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V-215381

CAT II (Medium)

The rusersd daemon must be disabled on AIX.

Rule ID

SV-215381r958478_rule

STIG

IBM AIX 7.x Security Technical Implementation Guide

Version

V3R2

CCIs

CCI-000381

Discussion

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.

Check Content

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

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