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Workaround for Microsoft Windows ISATAP IPv6 Source Address Spoofing Vulnerability (MS10-029)

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Check Point Reference: SBP-2010-17
Date Published:
Severity:
Source: Microsoft Security Bulletin MS10-029
Industry Reference(s): CVE-2010-0812
Protection Provided by: Security Gateway
  • R70
VPN-1
  • NGX R65
VSX
  • NGX R65
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
A spoofing vulnerability has been reported in Microsoft Windows due to the way that Windows checks the inner packet's IPv6 source address in a tunneled ISATAP packet. The Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) provides IPv6 connectivity within an IPv4 Intranet. A remote attacker may exploit this vulnerability to impersonate another user or system which could allow source address filters to be bypassed.
Update/Patch Available
Apply patches:
Microsoft Security Bulletin MS10-029
Vulnerability Details
The vulnerability is due to an error in the Windows TCP/IP stack that fails properly check the source IPv6 address in a tunneled ISATAP packet. An attacker may exploit this vulnerability by creating network packets with a specially crafted IPv6 source address in an ISATAP connection that does not match the corresponding IPv4 source address. Successful exploitation of this spoofing vulnerability may allow attackers to impersonate an IP address in order to bypass edge or host firewalls.

Protection Overview
This protection will detect and block malformed IPv6 encapsulated packets where the IPv4 source address does not match the IPV6 source address.

In order for the protection to be activated, update your Security Gateway/VPN-1 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 > Network Security > IP and ICMP.
2. In the right pane, double-click the Microsoft Windows ISATAP IPv6 Source Address Spoofing 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: IPv6 Protocol Violation
Attack Information: Microsoft Windows ISATAP IPv6 source address spoofing

VPN-1 NGX R65 & VPN-1 VSX NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Network Security > IP and ICMP.
2. Select the following protection:

Microsoft Windows ISATAP IPv6 Source Address Spoofing

3. In the configuration pane, under Settings > Mode, check Active.
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: IPv6 Protocol Violation
Attack Information: Microsoft Windows ISATAP IPv6 source address spoofing

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 Network Security > IP, and select the Encapsulation protection group.
3. Click Microsoft ISATAP IPv6 Source Address Spoofing Vulnerability (MS10-029) (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: Encapsulation
Description: Microsoft ISATAP IPv6 Source Address Spoofing Vulnerability (MS10-029)