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lighttpd Connection Header Parsing Denial of Service (CVE-2012-5533)


Check Point Reference: CPAI-2012-1287
Date Published:
Source: Lighttpd Project Advisory 56619
Industry Reference(s): CVE-2012-5533
Protection Provided by: Security Gateway
  • R75
Who is Vulnerable?
Lighttpd Project Lighttpd 1.4.1
Vulnerability Description
A denial-of-service vulnerability has been reported in lighttpd.
Vulnerability Details
The vulnerability is due to insufficient validation of certain values. A remote attacker can exploit this vulnerability by sending a specially crafted Connection request to the vulnerable server. Successful exploitation will cause the application to crash, resulting in a denial of service condition.

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

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 lighttpd Connection Header Parsing Denial of Service protection 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: lighttpd Connection Header Parsing Denial of Service