The SSH daemon must not permit GSSAPI authentication unless needed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-39280	GEN005524-ESXI5-000104	SV-51096r1_rule		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 ESXi Server 5.0 Security Technical Implementation Guide	2013-09-12

Details

Check Text ( C-46544r1_chk )
Disable lock down mode. Enable the ESXi Shell. Check the SSH daemon configuration for the GSSAPIAuthentication setting. # grep -i GSSAPIAuthentication /etc/ssh/sshd_config | grep -v '^#' If "GSSAPIAuthentication" is set to "yes", this is a finding.' Re-enable lock down mode.

Fix Text (F-44259r1_fix)
Disable lock down mode. Enable the ESXi Shell. Edit the SSH daemon configuration and add/modify the "GSSAPIAuthentication" configuration and set it to "no". # vi /etc/ssh/sshd_config Re-enable lock down mode.