The AIX SSH daemon must not allow RhostsRSAAuthentication.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-215305 | AIX7-00-002123 | SV-215305r991591_rule | CCI-000366 | medium |
| Description | ||||
| If SSH permits rhosts RSA authentication, a user may be able to log in based on the keys of the host originating the request and not any user-specific authentication. | ||||
| STIG | Date | |||
| IBM AIX 7.x Security Technical Implementation Guide | 2024-08-16 | |||
Details
Check Text (C-215305r991591_chk)
Check the SSH daemon configuration for the "RhostsRSAAuthentication" setting by running:
# grep -i RhostsRSAAuthentication /etc/ssh/sshd_config | grep -v '^#'
The above command should yield the following output:
RhostsRSAAuthentication no
If the setting is present and set to "yes", this is a finding.
Fix Text (F-16501r294367_fix)
Edit the "/etc/ssh/sshd_config file", add the following line, and save the change:
RhostsRSAAuthentication no
Restart the SSH daemon:
# stopsrc -s sshd
# startsrc -s sshd