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The AIX SSH daemon must not allow RhostsRSAAuthentication.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-91749 | AIX7-00-002123 | SV-101847r1_rule | 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 | 2020-02-24 |
Details
| Check Text ( C-90903r1_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-97947r1_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 |