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


Overview

Finding ID Version Rule ID IA Controls Severity
V-22461 GEN005510 SV-63593r1_rule DCNR-1 Medium
Description
DoD information systems are required to use FIPS 140-2 approved ciphers. SSHv2 ciphers meeting this requirement are 3DES and AES.
STIG Date
Oracle Linux 5 Security Technical Implementation Guide 2015-03-26

Details

Check Text ( C-52245r2_chk )
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 (F-54197r1_fix)
Edit the SSH client configuration and remove any ciphers not starting with "3des" or "aes" and remove any ciphers ending with "cbc". If necessary, add a "Ciphers" line.