Detections
Analytics

1.266 OL09-00-002341

Information

OL 9 SSH daemon must not allow Generic Security Service Application Program Interface (GSSAPI) authentication.

GROUP ID: V-271704
RULE ID: SV-271704r1091824

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

Configure the SSH daemon to not allow GSSAPI authentication.

Add or uncomment the following line to "/etc/ssh/sshd_config" or to a file in "/etc/ssh/sshd_config.d" and set the value to "no":

GSSAPIAuthentication no

The SSH service must be restarted for changes to take effect:

$ sudo systemctl restart sshd.service

See Also

https://workbench.cisecurity.org/benchmarks/27024

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-5(1), CCI|CCI-001813, Rule-ID|SV-271704r1091824_rule, STIG-ID|OL09-00-002341, Vuln-ID|V-271704

Plugin: Unix

Control ID: 12d92258312017359ca686c7ee4ccc8917d449fb1e2018af84cacc20c1e17a05