Check Point Advisories

Blaster Attacks (CVE-2003-0352)

Check Point Reference: CPAI-0000-000
Date Published: 7 Sep 2007
Severity: Critical
Last Updated: 29 Apr 2015
Industry Reference:CVE-2003-0352
Protection Provided by:

Security Gateway
R77, R76, R75, R71, R70

Who is Vulnerable?
Vulnerability Description Buffer overflow in a certain DCOM interface for RPC in Microsoft Windows NT 4.0, 2000, XP, and Server 2003 allows remote attackers to execute arbitrary code via a malformed message, as exploited by the Blaster, MSblast, LovSAN, Nachi, and Welchia worms.

Protection Overview

This protection blocks DCE-RPC requests for Opnums 4 or 0 that contain: 0x5c005c00 and do not contain 0x5c or 0x00000000, such that the distance between the first and last is bigger than 32 bytes. It also blocks DCE-RPC requests for Opnums 4 or 0 that contain: 0x5c005c00 and 0x43002400 at a distance of at least 58, and contain 0x0000 at a distance bigger than 35 bytes.

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

Protection tab and select the version of your choice.

Security Gateway R77 / R76 / R75 / R71 / R70

  1. In the IPS tab, click Protections and find the Blaster Attacks protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

SmartView Tracker will log the following entries:

Attack Name:  DCE-RPC Enforcement Violation.
Attack Information:  Blaster attack blocked

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