Check Point Advisories

Microsoft ASN.1 BitString Encoding Attack (MS04-007; CAN-2003-0818)

Check Point Reference: CPAI-2004-07
Date Published: 1 Feb 2005
Severity: High
Last Updated: Tuesday 01 January, 2013
Industry Reference:CAN-2003-0818
Protection Provided by:

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

Who is Vulnerable?
Vulnerability Description

Protection Overview

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 ASN.1 BitString Encoding Attack (MS04-007) 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:  Windows SMB Protection Violation.
Attack Information:  Microsoft ASN.1 BitString encoding attack (MS04-007)

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