|Finding ID||Version||Rule ID||IA Controls||Severity|
|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).|
|Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide||2022-12-06|
|Check Text ( C-21001r305156_chk )|
| Verify that an audit event is generated for any successful/unsuccessful use of the "crontab" command. |
Check the currently configured audit rules with the following command:
# sudo auditctl -l | grep -w crontab
-a always,exit -F path=/usr/bin/crontab -F perm=x -F auid>=1000 -F auid!=-1 -k privileged-crontab
If the command does not return a line that matches the example or the line is commented out, this is a finding.
Note: 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-21000r305157_fix)|
| Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "crontab" command. |
Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file:
-a always,exit -F path=/usr/bin/crontab -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-crontab
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