Details

This entry starts the rsusersd daemon when required. This service provides a list of current users active on a system.

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.

Solution

In /etc/inetd.conf, comment out the rusersd entry-

chsubserver -r inetd -C /etc/inetd.conf -d -v ‘rusersd’ -p ‘udp’

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/528

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Unix.

References

• 800-53|CM-7b.
• CSCv6|9.1

Source

• Tenable.com/audits