Ubuntu 22.04 LTS must be configured so that audit configuration files are not write-accessible by unauthorized users.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-260601	UBTU-22-653065	SV-260601r958444_rule		Medium

Description
Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming the audit log. Misconfigured audits may also make it more difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.

Description

Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming the audit log. Misconfigured audits may also make it more difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.

STIG	Date
Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide	2024-05-30

Details

Check Text ( C-64330r953614_chk )
Verify that "/etc/audit/audit.rules", "/etc/audit/auditd.conf", and "/etc/audit/rules.d/" files have a mode of "640" or less permissive by using the following command: $ sudo ls -al /etc/audit/audit.rules /etc/audit/auditd.conf /etc/audit/rules.d/ \| awk '{print $1, $9}' -rw-r----- /etc/audit/audit.rules -rw-r----- /etc/audit/auditd.conf -rw-r----- /etc/audit/rules.d/audit.rules If "/etc/audit/audit.rules", "/etc/audit/auditd.conf", or "/etc/audit/rules.d/*" files have a mode more permissive than "640", this is a finding.

Check Text ( C-64330r953614_chk )

Verify that "/etc/audit/audit.rules", "/etc/audit/auditd.conf", and "/etc/audit/rules.d/*" files have a mode of "640" or less permissive by using the following command:

$ sudo ls -al /etc/audit/audit.rules /etc/audit/auditd.conf /etc/audit/rules.d/* | awk '{print $1, $9}'
-rw-r----- /etc/audit/audit.rules
-rw-r----- /etc/audit/auditd.conf
-rw-r----- /etc/audit/rules.d/audit.rules

If "/etc/audit/audit.rules", "/etc/audit/auditd.conf", or "/etc/audit/rules.d/*" files have a mode more permissive than "640", this is a finding.

Fix Text (F-64238r953615_fix)
Configure /etc/audit/audit.rules", "/etc/audit/auditd.conf", and "/etc/audit/rules.d/" files to have a mode of "640" by using the following command: $ sudo chmod -R 640 /etc/audit/audit.rules /etc/audit/auditd.conf /etc/audit/rules.d/