PHTN-67-000083 - The Photon operating system must configure sshd to disallow Generic Security Service Application Program Interface (GSSAPI) authentication.

Information

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.

Solution

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

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_VMW_vSphere_6-7_Y23M07_STIG.zip