Title

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

Discussion

The pcnfsd service is an authentication and printing program, which uses NFS to provide file transfer services. This service is vulnerable and exploitable and permits the machine to be compromised both locally and remotely. If PC NFS clients are required within the environment, Samba is recommended as an alternative software solution. The pcnfsd daemon predates Microsoft's release of SMB specifications. This service should therefore be disabled to prevent attacks.

Check Content

From the command prompt, execute the following command: # grep "^pcnfsd[[: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 "pcnfsd" entry by running command: # chsubserver -r inetd -C /etc/inetd.conf -d -v 'pcnfsd' -p 'udp' Restart inetd: # refresh -s inetd

Additional Identifiers

Rule ID: SV-215379r508663_rule

Vulnerability ID: V-215379

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.