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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-77339	SLES-12-020320	SV-92035r3_rule		Low

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-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-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215

STIG	Date
SLES 12 Security Technical Implementation Guide	2019-10-01

Details

Check Text ( C-76895r4_chk )
Verify the SUSE operating system generates an audit record for all uses of the "ssh-keysign" command. Check that the following command call is being audited by performing the following command on the system rules in "/etc/audit/audit.rules": # sudo grep -i ssh-keysign /etc/audit/audit.rules -a always,exit -F path=/usr/lib/ssh/ssh-keysign -F perm=x -F auid>=500 -F auid!=4294967295 -k privileged-ssh-keysign If the command does not return any output or the returned line is commented out, this is a finding.

Check Text ( C-76895r4_chk )

Verify the SUSE operating system generates an audit record for all uses of the "ssh-keysign" command.

Check that the following command call is being audited by performing the following command on the system rules in "/etc/audit/audit.rules":

# sudo grep -i ssh-keysign /etc/audit/audit.rules

-a always,exit -F path=/usr/lib/ssh/ssh-keysign -F perm=x -F auid>=500 -F auid!=4294967295 -k privileged-ssh-keysign

If the command does not return any output or the returned line is commented out, this is a finding.

Fix Text (F-83981r4_fix)
Configure the SUSE operating system to generate an audit record for all uses 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>=500 -F auid!=4294967295 -k privileged-ssh-keysign The audit daemon must be restarted for the changes to take effect. # sudo systemctl restart auditd.service

Fix Text (F-83981r4_fix)

Configure the SUSE operating system to generate an audit record for all uses 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>=500 -F auid!=4294967295 -k privileged-ssh-keysign

The audit daemon must be restarted for the changes to take effect.

# sudo systemctl restart auditd.service