STIGQter STIGQter: STIG Summary: Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide Version: 1 Release: 7 Benchmark Date: 01 Jul 2026:

AlmaLinux OS 9 SSH private host key files must have mode 0600 or less permissive.

DISA Rule

SV-269265r1208312_rule

Vulnerability Number

V-269265

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

ALMA-09-020920

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure the mode of SSH private host key files under "/etc/ssh" to "0600" with the following command:

$ chmod 0600 /etc/ssh/ssh_host*key

Restart the SSH daemon for the changes to take effect:

$ systemctl restart sshd.service

Check Contents

Verify the SSH private host key files have a mode of "0600" or less permissive with the following command:

$ stat -c "%#a %n" /etc/ssh/ssh_host*key

0600 /etc/ssh/ssh_host_ecdsa_key
0600 /etc/ssh/ssh_host_rsa_key

If any private host key file has a mode more permissive than "0600", this is a finding.

Vulnerability Number

V-269265

Documentable

False

Rule Version

ALMA-09-020920

Severity Override Guidance

Verify the SSH private host key files have a mode of "0600" or less permissive with the following command:

$ stat -c "%#a %n" /etc/ssh/ssh_host*key

0600 /etc/ssh/ssh_host_ecdsa_key
0600 /etc/ssh/ssh_host_rsa_key

If any private host key file has a mode more permissive than "0600", this is a finding.

Check Content Reference

M

Target Key

5664