Check Point Advisories

Microsoft WINS Service Failed Response Memory Corruption (MS11-035; CVE-2011-1248)

Vulnerability
Protection

Check Point Reference:	CPAI-2011-246
Date Published:	10 May 2011
Severity:	Critical
Last Updated:	Sunday 29 November, 2015
Source:
Industry Reference:	CVE-2011-1248
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	Windows Internet Naming Service (WINS) was designed specifically to support NetBIOS over TCP/IP (NetBT), and is required for any environment in which users access resources that have NetBIOS names. A remote code execution vulnerability has been discovered in Microsoft WINS. The vulnerability is due to a logic error when WINS handles a socket send exception - certain user-supplied values remain within a stack frame and are re-used in another context. A remote attacker can trigger this issue by sending a specially crafted packet to an affected WINS system. Successful exploitation of the vulnerability may allow the attacker to execute arbitrary code on the vulnerable system.

Protection Overview

This protection will detect and block the transferring of malformed WINS 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 / R71 / R70 / R65

In the IPS tab, click Protections and find the Microsoft WINS Service Failed Response Memory Corruption (MS11-035) 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 WINS service failed response memory corruption (MS11-035)