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Vulnerability Alert

Microsoft DirectShow Pointer Validation Arbitrary Code Execution Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:18610
Version:1
First Published:2009 July 14 17:53 GMT
Last Published:2009 July 14 17:53 GMT
Port: Not available
CVE:CVE-2009-1538
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:9.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.9
 
Version Summary:

Microsoft Windows contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.  Updates are available.

 
 
Description

Microsoft Windows 2000 SP4 and prior, XP SP3 and prior and Windows Server 2003 SP2 and prior contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.

This vulnerability is due to insufficient validation of parameters within QuickTime content by the DirectShow component.  An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to visit a malicious website.  A successful exploit could allow the attacker to execute arbitrary code with the privileges of the user.

Microsoft has confirmed this vulnerability in a security bulletin and released updated software.

 
Warning Indicators

Microsoft DirectShow components of DirectX versions 7.0, 8.1, and 9.0 are vulnerable when running on the following platforms:

  • Windows 2000 SP4 and prior
  • Windows XP SP3 and prior
  • Windows XP Professional x64 Edition SP2 and prior
  • Windows Server 2003 SP2 and prior
  • Windows Server 2003 x64 Edition SP2 and prior
  • Windows Server 2003 for Itanium-based Systems with SP2 and prior
 
IntelliShield Analysis

Attackers have no way to directly exploit this vulnerability, and instead must rely on user participation to accomplish an exploit.  An attacker may provide links to users that direct users to malicious sites, or embed malicious script on public sites that attempt to launch exploits against users visiting the site.

Exploitation could allow the attacker to execute arbitrary code on the vulnerable system with the privileges of the user.  If that user holds Administrator privileges, the attacker could execute code that results in a complete system compromise.  On systems that permit users to run programs only with limited privileges, the impact of an exploit likely decreases, because any executed code would run with restricted privileges.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the July 2009 security bulletin release.  This Cisco bulletin, which assists administrators in identifying or mitigating these vulnerabilities using Cisco devices, is available at the following link: Cisco Applied Mitigation Bulletin: Microsoft Security Bulletin for July 2009.

The update available from Microsoft corrects this vulnerability by improving memory pointer updates.

 
Vendor Announcements

Microsoft has released a security bulletin at the following link: MS09-028

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with the privileges of the user.  If that user holds Administrator privileges, the attacker could completely compromise a vulnerable system.

 
Technical Information

The vulnerability is due to insufficient validation of parameters within QuickTime content by the DirectShow component.  The processing of malicious QuickTime files could trigger a memory error, causing the DirectShow component to improperly update a memory pointer. 

An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a website that contains malicious QuickTime content.  When opened, the website could cause a memory error, resulting in the corruption of memory.  The attacker could leverage the memory corruption to execute arbitrary code with the privileges of the user.

 
Safeguards

Administrators are advised to apply the appropriate updates.

Administrators may consider unregistering or disabling access to the quartz.dll component to prevent the processing of QuickTime content.

Users are advised not to visit websites or follow links that have suspicious characteristics or that cannot be verified as safe.

Users are advised to run applications with the least privileges necessary.

 
Patches/Software

Microsoft customers can obtain updates directly by using the links in the security bulletin.  These updates are also distributed by Windows automatic update features and available on the Windows Update website.  Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.


Signatures
 
Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
19384/1DirectX Pointer Validation VulnerabilityS6882013 Jan 11 
19384/2DirectX Pointer Validation VulnerabilityS6882013 Jan 11 
 
Alert History
 

Initial Release



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Microsoft, Inc.DirectX 7.0 Base | 8.1 Base, a, b | 9.0 Base, a, b, c

Associated Products:
Microsoft, Inc.Windows 2000 Advanced Server Base, rev.2031, rev.2072, rev.2195, SP1, SP2, SP3, SP4 | Datacenter Server Base, SP1, SP2, SP3, SP4 | Professional Base, SP1, SP2, SP3, SP4 | Server Base, SP1, SP2, SP3, SP4
Microsoft, Inc.Windows Server 2003 Datacenter Edition Base, SP1, SP2 | Datacenter Edition, 64-bit (Itanium) Base, SP1, SP2 | Datacenter Edition x64 (AMD/EM64T) Base, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition, 64-bit (Itanium) Base, SP1, SP2 | Enterprise Edition x64 (AMD/EM64T) Base, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition, 64-bit (Itanium) Base, SP1, SP2 | Standard Edition x64 (AMD/EM64T) Base, SP2 | Web Edition Base, SP1, SP2
Microsoft, Inc.Windows XP Home Edition Base, SP1, SP2, SP3 | Professional Edition Base, SP1, SP2, SP3 | Professional x64 (AMD/EM64T) Base, SP2




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The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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