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

From MAC OSX 10.6 Workstation Security Technical Implementation Guide

Associated with IA controls: DCNR-1

Associated with: CCI-000068

SV-39371r1_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

Open a terminal session and enter the following command. grep -i ciphers /etc/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

Open a terminal session and edit the SSH client configuration file "/etc/ssh_config" and remove any ciphers not starting with "3DES" or "AES".

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