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V-256547

CAT II (Medium)

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

Rule ID

SV-256547r991589_rule

STIG

VMware vSphere 7.0 vCenter Appliance Photon OS Security Technical Implementation Guide

Version

V1R4

CCIs

CCI-000366

Discussion

GSSAPI authentication is used to provide additional authentication mechanisms to applications. Allowing GSSAPI authentication through Secure Shell (SSH) exposes the system's GSSAPI to remote hosts, increasing the attack surface of the system.

Check Content

At the command line, run 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

Navigate to and open:

/etc/ssh/sshd_config

Ensure the "GSSAPIAuthentication" line is uncommented and set to the following:

GSSAPIAuthentication no

At the command line, run the following command:

# systemctl restart sshd.service