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

SLEM 5 must implement DOD-approved encryption to protect the confidentiality of SSH remote connections.

DISA Rule

SV-261334r996467_rule

Vulnerability Number

V-261334

Group Title

SRG-OS-000033-GPOS-00014

Rule Version

SLEM-05-255045

Severity

CAT I

CCI(s)

• CCI-000068 - Implement cryptographic mechanisms to protect the confidentiality of remote access sessions.
• CCI-000877 - Employ strong authentication in the establishment of nonlocal maintenance and diagnostic sessions.
• CCI-001453 - Implement cryptographic mechanisms to protect the integrity of remote access sessions.
• CCI-002890 - Implement organization-defined cryptographic mechanisms to protect the integrity of nonlocal maintenance and diagnostic communications.

Weight

10

Fix Recommendation

Configure the SSH server to only implement FIPS 140-2/140-3 approved ciphers.

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

Ciphers aes256-ctr,aes192-ctr,aes128-ctr

Restart the SSH daemon:

> sudo systemctl restart sshd.service

Check Contents

Verify that SLEM 5 implements DOD-approved encryption to protect the confidentiality of SSH remote connections 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*ciphers'
/etc/ssh/sshd_config:Ciphers aes256-ctr,aes192-ctr,aes128-ctr

If any ciphers other than "aes256-ctr", "aes192-ctr", or "aes128-ctr" are listed, the order differs from the example above, the line is commented out, or the "Ciphers" keyword is missing, or conflicting results are returned, this is a finding.

Vulnerability Number

V-261334

Documentable

False

Rule Version

SLEM-05-255045

Severity Override Guidance

Verify that SLEM 5 implements DOD-approved encryption to protect the confidentiality of SSH remote connections 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*ciphers'
/etc/ssh/sshd_config:Ciphers aes256-ctr,aes192-ctr,aes128-ctr

If any ciphers other than "aes256-ctr", "aes192-ctr", or "aes128-ctr" are listed, the order differs from the example above, the line is commented out, or the "Ciphers" keyword is missing, or conflicting results are returned, this is a finding.

Check Content Reference

M

Target Key

5596