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Guide to the Secure Configuration of Ubuntu 22.04

Rules, Groups, and Values defined within the XCCDF Benchmark

  • All Interactive User Home Directories Must Have mode 0750 Or Less Permissive

    Change the mode of interactive users home directories to <code>0750</code>. To change the mode of interactive users home directory, use the followi...
    Rule Medium Severity
    Show

  • Ensure that User Home Directories are not Group-Writable or World-Readable

    For each human user of the system, view the permissions of the user's home directory: <pre># ls -ld /home/<i>USER</i></pre> Ensure that the directo...
    Rule Medium Severity
    Show

  • Ensure that No Dangerous Directories Exist in Root's Path

    The active path of the root account can be obtained by starting a new root shell and running: <pre># echo $PATH</pre> This will produce a colon-sep...
    Group
    Show

  • Ensure that Root's Path Does Not Include World or Group-Writable Directories

    For each element in root's path, run: 
    # ls -ld DIR
    and ensure that write permissions are disabled for group and other.
    Rule Medium Severity
    Show

  • Ensure that Root's Path Does Not Include Relative Paths or Null Directories

    Ensure that none of the directories in root's path is equal to a single <code>.</code> character, or that it contains any instances that lead to re...
    Rule Unknown Severity
    Show

  • Ensure that Users Have Sensible Umask Values

    The umask setting controls the default permissions for the creation of new files. With a default <code>umask</code> setting of 077, files and direc...
    Group
    Show

  • Sensible umask

    Enter default user umask
    Value
    Show

  • Ensure the Default Bash Umask is Set Correctly

    To ensure the default umask for users of the Bash shell is set properly, add or correct the <code>umask</code> setting in <code>/etc/bashrc</code> ...
    Rule Medium Severity
    Show

  • Ensure the Default Umask is Set Correctly in login.defs

    To ensure the default umask controlled by <code>/etc/login.defs</code> is set properly, add or correct the <code>UMASK</code> setting in <code>/etc...
    Rule Medium Severity
    Show

  • Ensure the Default Umask is Set Correctly in /etc/profile

    To ensure the default umask controlled by <code>/etc/profile</code> is set properly, add or correct the <code>umask</code> setting in <code>/etc/pr...
    Rule Medium Severity
    Show

  • Ensure the Default Umask is Set Correctly For Interactive Users

    Remove the UMASK environment variable from all interactive users initialization files.
    Rule Medium Severity
    Show

  • System Accounting with auditd

    The audit service provides substantial capabilities for recording system activities. By default, the service audits about SELinux AVC denials and c...
    Group
    Show

  • Ensure the audit Subsystem is Installed

    The audit package should be installed.
    Rule Medium Severity
    Show

  • Enable auditd Service

    The <code>auditd</code> service is an essential userspace component of the Linux Auditing System, as it is responsible for writing audit records to...
    Rule Medium Severity
    Show

  • Enable Auditing for Processes Which Start Prior to the Audit Daemon

    To ensure all processes can be audited, even those which start prior to the audit daemon, add the argument <code>audit=1</code> to the default GRUB...
    Rule Low Severity
    Show

  • Extend Audit Backlog Limit for the Audit Daemon

    To improve the kernel capacity to queue all log events, even those which occurred prior to the audit daemon, add the argument <code>audit_backlog_l...
    Rule Low Severity
    Show

  • Configure auditd Rules for Comprehensive Auditing

    The <code>auditd</code> program can perform comprehensive monitoring of system activity. This section describes recommended configuration settings ...
    Group
    Show

  • Audit failure mode

    This variable is the setting for the -f option in Audit configuration which sets the failure mode of audit. This option lets you determine how you ...
    Value
    Show

  • Make the auditd Configuration Immutable

    If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default),...
    Rule Medium Severity
    Show

  • Record Events that Modify the System's Mandatory Access Controls

    If the <code>auditd</code> daemon is configured to use the <code>augenrules</code> program to read audit rules during daemon startup (the default),...
    Rule Medium Severity
    Show

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