Check Point Advisories

Microsoft RPC Services Path Canonicalization Remote Code Execution (CVE-2008-4250)

Check Point Reference: CPAI-2013-2471
Date Published: 11 Jul 2013
Severity: Critical
Last Updated: Thursday 18 September, 2014
Source:
Industry Reference:CVE-2008-4250
Protection Provided by:

Security Gateway
R81, R80, R77, R75, R71, R70
Who is Vulnerable?
Vulnerability Description The SMB Protocol is a network file sharing protocol that is implemented in Microsoft Windows. There are many known vulnerabilities in applications based on the SMB protocol. Though IDS and IPS devices have signatures to detect attacks exploiting these vulnerabilities, these devices can be evaded. A remote attacker may exploit this vulnerability by sending a specially crafted Create AndX request to an affected server. Successful exploitation would allow attackers to execute arbitrary code on the affected service.

Protection Overview

This protection will detect and block malformed SMB requests.

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

  1. In the IPS tab, click Protections and find the Microsoft RPC Services Path Canonicalization Remote Code Execution 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:  Windows SMB Protection Violation.
Attack Information:  Microsoft RPC Services Path Canonicalization Remote Code Execution

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