cyberstrikeus 8.1.7 Record Events That Modify the System's Mandatory Access Controls (Scored)
Profile Applicability
- Level 2
Description
Monitor SELinux mandatory access controls. The parameters below monitor any write access (potential additional, deletion or modification of files in the directory) or attribute changes to the /etc/selinux/ directory.
Rationale
Changes to files in this directory could indicate that an unauthorized user is attempting to modify access controls and change security contexts, leading to a compromise of the system.
Audit Procedure
Using Command Line
Perform the following to determine if events that modify the system's mandatory access controls are recorded:
grep MAC-policy /etc/audit/audit.rules
Expected Result
-w /etc/selinux/ -p wa -k MAC-policy
Remediation
Using Command Line
Add the following lines to the /etc/audit/audit.rules file:
-w /etc/selinux/ -p wa -k MAC-policy
# Execute the following command to restart auditd
# pkill -P 1-HUP auditd
Default Value
By default, mandatory access control modification events are not audited.
References
- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
Profile
Level 2 - Scored