AlmaLinux OS 9 SSH daemon must not allow rhosts authentication.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269269 | ALMA-09-021360 | SV-269269r1050151_rule | CCI-000366 | medium |
| Description | ||||
| SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts. | ||||
| STIG | Date | |||
| CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide | 2025-05-22 | |||
Details
Check Text (C-269269r1050151_chk)
Verify the SSH daemon does not allow rhosts authentication with the following command:
$ sshd -T | grep ignorerhosts
ignorerhosts yes
If the "IgnoreRhosts" keyword is set to "no", this is a finding.
Fix Text (F-73201r1048184_fix)
Configure the SSH daemon to not allow rhosts authentication.
Add the following line to "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes":
IgnoreRhosts yes
Alternatively, add the setting to an include file if the line "Include /etc/ssh/sshd_config.d/*.conf" is found at the top of the "/etc/ssh/sshd_config" file:
$ echo 'IgnoreRhosts yes' > /etc/ssh/sshd_config.d/40-rhosts.conf
Restart the SSH daemon for the settings to take effect:
$ systemctl restart sshd.service