Title

SLEM 5 must protect audit rules from unauthorized modification. (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 that SLEM 5 protects audit rules from unauthorized modification with the following command: > grep -i audit /etc/permissions.local /var/log/audit root:root 600 /var/log/audit/audit.log root:root 600 /etc/audit/audit.rules root:root 640 /etc/audit/rules.d/audit.rules root:root 640 If the command does not return any output or all four lines as shown, this is a finding. Check that all of the audit information files and folders have the correct permissions with the following command: > sudo chkstat /etc/permissions.local If the command returns any output, this is a finding.

Fix Text

Configure SLEM 5 to protect audit rules from unauthorized modification. Add or modify the following lines in "/etc/permissions.local": /var/log/audit root:root 600 /var/log/audit/audit.log root:root 600 /etc/audit/audit.rules root:root 640 /etc/audit/rules.d/audit.rules root:root 640 Set the correct permissions with the following command: > sudo chkstat --set /etc/permissions.local

Additional Identifiers

Rule ID: SV-261418r996665_rule

Vulnerability ID: V-261418

Group Title: SRG-OS-000057-GPOS-00027

Expert Comments

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