The SSH client must be configured to only use FIPS 140-2 approved ciphers.

From SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Associated with: CCI-000068

SV-46015r1_rule The SSH client must be configured to only use FIPS 140-2 approved ciphers.

Vulnerability discussion

DoD information systems are required to use FIPS 140-2 approved ciphers. SSHv2 ciphers meeting this requirement are 3DES and AES.

Check content

Check the SSH client configuration for allowed ciphers. # grep -i ciphers /etc/ssh/ssh_config | grep -v '^#' If no lines are returned, or the returned ciphers list contains any cipher not starting with "3des" or "aes", this is a finding.

Fix text

Edit the SSH client configuration and remove any ciphers not starting with "3des" or "aes". If necessary, add a "Ciphers" line.

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