Update Protection against Microsoft WINS Buffer Allocation Integer Overflow Vulnerability (MS09-039)

Vulnerability
Protection

Check Point Reference:	CPAI-2009-147
Date Published:
Severity:
Last Updated:
Source:	Microsoft Security Bulletin MS09-039
Industry Reference(s):	CVE-2009-1924
Protection Provided by:	Security Gateway R70 VPN-1 NGX R65 VSX NGX R65 InterSpect NGX
Who is Vulnerable? Microsoft Windows 2000 SP4 Windows Server 2003 SP2 Windows Server 2003 x64 Edition SP2 Windows Server 2003 with SP2 (Itanium)
Vulnerability Description A remote code execution vulnerability has been discovered in Microsoft WINS. 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 attacker can exploit this vulnerability to take complete control over an affected system.

Update/Patch Available Apply patches: Microsoft Security Bulletin MS09-039
Vulnerability Details The vulnerability is due to an error in WINS that fails to properly validate and restrict buffer lengths passed to the heap. An attacker can trigger this issue by sending a specially crafted network packet to an affected WINS server. 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 malformed WINS network packets.

In order for the protection to be activated, update your Security Gateway/VPN-1/InterSpect product to the latest IPS/SmartDefense update. For information on how to update IPS/SmartDefense, go to SBP-2006-05, Protection tab and select the version of your choice.

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R70

How Can I Protect My Network?
1. In the IPS tab, click Protections > By Protocol > Application Intelligence > Microsoft Networks.
2. In the right pane, double-click the Microsoft WINS Buffer Allocation Integer Overflow (MS09-039) protection.
3. In the Protection Details window, click on Edit. Choose the protection's Action (Override IPS Policy with: Prevent/Detect), and apply Additional Settings.
4. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:

Attack Name: Microsoft WINS Protection Violation
Attack Information: Microsoft WINS buffer allocation integer overflow (MS09-039)

VPN-1 NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > Microsoft Networks > Microsoft WINS Buffer Allocation Integer Overflow (MS09-039).
2. In the configuration pane, under Settings > Mode, check Active.
3. Install policy on all modules.

VPN-1 VSX NGX R65

InterSpect NGX

How Can I Protect My Network?
1. In the left pane, select Profiles > Default Protection and select the SmartDefense page of the profile.
2. In the SmartDefense tree, click Application Intelligence > Microsoft Networks.
3. Select the following:

Microsoft WINS Buffer Allocation Integer Overflow (MS09-039)

4. Install policy on all modules.

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