Check: UBTU-20-010177
Canonical Ubuntu 20.04 LTS STIG:
UBTU-20-010177
(in versions v1 r11 through v1 r1)
Title
The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the crontab command. (Cat II impact)
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).
Check Content
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
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 To reload the rules file, issue the following command: $ sudo augenrules --load
Additional Identifiers
Rule ID: SV-238293r654054_rule
Vulnerability ID: V-238293
Group Title: SRG-OS-000064-GPOS-00033
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000172 |
The information system generates audit records for the events defined in AU-2 d. with the content defined in AU-3. |
Controls
Number | Title |
---|---|
AU-12 |
Audit Generation |