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V-22456

CAT II (Medium)

The SSH client must be configured to only use the SSHv2 protocol.

Rule ID

SV-45999r1_rule

STIG

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

Version

V1R12

CCIs

CCI-001436

Discussion

SSHv1 is not a DoD-approved protocol and has many well-known vulnerability exploits. Exploits of the SSH client could provide access to the system with the privileges of the user running the client.

Check Content

Check the SSH client configuration for allowed protocol versions.
# grep -i protocol /etc/ssh/ssh_config | grep -v '^#' 
If the returned protocol configuration allows versions less than 2, this is a finding

Fix Text

Edit the /etc/ssh/ssh_config file and add or edit a "Protocol" configuration line not allowing versions less than 2.