Title

Ubuntu 24.04 LTS must be configured so that audit configuration files are not write-accessible by unauthorized users. (Cat II impact)

Discussion

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.

Check Content

Verify /etc/audit/audit.rules, /etc/audit/rules.d/*, and /etc/audit/auditd.conf files have a mode of "0640" or less permissive with the following command: $ sudo ls -al /etc/audit/ /etc/audit/rules.d/ /etc/audit/: -rw-r----- 1 root root 804 Nov 25 11:01 auditd.conf -rw-r----- 1 root root 9128 Dec 27 09:56 audit.rules -rw-r----- 1 root root 127 Feb 7 2018 audit-stop.rules drwxr-x--- 2 root root 4096 Dec 27 09:56 rules.d /etc/audit/rules.d/: -rw-r----- 1 root root 244 Dec 27 09:56 audit.rules -rw-r----- 1 root root 10357 Dec 27 09:56 stig.rules If /etc/audit/audit.rule, /etc/audit/rules.d/*, or /etc/audit/auditd.conf files have a mode more permissive than "0640", this is a finding.

Fix Text

Configure /etc/audit/audit.rules, /etc/audit/rules.d/*, and /etc/audit/auditd.conf files to have a mode of "0640" by using the following command: $ sudo chmod -R 0640 /etc/audit/audit*.{rules,conf} /etc/audit/rules.d/*

Additional Identifiers

Rule ID: SV-270775r1068369_rule

Vulnerability ID: V-270775

Group Title: SRG-OS-000063-GPOS-00032

Expert Comments

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