The Photon operating system must configure sshd to disallow Generic Security Service Application Program Interface (GSSAPI) authentication.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-239154	PHTN-67-000083	SV-239154r675270_rule		Medium

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.

STIG	Date
VMware vSphere 6.7 Photon OS Security Technical Implementation Guide	2022-01-03

Details

Check Text ( C-42365r675268_chk )
At the command line, execute the following command: # sshd -T|&grep -i GSSAPIAuthentication Expected result: GSSAPIAuthentication no If the output does not match the expected result, this is a finding.

Fix Text (F-42324r675269_fix)
Open /etc/ssh/sshd_config with a text editor. Ensure that the "GSSAPIAuthentication" line is uncommented and set to the following: GSSAPIAuthentication no At the command line, execute the following command: # service sshd reload