STIGQter STIGQter: STIG Summary: SLES 12 Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 24 Jan 2020: The SUSE operating system must implement DoD-approved encryption to protect the confidentiality of SSH remote connections.

DISA Rule

SV-92151r2_rule

Vulnerability Number

V-77455

Group Title

SRG-OS-000033-GPOS-00014

Rule Version

SLES-12-030170

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Edit the SSH daemon configuration (/etc/ssh/sshd_config) and remove any ciphers not starting with "aes" and remove any ciphers ending with "cbc". If necessary, add a "Ciphers" line:

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

Restart the SSH daemon:

# sudo systemctl restart sshd.service

Check Contents

Verify that the SUSE operating system implements DoD-approved encryption to protect the confidentiality of SSH remote connections.

Check the SSH daemon configuration for allowed ciphers with the following command:

# sudo grep -i ciphers /etc/ssh/sshd_config | grep -v '^#'

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

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

Vulnerability Number

V-77455

Documentable

False

Rule Version

SLES-12-030170

Severity Override Guidance

Verify that the SUSE operating system implements DoD-approved encryption to protect the confidentiality of SSH remote connections.

Check the SSH daemon configuration for allowed ciphers with the following command:

# sudo grep -i ciphers /etc/ssh/sshd_config | grep -v '^#'

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

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

Check Content Reference

M

Target Key

2903

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