Detections
Analytics

1.51 AZLX-23-001215

Information

Amazon Linux 2023 SSH daemon must not allow Generic Security Service Application Program Interface (GSSAPI) authentication.

GROUP ID: V-274044RULE ID: SV-274044r1120120

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 Amazon Linux 2023 so that the SSH daemon does 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/26107

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-5(1), CAT|II, CCI|CCI-001813, Rule-ID|SV-274044r1120120_rule, STIG-ID|AZLX-23-001215, Vuln-ID|V-274044

Plugin: Unix

Control ID: deb9dbe54b59302e93bad4f54347982f6193b993969fada0fc1d8e9566537d73