Check Point Advisories

Microsoft DirectShow AVI Decoder Buffer Overflow (MS05-050; CVE-2005-2128)

Vulnerability
Protection

Check Point Reference:	CPAI-2005-311
Date Published:	12 Oct 2009
Severity:	High
Last Updated:	Tuesday 23 September, 2014
Source:
Industry Reference:	CVE-2005-2128
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Microsoft DirectX is a set of low-level application programming interfaces (APIs) for creating high-performance multimedia applications. Microsoft DirectShow is an architecture for streaming media on the Microsoft Windows platform and provides for the capture and playback of multimedia streams. It supports a wide variety of formats, including MPEG, AVI, MP3 and WAV. DirectShow is integrated with DirectX technologies. Applications on Windows platforms, such like Microsoft Windows Media Player, can utilize the DirectShow APIs to process multimedia streams. A vulnerability exists in the Microsoft Windows Media Player AVI movie codec. The flaw is created by a lack of validation of certain values contained in AVI movie files. An attacker may exploit this vulnerability to divert the process flow of the vulnerable program. In a successful attack, an attacker can inject code into the vulnerable target. The behaviour of the target is dependent on the malicious code. If such an attack is not executed successfully, the vulnerable application may terminate as a result of the attack attempt. Note that any code executed by the attacker runs with the privileges of the logged in user.

Protection Overview

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

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

In the IPS tab, click Protections and find the Microsoft DirectShow AVI Decoder Buffer Overflow (MS05-050) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Content Protection Violation.
Attack Information: Microsoft DirectShow AVI decoder buffer overflow (MS05-050)