The SUSE operating system must generate audit records for all uses of the ssh-keysign command.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
low	V-234905	SRG-OS-000037-GPOS-00015	SLES-15-030060	SV-234905r958412_rule	2025-02-27	2

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. Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215

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. Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215

ℹ️ Check
Verify the SUSE operating system generates an audit record for all uses of the "ssh-keysign" command. Check that the command is being audited by performing 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 -k privileged-ssh-keysign If the command does not return any output, this is a finding. Note: The "-k" allows for specifying an arbitrary identifier. The string following "-k" does not need to match the example output above.

ℹ️ Check

Verify the SUSE operating system generates an audit record for all uses of the "ssh-keysign" command. Check that the command is being audited by performing 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 -k privileged-ssh-keysign If the command does not return any output, this is a finding. Note: The "-k" allows for specifying an arbitrary identifier. The string following "-k" does not need to match the example output above.

✔️ Fix
Configure the SUSE operating system to generate an audit record for all uses of the "ssh-keysign" command. Add or update the following rules 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!=4294967295 -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

Configure the SUSE operating system to generate an audit record for all uses of the "ssh-keysign" command. Add or update the following rules 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!=4294967295 -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