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Guide to the Secure Configuration of Ubuntu 20.04

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Ensure auditd Collects Information on the Use of Privileged Commands - newuidmap

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - pam_timestamp_check

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - passwd

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - postdrop

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Action for auditd to take when disk space just starts to run low

    The setting for space_left_action in /etc/audit/auditd.conf
    Value
    Show

  • The percentage remaining in disk space before prompting space_left_action

    The setting for space_left as a percentage in /etc/audit/auditd.conf
    Value
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - postqueue

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - rmmod

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Record Any Attempts to Run ssh-agent

    At a minimum, the audit system should collect any execution attempt of the <code>ssh-agent</code> command for all users and root. If the <code>audi...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - su

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - sudo

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - sudoedit

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - umount

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - unix_chkpwd

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Configure audispd Plugin To Send Logs To Remote Server

    Configure the audispd plugin to off-load audit records onto a different system or media from the system being audited. First, set the <code>active...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - unix_update

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Ensure auditd Collects Information on the Use of Privileged Commands - usermod

    At a minimum, the audit system should collect the execution of privileged commands for all users and root. If the <code>auditd</code> daemon is con...
    Rule Medium Severity
    Show

  • Records Events that Modify Date and Time Information

    Arbitrary changes to the system time can be used to obfuscate nefarious activities in log files, as well as to confuse network services that are hi...
    Group
    Show

  • Record attempts to alter time through adjtimex

    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 Attempts to Alter Time Through clock_settime

    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 attempts to alter time through settimeofday

    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 Attempts to Alter Time Through stime

    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 Attempts to Alter the localtime File

    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

  • Configure auditd Data Retention

    The audit system writes data to <code>/var/log/audit/audit.log</code>. By default, <code>auditd</code> rotates 5 logs by size (6MB), retaining a ma...
    Group
    Show

  • Action for audispd to take when disk is full

    The setting for disk_full_action in /etc/audisp/audisp-remote.conf
    Value
    Show

  • Action for audispd to take when network fails

    The setting for network_failure_action in /etc/audisp/audisp-remote.conf
    Value
    Show

  • Remote server for audispd to send audit records

    The setting for remote_server in /etc/audisp/audisp-remote.conf
    Value
    Show

  • Account for auditd to send email when actions occurs

    The setting for action_mail_acct in /etc/audit/auditd.conf
    Value
    Show

  • Action for auditd to take when disk space is low

    The setting for admin_space_left_action in /etc/audit/auditd.conf
    Value
    Show

  • The percentage remaining in disk space before prompting admin_space_left_action

    The setting for admin_space_left as a percentage in /etc/audit/auditd.conf
    Value
    Show

  • Action for auditd to take when disk errors

    'The setting for disk_error_action in /etc/audit/auditd.conf, if multiple values are allowed write them separated by pipes as in "syslog|single|hal...
    Value
    Show

  • Configure auditd Max Log File Size

    Determine the amount of audit data (in megabytes) which should be retained in each log file. Edit the file <code>/etc/audit/auditd.conf</code>. Add...
    Rule Medium Severity
    Show

  • Configure auditd to use audispd's syslog plugin

    To configure the <code>auditd</code> service to use the <code>syslog</code> plug-in of the <code>audispd</code> audit event multiplexor, set the <c...
    Rule Medium Severity
    Show

  • Configure auditd Disk Error Action on Disk Error

    The <code>auditd</code> service can be configured to take an action when there is a disk error. Edit the file <code>/etc/audit/auditd.conf</code>. ...
    Rule Medium Severity
    Show

  • Configure auditd Disk Error Action on Disk Error

    The <code>auditd</code> service can be configured to take an action when there is a disk error. Edit the file <code>/etc/audit/auditd.conf</code>. ...
    Rule Medium Severity
    Show

  • Configure auditd Disk Full Action when Disk Space Is Full

    The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...
    Rule Medium Severity
    Show

  • Configure auditd Disk Full Action when Disk Space Is Full

    The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...
    Rule Medium Severity
    Show

  • Configure auditd mail_acct Action on Low Disk Space

    The <code>auditd</code> service can be configured to send email to a designated account in certain situations. Add or correct the following line in...
    Rule Medium Severity
    Show

  • Configure auditd admin_space_left Action on Low Disk Space

    The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...
    Rule Medium Severity
    Show

  • Configure auditd admin_space_left on Low Disk Space

    The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...
    Rule Medium Severity
    Show

  • Configure auditd max_log_file_action Upon Reaching Maximum Log Size

    The default action to take when the logs reach their maximum size is to rotate the log files, discarding the oldest one. To configure the action ta...
    Rule Medium Severity
    Show

  • Configure auditd max_log_file_action Upon Reaching Maximum Log Size

    The default action to take when the logs reach their maximum size is to rotate the log files, discarding the oldest one. To configure the action ta...
    Rule Medium Severity
    Show

  • Configure auditd Number of Logs Retained

    Determine how many log files <code>auditd</code> should retain when it rotates logs. Edit the file <code>/etc/audit/auditd.conf</code>. Add or modi...
    Rule Medium Severity
    Show

  • Configure auditd space_left Action on Low Disk Space

    The <code>auditd</code> service can be configured to take an action when disk space <i>starts</i> to run low. Edit the file <code>/etc/audit/auditd...
    Rule Medium Severity
    Show

  • Configure auditd space_left on Low Disk Space

    The <code>auditd</code> service can be configured to take an action when disk space is running low but prior to running out of space completely. Ed...
    Rule Medium Severity
    Show

  • Set number of records to cause an explicit flush to audit logs

    To configure Audit daemon to issue an explicit flush to disk command after writing <xccdf-1.2:sub idref="xccdf_org.ssgproject.content_value_var_aud...
    Rule Medium Severity
    Show

  • Include Local Events in Audit Logs

    To configure Audit daemon to include local events in Audit logs, set <code>local_events</code> to <code>yes</code> in <code>/etc/audit/auditd.conf<...
    Rule Medium Severity
    Show

  • Resolve information before writing to audit logs

    To configure Audit daemon to resolve all uid, gid, syscall, architecture, and socket address information before writing the events to disk, set <co...
    Rule Low Severity
    Show

  • AppArmor

    Many security vulnerabilities result from bugs in trusted programs. A trusted program runs with privileges that attackers want to possess. The prog...
    Group
    Show

  • AppArmor profiles mode

    enforce - Set all AppArmor profiles to enforce mode
    complain - Set all AppArmor profiles to complain mode
    Value
    Show

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