Check Point Advisories

Microsoft License Logging Server RPC Call Heap Overflow (MS09-064; CVE-2009-2523)

Check Point Reference: CPAI-2009-286
Date Published: 10 Nov 2009
Severity: Critical
Last Updated: Tuesday 10 November, 2009
Source:
Industry Reference:CVE-2009-2523
Protection Provided by:

Security Gateway
R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description The License Logging service is a tool that was originally designed to help customers manage licenses for the Microsoft server products that are licensed in the Server Client Access License (CAL) model. License Logging service is one of the services used by Windows Small Business Server 2003 or earlier to manage CALs. A remote code execution vulnerability has been discovered in the way that the Microsoft License Logging Server software handles specially crafted RPC packets. The vulnerability is due to an error in the License Logging service that fails to validate the length of a string passed to it through an RPC call. This results in a buffer overflow on the heap. A remote attacker could exploit this vulnerability by sending a specially crafted network message to a computer running the License Logging service. Successful exploitation of this issue could allow the attacker to take complete control of the system.

Protection Overview

This protection will detect and block malformed RPC requests to the License Logging service.

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 / R71 / R70 / R65

  1. In the IPS tab, click Protections and find the Microsoft License Logging Server RPC Call Heap Overflow (MS09-064) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  MS-RPC over CIFS Enforcement Violation.
Attack Information:  Microsoft license logging server RPC call heap overflow (MS09-064)

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