Home Page | Skip to Navigation | Skip to Content | Skip to Search | Skip to Footer

Update Protection against Microsoft Windows Workstation Service NetrGetJoinInformation Routine Memory Corruption Vulnerability (MS09-041)

Subscribe

Check Point Reference: CPAI-2009-155
Date Published:
Severity:
Last Updated:
Source: Microsoft Security Bulletin MS09-041
Industry Reference(s): CVE-2009-1544
Protection Provided by: Security Gateway
  • R70
VPN-1
  • NGX R65
VSX
  • NGX R65
InterSpect
  • NGX
IPS-1
  • IPS-1
  • IPS-1 NGX R65
Who is Vulnerable?
Windows XP SP2
Windows XP SP3
Windows XP Professional x64 Edition SP2
Windows Server 2003 SP2
Windows Server 2003 x64 Edition SP2
Windows Server 2003 with SP2 (Itanium)
Windows Vista
Windows Vista SP1
Windows Vista SP2
Windows Vista x64 Edition
Windows Vista x64 Edition SP1
Windows Vista x64 Edition SP2
Windows Server 2008 for 32-bit Systems
Windows Server 2008 for 32-bit Systems SP2
Windows Server 2008 for x64-based Systems
Windows Server 2008 for x64-based Systems SP2
Windows Server 2008 (Itanium)
Windows Server 2008 (Itanium) SP2
Vulnerability Description
An elevation of privilege vulnerability has been reported in the Microsoft Windows Workstation Service. Microsoft Windows Workstation Service routes local file system requests and remote file or print network requests via Remote Procedure Call (RPC). RPC is a protocol that a program can use to request a service from another program which is located on another computer in a network. An attacker may exploit this issue to run arbitrary code with elevated privileges on an affected system.
Update/Patch Available
Apply patches:
Microsoft Security Bulletin MS09-041
Vulnerability Details
The vulnerability is due to a possible "Double Free" condition occurring in the service. The "Double Free" condition occurs when an attacker could cause an affected system, while processing a specially crafted program, to try to release or "free" memory that may have been set aside for use multiple times. Releasing memory that has already been freed could lead to memory corruption. The Windows Workstation Service fails to properly allocate and free memory when receiving specially crafted RPC messages. A remote attacker can exploit this issue by specially crafting a malicious RPC request and sending it an affected system, causing the NetrGetJoinInformation routine to incorrectly free a heap pointer. Successful exploitation may allow the attacker to take complete control of a target system.

Protection Overview
This protection will detect and block malformed RPC requests sent to the vulnerable service.

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 > MS-RPC > MS-RPC over CIFS.
2. In the right pane, double-click the Microsoft Workstation Service NetrGetJoinInformation Corruption (MS09-041) 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: MS-RPC Enforcement Violation
Attack Information: Microsoft Workstation Service NetrGetJoinInformation corruption (MS09-041)

VPN-1 NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > MS-RPC > MS-RPC over CIFS > Microsoft Workstation Service NetrGetJoinInformation Corruption (MS09-041).
2. In the configuration pane, under Settings > Mode, check Active.
3. Install policy on all modules.

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

Attack Name: MS-RPC Enforcement Violation
Attack Information: Microsoft Workstation Service NetrGetJoinInformation corruption (MS09-041)

VPN-1 VSX NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > MS-RPC > MS-RPC over CIFS > Microsoft Workstation Service NetrGetJoinInformation Corruption (MS09-041).
2. In the configuration pane, under Settings > Mode, check Active.
3. Install policy on all modules.

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

Attack Name: MS-RPC Enforcement Violation
Attack Information: Microsoft Workstation Service NetrGetJoinInformation corruption (MS09-041)

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 > MS-RPC > MS-RPC over CIFS.
3. Select the following:

Microsoft Workstation Service NetrGetJoinInformation Corruption (MS09-041)

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: MS-RPC Enforcement Violation
Attack Information: Microsoft Workstation Service NetrGetJoinInformation corruption (MS09-041)

IPS-1 & IPS-1 NGX R65

How Can I Protect My Network?
1. In the IPS-1 Policy Manager, click on the Protection tab.
2. In the Protection tree, click Application Intelligence > MS-RPC, and select the WKSSVC NetrJoinDomain2 Overflow (MS06-070) protection group.
3. Click WKSSVC Elevation of Privilege (CVE-2009-1544) (IPS-1 NGX R65 only).
4. In the configuration pane, under Settings, check Active.
5. Click on Install Policy.

How Do I Know if My Network is Under Attack?

Upon attack, the following entries will be logged:

Alert Name: WKSSVC MS06-070 Source
Description: WKSSVC Elevation of Privilege (CVE-2009-1544)