Canonical Ubuntu 18.04 LTS STIG Version Comparison

There are 3 differences between versions v2 r12 (Oct. 25, 2023) (the "left" version) and v2 r14 (April 24, 2024) (the "right" version).

Check UBTU-18-010356 was removed from the benchmark in the "right" version. The text below reflects the old wording.

This check's original form is available here.

Title

The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the finit_module syscall.

Check Content

Verify the Ubuntu operating system generates an audit record when successful/unsuccessful attempts to use the "finit_module" syscall. Check the currently configured audit rules with the following command: # sudo auditctl -l | grep -w finit_module -a always,exit -F arch=b32 -S finit_module -F auid>=1000 -F auid!=-1 -k module_chng -a always,exit -F arch=b64 -S finit_module -F auid>=1000 -F auid!=-1 -k module_chng If the command does not return a line that matches the example or the line is commented out, this is a finding. Notes: For 32-bit architectures, only the 32-bit specific output lines from the commands are required. The '-k' allows for specifying an arbitrary identifier and the string after it does not need to match the example output above.

Discussion

Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter).

Fix

Configure the audit system to generate an audit event for any successful/unsuccessful use of the "finit_module" syscall. Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file: -a always,exit -F arch=b32 -S finit_module -F auid>=1000 -F auid!=4294967295 -k module_chng -a always,exit -F arch=b64 -S finit_module -F auid>=1000 -F auid!=4294967295 -k module_chng Notes: For 32-bit architectures, only the 32-bit specific entries are required. The "root" account must be used to view/edit any files in the /etc/audit/rules.d/ directory. In order to reload the rules file, issue the following command: # sudo augenrules --load