GroupDescription>Group -
RHEL 9 must prevent a user from overriding the disabling of the graphical user interface automount function.
<VulnDiscussion>A nonprivileged account is any operating system account with authorizations of a nonprivileged user. Satisfies: SRG-OS-00011...Rule Medium Severity -
SRG-OS-000368-GPOS-00154
<GroupDescription></GroupDescription>Group -
RHEL 9 must disable the graphical user interface autorun function unless required.
<VulnDiscussion>Allowing autorun commands to execute may introduce malicious code to a system. Configuring this setting prevents autorun comm...Rule Medium Severity -
SRG-OS-000114-GPOS-00059
<GroupDescription></GroupDescription>Group -
RHEL 9 must prevent a user from overriding the disabling of the graphical user interface autorun function.
<VulnDiscussion>Techniques used to address this include protocols using nonces (e.g., numbers generated for a specific one-time use) or chall...Rule Medium Severity -
SRG-OS-000480-GPOS-00229
<GroupDescription></GroupDescription>Group -
RHEL 9 must not allow unattended or automatic logon via the graphical user interface.
<VulnDiscussion>Failure to restrict system access to authenticated users negatively impacts operating system security.</VulnDiscussion>...Rule High Severity
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