Check Point Advisories

Multiple Vendors RPC librpc.dll Stack Buffer Overflow (CVE-2009-2754)

Vulnerability
Protection

Check Point Reference:	CPAI-2010-430
Date Published:	17 May 2010
Severity:	Critical
Last Updated:	Monday 17 May, 2010
Source:
Industry Reference:	CVE-2009-2754
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Remote Procedure Call (RPC) is a protocol that a program can use to request a service from a program located on another computer in a network. The librpc.dll handles the RPC protocol parsing. A buffer overflow vulnerability exists in IBM's Informix Dynamic Server and EMC's Legato Networker. The vulnerability is due to insufficient validation of user input during authentication by the RPC protocol parsing library, librpc.dll. the library is used by the Portmapper service (portmap.exe). A remote attacker can exploit this vulnerability to cause stack based buffer overflow which can lead to arbitrary code execution in the context of the affected service.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the Multiple Vendors RPC librpc.dll Stack Buffer Overflow protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: SUN-RPC Enforcement Protection.
Attack Information: Multiple Vendors RPC librpc.dll stack buffer overflow