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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-227893	GEN005505	SV-227893r505926_rule		Medium

Description
DoD information systems are required to use FIPS 140-2 approved ciphers. SSHv2 ciphers meeting this requirement are 3DES and AES. Satisfies: SRG-OS-000033, SRG-OS-000505, SRG-OS-000555

STIG	Date
Solaris 10 X86 Security Technical Implementation Guide	2020-09-04

Details

Check Text ( C-30055r490084_chk )
Check the SSH daemon configuration for allowed ciphers. # grep -i ciphers /etc/ssh/sshd_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-30043r490085_fix)
Edit /etc/ssh/sshd_config and change or set the Ciphers line to the following. Ciphers aes128-ctr, aes192-ctr, aes256-ctr