STIGQter: STIG Summary: Red Hat Enterprise Linux 7 Security Technical Implementation Guide Version: 3 Release: 3 Benchmark Date: 23 Apr 2021:

The Red Hat Enterprise Linux operating system must audit all uses of the ssh-keysign command.

DISA Rule

SV-204556r603261_rule

Vulnerability Number

V-204556

Group Title

SRG-OS-000042-GPOS-00020

Rule Version

RHEL-07-030780

Severity

CAT II

CCI(s)

• CCI-000135 - The information system generates audit records containing the organization-defined additional, more detailed information that is to be included in the audit records.
• 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 operating system to generate audit records when successful/unsuccessful attempts to use the "ssh-keysign" command occur.

Add or update the following rule in "/etc/audit/rules.d/audit.rules":

-a always,exit -F path=/usr/libexec/openssh/ssh-keysign -F auid>=1000 -F auid!=unset -k privileged-ssh

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

Check Contents

Verify the operating system generates audit records when successful/unsuccessful attempts to use the "ssh-keysign" command occur.

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

# grep -iw /usr/libexec/openssh/ssh-keysign /etc/audit/audit.rules

-a always,exit -F path=/usr/libexec/openssh/ssh-keysign -F auid>=1000 -F auid!=unset -k privileged-ssh

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

Vulnerability Number

V-204556

Documentable

False

Rule Version

RHEL-07-030780

Severity Override Guidance

Verify the operating system generates audit records when successful/unsuccessful attempts to use the "ssh-keysign" command occur.

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

# grep -iw /usr/libexec/openssh/ssh-keysign /etc/audit/audit.rules

-a always,exit -F path=/usr/libexec/openssh/ssh-keysign -F auid>=1000 -F auid!=unset -k privileged-ssh

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

Check Content Reference

M

Target Key

2899

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