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Microsoft Telnet and WinHTTP Multiple Services Denial of Service

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Check Point Reference: CPAI-2011-352
Date Published:
Severity:
Source: IPS Research Team
Protection Provided by: Security Gateway
  • R75
Who is Vulnerable?
Microsoft Windows 2000
Microsoft Windows Vista
Microsoft Windows XP
Microsoft Windows Server 2003
Microsoft Windows Server 2008
Vulnerability Description
Multiple Denial of Service (DoS) vulnerabilities have been reported in Microsoft Windows Telnet and WinHTTP. Remote attackers can trigger these vulnerabilities by sending specially crafted malicious requests to the affected services. Successful exploitation of these vulnerabilities may lead to a DoS condition, which may cause the server to become unresponsive.
Vulnerability Details
The vulnerabilities are due to a design flaw in Microsoft Telnet's and WinHTTP's user authentication mechanism. Successful exploitation of these vulnerabilities may lead to a DoS condition, which may cause the server to become unresponsive.

Protection Overview
This protection will detect and block attempts to exploit these vulnerabilities.

In order for the protection to be activated, update your product to the latest update. For information on how to update , 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 / R71 / R70

How Can I Protect My Network?
1. In the IPS tab, click Protections and find the Microsoft Telnet and WinHTTP Multiple Services Denial of Serviceprotection using the Search tool and Edit the protection's settings.
2. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:
Attack Name: Web Server Enforcement Violation
Attack Information: Microsoft Telnet and WinHTTP multiple services denial of service