The rusersd daemon must be disabled on AIX.
An XCCDF Rule
Description
<VulnDiscussion>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.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-215381r508663_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
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