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Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000021-GPOS-00005

    <GroupDescription></GroupDescription>
    Group
  • 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.

    &lt;VulnDiscussion&gt;By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...
    Rule Low Severity
  • SRG-OS-000480-GPOS-00226

    <GroupDescription></GroupDescription>
    Group
  • Ubuntu 22.04 LTS must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.

    &lt;VulnDiscussion&gt;Limiting the number of logon attempts over a certain time interval reduces the chances that an unauthorized user may gain acc...
    Rule Low Severity
  • SRG-OS-000480-GPOS-00227

    <GroupDescription></GroupDescription>
    Group
  • Ubuntu 22.04 LTS must display the date and time of the last successful account logon upon logon.

    &lt;VulnDiscussion&gt;Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the sys...
    Rule Low Severity
  • SRG-OS-000027-GPOS-00008

    <GroupDescription></GroupDescription>
    Group
  • Ubuntu 22.04 LTS must limit the number of concurrent sessions to ten for all accounts and/or account types.

    &lt;VulnDiscussion&gt;Ubuntu 22.04 LTS management includes the ability to control the number of users and user sessions that utilize an operating s...
    Rule Low Severity
  • SRG-OS-000030-GPOS-00011

    <GroupDescription></GroupDescription>
    Group
  • Ubuntu 22.04 LTS must allow users to directly initiate a session lock for all connection types.

    &lt;VulnDiscussion&gt;A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...
    Rule Medium Severity
  • SRG-OS-000279-GPOS-00109

    <GroupDescription></GroupDescription>
    Group
  • Ubuntu 22.04 LTS 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
  • SRG-OS-000480-GPOS-00228

    <GroupDescription></GroupDescription>
    Group
  • 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.

    &lt;VulnDiscussion&gt;Setting the most restrictive default permissions ensures newly created accounts do not have unnecessary access.&lt;/VulnDiscu...
    Rule Medium Severity
  • SRG-OS-000312-GPOS-00124

    <GroupDescription></GroupDescription>
    Group
  • Ubuntu 22.04 LTS must have the "apparmor" package installed.

    &lt;VulnDiscussion&gt;Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may pr...
    Rule Medium Severity
  • SRG-OS-000368-GPOS-00154

    <GroupDescription></GroupDescription>
    Group
  • Ubuntu 22.04 LTS must be configured to use AppArmor.

    &lt;VulnDiscussion&gt;Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may pr...
    Rule Medium Severity
  • SRG-OS-000373-GPOS-00156

    <GroupDescription></GroupDescription>
    Group
  • Ubuntu 22.04 LTS must ensure only users who need access to security functions are part of sudo group.

    &lt;VulnDiscussion&gt;An isolation boundary provides access control and protects the integrity of the hardware, software, and firmware that perform...
    Rule High Severity

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