Title

Ubuntu OS 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/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

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/*

Additional Identifiers

Rule ID: SV-275534r1147652_rule

Vulnerability ID: V-275534

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

Expert Comments

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