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RHEL 9 must not allow a noncertificate trusted host SSH logon to the system.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-257992 | RHEL-09-255080 | SV-257992r925963_rule | Medium |
| Description |
|---|
| SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts. |
| STIG | Date |
|---|---|
| Red Hat Enterprise Linux 9 Security Technical Implementation Guide | 2023-09-13 |
Details
| Check Text ( C-61733r925961_chk ) |
|---|
| Verify the operating system does not allow a noncertificate trusted host SSH logon to the system with the following command: $ sudo grep -i hostbasedauthentication /etc/ssh/sshd_config HostbasedAuthentication no If the "HostbasedAuthentication" keyword is not set to "no", is missing, or is commented out, this is a finding. If the required value is not set, this is a finding. |
| Fix Text (F-61657r925962_fix) |
|---|
| To configure RHEL 9 to not allow a noncertificate trusted host SSH logon to the system add or modify the following line in "/etc/ssh/sshd_config". HostbasedAuthentication no Restart the SSH daemon for the settings to take effect: $ sudo systemctl restart sshd.service |