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 server must be configured to use only FIPS 140-2/140-3 validated key exchange algorithms.

DISA Rule

SV-261336r996472_rule

Vulnerability Number

V-261336

Group Title

SRG-OS-000250-GPOS-00093

Rule Version

SLEM-05-255055

Severity

CAT I

CCI(s)

CCI-001453 - Implement cryptographic mechanisms to protect the integrity of remote access sessions.

Weight

Fix Recommendation

Configure the SSH server to use only FIPS 140-2/140-3 validated key exchange algorithms.

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

KexAlgorithms ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256

Restart the SSH daemon for changes to take effect:

> sudo systemctl restart sshd.service

Check Contents

Verify that the SSH server is configured to use only FIPS 140-2/140-3 validated key exchange algorithms 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*kexalgorithms'
KexAlgorithms ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256

If "KexAlgorithms" does not contain the list of algorithms in the exact order, is commented out, missing, or conflicting results are returned, this is a finding.

Vulnerability Number

V-261336

Documentable

False

Rule Version

SLEM-05-255055

Severity Override Guidance

Check Content Reference

Target Key

5596