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


Finding ID Version Rule ID IA Controls Severity
V-238297 UBTU-20-010181 SV-238297r802387_rule Medium
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). Satisfies: SRG-OS-000477-GPOS-00222
Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide 2022-12-06


Check Text ( C-41507r654064_chk )
Verify the Ubuntu operating system generates an audit record for any successful/unsuccessful attempts to use the "delete_module" syscall.

Check the currently configured audit rules with the following command:

$ sudo auditctl -l | grep -w delete_module

-a always,exit -F arch=b32 -S delete_module -F auid>=1000 -F auid!=-1 -k module_chng
-a always,exit -F arch=b64 -S delete_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.

- 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.
Fix Text (F-41466r654065_fix)
Configure the audit system to generate an audit event for any successful/unsuccessful use of the "delete_module" syscall.

Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file:

-a always,exit -F arch=b32 -S delete_module -F auid>=1000 -F auid!=4294967295 -k module_chng
-a always,exit -F arch=b64 -S delete_module -F auid>=1000 -F auid!=4294967295 -k module_chng

Notes: For 32-bit architectures, only the 32-bit specific entries are required.

To reload the rules file, issue the following command:

$ sudo augenrules --load