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Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000021-GPOS-00005

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must ensure account lockouts persist.

    &lt;VulnDiscussion&gt;Having lockouts persist across reboots ensures that account is only unlocked by an administrator. If the lockouts did not per...
    Rule Medium Severity
    Show

  • SRG-OS-000104-GPOS-00051

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 groups must have unique Group ID (GID).

    &lt;VulnDiscussion&gt;To ensure accountability and prevent unauthenticated access, groups must be identified uniquely to prevent potential misuse a...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
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  • Local RHEL 9 initialization files must not execute world-writable programs.

    &lt;VulnDiscussion&gt;If user start-up files execute world-writable programs, especially in unprotected directories, they could be maliciously modi...
    Rule Medium Severity
    Show

  • SRG-OS-000163-GPOS-00072

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must automatically exit interactive command shell user sessions after 15 minutes of inactivity.

    &lt;VulnDiscussion&gt;Terminating an idle interactive command shell user session within a short time period reduces the window of opportunity for u...
    Rule Medium Severity
    Show

  • SRG-OS-000027-GPOS-00008

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must restrict privilege elevation to authorized personnel.

    &lt;VulnDiscussion&gt;If the "sudoers" file is not configured correctly, any user defined on the system can initiate privileged actions on the targ...
    Rule Medium Severity
    Show

  • SRG-OS-000373-GPOS-00156

    <GroupDescription></GroupDescription>
    Group
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  • RHEL 9 must limit the number of concurrent sessions to ten for all accounts and/or account types.

    &lt;VulnDiscussion&gt;Operating system management includes the ability to control the number of users and user sessions that utilize an operating s...
    Rule Low Severity
    Show

  • SRG-OS-000021-GPOS-00005

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must log username information when unsuccessful logon attempts occur.

    &lt;VulnDiscussion&gt;Without auditing of these events, it may be harder or impossible to identify what an attacker did after an attack.&lt;/VulnDi...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00226

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.

    &lt;VulnDiscussion&gt;Increasing the time between a failed authentication attempt and reprompting to enter credentials helps to slow a single-threa...
    Rule Medium Severity
    Show

  • SRG-OS-000480-GPOS-00228

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must define default permissions for the bash shell.

    &lt;VulnDiscussion&gt;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
    Show

  • SRG-OS-000480-GPOS-00228

    <GroupDescription></GroupDescription>
    Group
    Show

  • RHEL 9 must define default permissions for the c shell.

    &lt;VulnDiscussion&gt;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
    Show

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