Check Point Advisories

Microsoft SMB Client Memory Allocation Memory Corruption (MS10-020; CVE-2010-0269)

Vulnerability
Protection

Check Point Reference:	CPAI-2010-064
Date Published:	13 Apr 2010
Severity:	Critical
Last Updated:	Tuesday 13 April, 2010
Source:
Industry Reference:	CVE-2010-0269
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	The SMB Protocol is a network file sharing protocol that is implemented in Microsoft Windows. A elevation of privilege 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 allocate memory when parsing specially crafted SMB responses. 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. Security Gateway: R70 VPN-1 Power/UTM: NGX R65 VPN-1 Power VSX: NGX R65

Protection Overview

This protection will detect and block malformed SMB responses.

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

In the IPS tab, click Protections and find the Microsoft SMB Client Memory Allocation Memory Corruption (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 memory allocation memory corruption (MS10-020)