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The Photon operating system must configure sshd to disallow Kerberos authentication.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-256551 | PHTN-30-000082 | SV-256551r887327_rule | Medium |
| Description |
|---|
| If Kerberos is enabled through Secure Shell (SSH), sshd provides a means of access to the system's Kerberos implementation. Vulnerabilities in the system's Kerberos implementation may then be subject to exploitation. To reduce the attack surface of the system, the Kerberos authentication mechanism within SSH must be disabled. |
| STIG | Date |
|---|---|
| VMware vSphere 7.0 vCenter Appliance Photon OS Security Technical Implementation Guide | 2023-02-21 |
Details
| Check Text ( C-60226r887325_chk ) |
|---|
| At the command line, run the following command: # sshd -T|&grep -i KerberosAuthentication Expected result: KerberosAuthentication no If the output does not match the expected result, this is a finding. |
| Fix Text (F-60169r887326_fix) |
|---|
| Navigate to and open: /etc/ssh/sshd_config Ensure the "KerberosAuthentication" line is uncommented and set to the following: KerberosAuthentication no At the command line, run the following command: # systemctl restart sshd.service |