Check Point Advisories

Microsoft Windows PGM Fragment Handling Denial of Service (MS08-036; CVE-2008-1441)

Check Point Reference: CPAI-2008-080
Date Published: 13 Jun 2008
Severity: High
Last Updated: Monday 09 April, 2018
Industry Reference:CVE-2008-1441
Protection Provided by:

Security Gateway
R81, R80, R77, R75, R71, R70, R65

Who is Vulnerable?
Vulnerability Description PGM is a reliable and scalable multicast protocol that enables receivers to detect loss, request retransmission of lost data, or notify an application of unrecoverable loss. The vulnerability is due to the PGM's parsing code that fails to properly handle malformed PGM packets that contain an invalid fragment option. A remote attacker could trigger this flaw via a specially crafted PGM packet. Successful exploitation of this issue may create a denial of service condition, causing the system to become non-responsive.

Protection Overview

This protection will detect and block malformed PGM packets.

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, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75 / R71 / R70 / R65

  1. In the IPS tab, click Protections and find the Microsoft Windows PGM Fragment Handling Denial of Service (MS08-036) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  ICMP Protocol Violation.
Attack Information:  Microsoft Windows PGM fragment handling denial of service (MS08-036)

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