SLEM 5 must generate audit records for all uses of the "ssh-keysign" command.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-261443	SLEM-05-654100	SV-261443r996736_rule		Medium

Description
Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trails in sufficient detail to reconstruct events to determine the cause and impact of compromise.

STIG	Date
SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide	2024-06-04

Details

Check Text ( C-65172r996734_chk )
Verify SLEM 5 generates an audit record for all uses of the "ssh-keysign" command with the following command: > sudo auditctl -l \| grep -w '/usr/lib/ssh/ssh-keysign' -a always,exit -S all -F path=/usr/lib/ssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-ssh-keysign If the command does not return any output, this is a finding. Note: The "key=" value is arbitrary and can be different from the example output above.

Check Text ( C-65172r996734_chk )

Verify SLEM 5 generates an audit record for all uses of the "ssh-keysign" command with the following command:

> sudo auditctl -l | grep -w '/usr/lib/ssh/ssh-keysign'
-a always,exit -S all -F path=/usr/lib/ssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-ssh-keysign

If the command does not return any output, this is a finding.

Note: The "key=" value is arbitrary and can be different from the example output above.

Fix Text (F-65080r996735_fix)
Configure SLEM 5 to generate an audit record for all uses of the "ssh-keysign" command. Add or modify the following line in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F path=/usr/lib/ssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=unset -k privileged-ssh-keysign To reload the rules file, restart the audit daemon: > sudo systemctl restart auditd.service or issue the following command: > sudo augenrules --load

Fix Text (F-65080r996735_fix)

Configure SLEM 5 to generate an audit record for all uses of the "ssh-keysign" command.

Add or modify the following line in the "/etc/audit/rules.d/audit.rules" file:

-a always,exit -F path=/usr/lib/ssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=unset -k privileged-ssh-keysign

To reload the rules file, restart the audit daemon:

> sudo systemctl restart auditd.service

or issue the following command:

> sudo augenrules --load