STIGQter: STIG Summary: SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 01 Apr 2026:

SLEM 5 SSH daemon must be configured to not allow authentication using known hosts authentication.

DISA Rule

SV-261340r996483_rule

Vulnerability Number

V-261340

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

SLEM-05-255075

Severity

CAT II

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

Configure SLEM 5 SSH daemon to not allow authentication using "known hosts" authentication.

Add or modify the following line in the "/etc/ssh/sshd_config" file:

IgnoreUserKnownHosts yes

Restart the SSH daemon in order for the changes to take effect:

> sudo systemctl restart sshd.service

Check Contents

Verify SLEM 5 SSH daemon is configured to not allow authentication using "known hosts" authentication with the following command:

> sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*ignoreuserknownhosts'
/etc/ssh/sshd_config:IgnoreUserKnownHosts yes

If "IgnoreUserKnownHosts" is not set to "no", is commented out, missing, or conflicting results are returned, this is a finding.

Vulnerability Number

V-261340

Documentable

False

Rule Version

SLEM-05-255075

Severity Override Guidance

Verify SLEM 5 SSH daemon is configured to not allow authentication using "known hosts" authentication with the following command:

> sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*ignoreuserknownhosts'
/etc/ssh/sshd_config:IgnoreUserKnownHosts yes

If "IgnoreUserKnownHosts" is not set to "no", is commented out, missing, or conflicting results are returned, this is a finding.

Check Content Reference

M

Target Key

5596