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The rusersd daemon must be disabled on AIX.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-91391 | AIX7-00-003076 | SV-101489r1_rule | Medium |
| Description |
|---|
| The rusersd service runs as root and provides a list of current users active on a system. An attacker may use this service to learn valid account names on the system. This is not an essential service and should be disabled. |
| STIG | Date |
|---|---|
| IBM AIX 7.x Security Technical Implementation Guide | 2020-02-24 |
Details
| Check Text ( C-90545r1_chk ) |
|---|
| From the command prompt, execute the following command: # grep "^rusersd[[:blank:]]" /etc/inetd.conf If there is any output from the command, this is a finding. |
| Fix Text (F-97589r1_fix) |
|---|
| In "/etc/inetd.conf", comment out the "rusersd" entry by running command: # chsubserver -r inetd -C /etc/inetd.conf -d -v 'rusersd' -p 'udp' Restart inetd: # refresh -s inetd |