STIGQter: STIG Summary: SUSE Linux Enterprise Server 15 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

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

DISA Rule

SV-234905r622137_rule

Vulnerability Number

V-234905

Group Title

SRG-OS-000037-GPOS-00015

Rule Version

SLES-15-030060

Severity

CAT III

CCI(s)

• CCI-000130 - The information system generates audit records containing information that establishes what type of event occurred.
• CCI-000169 - The information system provides audit record generation capability for the auditable events defined in AU-2 a. at organization-defined information system components.
• CCI-000172 - The information system generates audit records for the events defined in AU-2 d. with the content defined in AU-3.
• CCI-002884 - The organization audits nonlocal maintenance and diagnostic sessions^ organization-defined audit events.

Weight

10

Fix Recommendation

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

Check Contents

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.

Vulnerability Number

V-234905

Documentable

False

Rule Version

SLES-15-030060

Severity Override Guidance

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.

Check Content Reference

M

Target Key

5274

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