Title

The chargen daemon must be disabled on AIX. (Cat II impact)

Discussion

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.

Check Content

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

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

Additional Identifiers

Rule ID: SV-215376r508663_rule

Vulnerability ID: V-215376

Group Title: SRG-OS-000095-GPOS-00049

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.