Check Point Advisories

Microsoft SMB Client Response Parsing Code Execution (MS10-020; CVE-2010-0270)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-081
Date Published:	5 Mar 2012
Severity:	Critical
Last Updated:	Monday 05 March, 2012
Source:
Industry Reference:	CVE-2010-0270
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	The SMB Protocol is a network file sharing protocol that is implemented in Microsoft Windows. A remote code execution vulnerability has been reported in the Microsoft Windows Server Message Block (SMB) client implementation. The vulnerability is due to an error in the Microsoft SMB client implementation that fails to properly validate fields in the SMB response. A remote attacker could exploit this flaw by hosting a malicious SMB server that is designed to exploit this vulnerability and then convince a user to initiate an SMB connection with it. Successful exploitation may allow execution of arbitrary code on the target system.

Protection Overview

This protection will detect and block malformed SMB transaction packets.

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 Microsoft SMB Client Response Parsing Code Execution (MS10-020) 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: Windows SMB Protection Violation.
Attack Information: Microsoft SMB client response parsing code execution (MS10-020)