Check Point Advisories

Microsoft SMB Server Null Pointer Denial of Service (MS10-012; CVE-2010-0022; CVE-2010-0023)

Vulnerability
Protection

Check Point Reference:	CPAI-2010-028
Date Published:	9 Feb 2010
Severity:	High
Last Updated:	Tuesday 09 February, 2010
Source:
Industry Reference:	CVE-2010-0022 CVE-2010-0023
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 denial of service vulnerability has been reported in the Microsoft Windows Server Message Block (SMB) implementation. The vulnerability is due to insufficient validation by the Microsoft SMB Protocol software of the share and servername fields in malformed SMB packets. A remote attacker could exploit this flaw by constructing a specially crafted SMB packet and sending it to a target server. Successful exploitation could cause a denial of service condition on the affected system.

Protection Overview

This protection will detect and block malformed SMB requests attempting 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 / R71 / R70 / R65

In the IPS tab, click Protections and find the Microsoft SMB Server Null Pointer Denial of Service (MS10-012) 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 server null pointer denial of service (MS10-012)