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The SSH client must not permit GSSAPI authentication unless needed.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22474 GEN005525 SV-26767r1_rule ECSC-1 Low
Description
GSSAPI authentication is used to provide additional authentication mechanisms to applications. Allowing GSSAPI authentication through SSH exposes the system’s GSSAPI to remote hosts, increasing the attack surface of the system. GSSAPI authentication must be disabled unless needed.
STIG Date
VMware ESX 3 Server 2016-05-13

Details

Check Text ( C-27776r1_chk )
Check the SSH clients configuration for the GSSAPI authentication setting.
# grep -i GSSAPIAuthentication /etc/ssh/ssh_config | grep -v '^#'
If no lines are returned, or the setting is set to yes, this is a finding.
Fix Text (F-24017r1_fix)
Edit the SSH client configuration and set (add if necessary) a GSSAPIAuthentication directive set to no.