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Guide to the Secure Configuration of Ubuntu 18.04

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Record Execution Attempts to Run SELinux Privileged Commands

    At a minimum, the audit system should collect the execution of SELinux privileged commands for all users and root.
    Group
    Show

  • Record File Deletion Events by User

    At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use t...
    Group
    Show

  • Ensure auditd Collects File Deletion Events by User - rename

    At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use t...
    Rule Medium Severity
    Show

  • Ensure auditd Collects File Deletion Events by User - renameat

    At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use t...
    Rule Medium Severity
    Show

  • Ensure auditd Collects File Deletion Events by User - rmdir

    At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use t...
    Rule Medium Severity
    Show

  • Ensure auditd Collects File Deletion Events by User - unlink

    At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use t...
    Rule Medium Severity
    Show

  • Ensure auditd Collects File Deletion Events by User - unlinkat

    At a minimum, the audit system should collect file deletion events for all users and root. If the <code>auditd</code> daemon is configured to use t...
    Rule Medium Severity
    Show

  • Record Unauthorized Access Attempts Events to Files (unsuccessful)

    At a minimum, the audit system should collect unauthorized file accesses for all users and root. Note that the "-F arch=b32" lines should be presen...
    Group
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  • Record Information on Kernel Modules Loading and Unloading

    To capture kernel module loading and unloading events, use following lines, setting ARCH to either b32 for 32-bit system, or having two lines for b...
    Group
    Show

  • Record Information on the Use of Privileged Commands

    At a minimum, the audit system should collect the execution of privileged commands for all users and root.
    Group
    Show

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

    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 - poweroff

    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 - reboot

    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 - shutdown

    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

    The audit system should collect information about usage of privileged commands for all users. These are commands with suid or sgid bits on and they...
    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

  • 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

  • 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
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  • 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 auditd to take when log files reach their maximum size

    The setting for max_log_file_action in /etc/audit/auditd.conf. The following options are available: <br>ignore - audit daemon does nothing. <br>sys...
    Value
    Show

  • Number of log files for auditd to retain

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

  • Size remaining in disk space before prompting space_left_action

    The setting for space_left (MB) in /etc/audit/auditd.conf
    Value
    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

  • 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 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 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

  • 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

  • Appropriate Action Must be Setup When the Internal Audit Event Queue is Full

    The audit system should have an action setup in the event the internal event queue becomes full. To setup an overflow action edit <code>/etc/audit/...
    Rule Medium Severity
    Show

  • Write Audit Logs to the Disk

    To configure Audit daemon to write Audit logs to the disk, set <code>write_logs</code> to <code>yes</code> in <code>/etc/audit/auditd.conf</code>. ...
    Rule Medium Severity
    Show

  • System Accounting with auditd

    The <code>auditd</code> program can perform comprehensive monitoring of system activity. This section makes use of recommended configuration settin...
    Group
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  • AppArmor

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