STIGQter: STIG Summary: Riverbed NetIM OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 11 Sep 2025:

Ubuntu OS must generate audit records for successful/unsuccessful uses of the ssh-keysign command.

DISA Rule

SV-275706r1148168_rule

Vulnerability Number

V-275706

Group Title

SRG-OS-000064-GPOS-00033

Rule Version

RIIM-OS-654095

Severity

CAT II

CCI(s)

• CCI-000172 - Generate audit records for the event types defined in AU-2 c that include the audit record content defined in AU-3.

Weight

10

Fix Recommendation

Configure the audit system to generate an audit event for any successful/unsuccessful use of the "ssh-keysign" command.

Add or modify the following line 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!=unset -k privileged-ssh

To reload the rules file, issue the following command:

$ sudo augenrules --load

Note: The "-k <keyname>" at the end of the line gives the rule a unique meaning to help during an audit investigation. The <keyname> does not need to match the example above.

Check Contents

Verify Ubuntu OS generates an audit record upon successful/unsuccessful attempts to use the "ssh-keysign" command by using the following command:

$ sudo auditctl -l | grep ssh-keysign
-a always,exit -S all -F path=/usr/lib/openssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=-1 -F key=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 "key=" value is arbitrary and can be different from the example output above.

Vulnerability Number

V-275706

Documentable

False

Rule Version

RIIM-OS-654095

Severity Override Guidance

Verify Ubuntu OS generates an audit record upon successful/unsuccessful attempts to use the "ssh-keysign" command by using the following command:

$ sudo auditctl -l | grep ssh-keysign
-a always,exit -S all -F path=/usr/lib/openssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=-1 -F key=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 "key=" value is arbitrary and can be different from the example output above.

Check Content Reference

M

Target Key

5706