Ubuntu 24.04 LTS must generate audit records for successful/unsuccessful uses of the ssh-keysign command.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-270783 | UBTU-24-900120 | SV-270783r1066838_rule | CCI-000172 | medium |
| Description | ||||
| Without generating audit records 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). | ||||
| STIG | Date | |||
| Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide | 2025-05-16 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
AU-12
1.00
- DISA · 1 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.3.1
1.00
- DISA · 1 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.3.2
1.00
- DISA · 1 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000172
1.00
- DISA · 1 · disa_xccdf · related
Details
Check Text (C-270783r1066838_chk)
Verify Ubuntu 24.04 LTS generates an audit record upon successful/unsuccessful attempts to use the "ssh-keysign" command with the following command:
$ sudo auditctl -l | grep ssh-keysign
-a always,exit -F path=/usr/lib/openssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=-1 -k privileged-ssh
If the command does not return lines that match the example or the lines are 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-74717r1066837_fix)
Configure the audit system to generate an audit event for any successful/unsuccessful use of the "ssh-keysign" command.
Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file:
-a always,exit -F path=/usr/lib/openssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=-1 -k privileged-ssh
To reload the rules file, issue the following command:
$ sudo augenrules --load