The ntalk daemon must be disabled on AIX.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-215375 | AIX7-00-003070 | SV-215375r958478_rule | CCI-000381 | high |
| Description | ||||
| This service establishes a two-way communication link between two users, either locally or remotely. Unless required the ntalk service will be disabled to prevent attacks. | ||||
| STIG | Date | |||
| IBM AIX 7.x Security Technical Implementation Guide | 2024-08-16 | |||
Details
Check Text (C-215375r958478_chk)
From the command prompt, execute the following command:
# grep "^ntalk[[:blank:]]" /etc/inetd.conf
If there is any output from the command, this is a finding.
Fix Text (F-16571r294577_fix)
In "/etc/inetd.conf", comment out the "ntalk" entry by running command:
# chsubserver -r inetd -C /etc/inetd.conf -d -v 'ntalk' -p 'udp'
Restart inetd:
# refresh -s inetd