Detections
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4.1.3.4 Ensure events that modify the system's Mandatory Access Controls are collected

Warning! Audit Deprecated

This audit has been deprecated and will be removed in a future update.

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Information

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/ and /usr/share/selinux/ directories.

Note:

 - If a different Mandatory Access Control method is used, changes to the corresponding directories should be audited.
 - Reloading the auditd config to set active settings requires the auditd service to be restarted, and may require a system reboot.

Changes to files in the /etc/selinux/ and /usr/share/selinux/ directories could indicate that an unauthorized user is attempting to modify access controls and change security contexts, leading to a compromise of the system.

Solution

Edit or create a file in the /etc/audit/rules.d/ directory ending in .rules

Example: vi /etc/audit/rules.d/50-MAC_policy.rules

Add the following lines:

-w /etc/selinux/ -p wa -k MAC-policy
-w /usr/share/selinux/ -p wa -k MAC-policy

See Also

https://workbench.cisecurity.org/benchmarks/8415

Item Details

References: CSCv7|5.5

Plugin: Unix

Control ID: a644b471f73011b77856a1ec375336626a689adb1e193be63b496fa65393dbd8