Port Authority Edition – Internet Vulnerability Profiling
by Steve Gibson,  Gibson Research Corporation.





Goto Port 110
Probe Port 111
Enter Port: 0-65535
Goto Port 112



Port Authority Database

Port 111

Name: 
sunrpc

Purpose: 
SUN Remote Procedure Call

Description: 
This port is used as a well-defined means for determining the ports upon which other services in the system are running. It is referred to as a "portmapper" because it provides a directory, or "mapping" between available services and their ports. This is similar to Microsoft's infamous DCOM DCE port 135.

Related Ports: 
135




Background and Additional Information:

Port 111 is a security vulnerability for UNIX systems due to the number of vulnerabilities discovered for the portmapper and related RPC services.

The SANS Institute provides a general introduction to the security vulnerabilities associated with port 111.

Remote Procedure Call (RPC) details (the complete specifications)

  http://www.ietf.org/rfc/rfc1057.txt

  http://www.faqs.org/rfcs/rfc1057.html

  http://www.ietf.org/rfc/rfc1833.txt

  http://www.faqs.org/rfcs/rfc1833.html

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