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


Finding ID Version Rule ID IA Controls Severity
V-239154 PHTN-67-000083 SV-239154r675270_rule Medium
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.
VMware vSphere 6.7 Photon OS Security Technical Implementation Guide 2022-06-17


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