Check Point Advisories

Microsoft ASP.NET and PHP Hash Collision Denial of Service - Specific (CVE-2011-3414)

Vulnerability
Protection

Check Point Reference:	CPAI-2013-033
Date Published:	20 Feb 2013
Severity:	High
Last Updated:	Thursday 09 January, 2025
Source:	CVE-2011-3414
Protection Provided by:	Security Gateway R70 R71 R75
Who is Vulnerable?	Microsoft .NET Framework 4 and prior
Vulnerability Description	A denial of service vulnerability has been reported in Microsoft ASP.NET and PHP. Successful exploitation could degrade performance significantly, possibly resulting in a denial of service condition.
Update/Patch Avaliable	Apply patches from: MS11-100
Vulnerability Details	The vulnerability is caused due to the way common web framework implementations use hash tables to map parameters and values of web requests. A remote attacker may exploit this vulnerability by generating multiple requests containing colliding key values to an affected server.

Protection Overview

IPS will detect and block the transferring of malicious requests to the server.

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

Security Gateway R75 / R71 / R70

In the IPS tab, click Protections and find the Microsoft ASP.NET and PHP Hash Collision Denial of Service - Specific protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:
Attack Name: Web Server Enforcement Violation
Attack Information: Microsoft ASP.NET and PHP Hash Collision Denial of Service - Specific