The chargen daemon must be disabled on AIX.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-215376	AIX7-00-003071	SV-215376r508663_rule		Medium

Description

This service is used to test the integrity of TCP/IP packets arriving at the destination. This chargen service is a character generator service and is used for testing the integrity of TCP/IP packets arriving at the destination. An attacker may spoof packets between machines running the chargen service and thus provide an opportunity for DoS attacks. Disable this service to prevent attacks unless testing the network.

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2022-06-06

Details

Check Text ( C-16574r294579_chk )
From the command prompt, execute the following command: # grep "^chargen[[:blank:]]" /etc/inetd.conf If there is any output from the command, this is a finding.

Fix Text (F-16572r294580_fix)
In "/etc/inetd.conf", comment out the "chargen" entries by running commands: # chsubserver -r inetd -C /etc/inetd.conf -d -v 'chargen' -p 'tcp' # chsubserver -r inetd -C /etc/inetd.conf -d -v 'chargen' -p 'udp' Restart inetd: # refresh -s inetd