Title

The audit system must be configured to audit the loading and unloading of dynamic kernel modules. (Cat II impact)

Discussion

Actions concerning dynamic kernel modules must be recorded as they are substantial events. Dynamic kernel modules can increase the attack surface of a system. A malicious kernel module can be used to substantially alter the functioning of a system, often with the purpose of hiding a compromise from the SA.

Check Content

Check /etc/audit/audit_site.conf file to determine if syscalls handling kernel modules are audited. # egrep -i "admin|modload|moduload|modpath" /etc/audit/audit_site.conf All of the above syscalls must be defined in the file, otherwise this is a finding.

Fix Text

Edit /etc/audit/audit_site.conf and add the admin, modload, moduload, and modpath syscalls to the list of events to be audited.

Additional Identifiers

Rule ID: SV-26525r2_rule

Vulnerability ID: V-22383

Group Title: GEN002825

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.