Update Protection against Microsoft Windows CSRSS LPC_PORT_CLOSED Information Disclosure Vulnerability (MS11-010)

Vulnerability
Protection

Check Point Reference:	CPAI-2011-080
Date Published:
Severity:
Source:	Microsoft Security Bulletin MS11-010
Industry Reference(s):	CVE-2011-0030
Protection Provided by:	Security Gateway R75 R71 R70 VPN-1 NGX R65 VSX NGX R65
Who is Vulnerable? 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)
Vulnerability Description An elevation of privilege vulnerability has been reported in the way that the Windows Client/Server Run-time Subsystem (CSRSS) terminates a process when a user logs off. The Client/Server Run-time Subsystem (CSRSS) is the user-mode portion of the Win32 subsystem. CSRSS is an essential subsystem that must be running at all times. CSRSS is responsible for console windows, and creating and/or deleting threads. An attacker who successfully exploited this vulnerability could run code designed to monitor the actions of a user who subsequently logged on to the system.

Update/Patch Available Apply patches: Microsoft Security Bulletin MS11-010
Vulnerability Details The vulnerability is due to the way that the Windows CSRSS processes LPC_PORT_CLOSED from user processes. This would allow malicious processes to stay running when the user has logged out of the system. A local attacker can exploit this issue to keep the process running while logged out, potentially allowing information disclosure.

Protection Overview
This protection will detect and block attempts to exploit this vulnerability.

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 R75

How Can I Protect My Network?
1. In the IPS tab, click Protections > By Protocol > IPS Software Blade > Application Intelligence > Content Protection.
2. In the right pane, double-click the Microsoft Windows CSRSS LPC_PORT_CLOSED Information Disclosure (MS11-010) 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: Content Protection Violation
Attack Information: Microsoft Windows CSRSS LPC_PORT_CLOSED information disclosure (MS11-010)

Security Gateway: R70/R71

How Can I Protect My Network?
1. In the IPS tab, click Protections > By Protocol > Application Intelligence > Content Protection.
2. In the right pane, double-click the Microsoft Windows CSRSS LPC_PORT_CLOSED Information Disclosure (MS11-010) 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: Content Protection Violation
Attack Information: Microsoft Windows CSRSS LPC_PORT_CLOSED information disclosure (MS11-010)

VPN-1 NGX R65 & VSX NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > Content Protection > Microsoft Windows CSRSS LPC_PORT_CLOSED Information Disclosure (MS11-010).
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: Content Protection Violation
Attack Information: Microsoft Windows CSRSS LPC_PORT_CLOSED information disclosure (MS11-010)

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