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cis-ubuntu1204-v110-8-1-7

DevOps & Security
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Record Events That Modify the System's Mandatory Access Controls

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Operating_Systems/Ubuntu/CIS_Ubuntu_12.04_LTS_Server_Benchmark_v1.1.0/cis-ubuntu1204-v110-8-1-7/SKILL.md

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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