The SSH daemon must not permit GSSAPI authentication.

From VMware vSphere ESXi 6.0 Security Technical Implementation Guide

Part of SRG-OS-000480-VMM-002000

Associated with: CCI-000366

SV-77695r1_rule The SSH daemon must not permit GSSAPI authentication.

Vulnerability discussion

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.

Check content

To verify the GSSAPIAuthentication setting, run the following command: # grep -i "^GSSAPIAuthentication" /etc/ssh/sshd_config If there is no output or the output is not exactly "GSSAPIAuthentication no", this is a finding.

Fix text

To set the GSSAPIAuthentication setting, add or correct the following line in "/etc/ssh/sshd_config": GSSAPIAuthentication no

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