Vulnerability Alert

Microsoft DirectShow Field Size Validation Arbitrary Code Execution Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:18611
Version:1
First Published:2009 July 14 18:12 GMT
Last Published:2009 July 14 18:12 GMT
Port: Not available
CVE:CVE-2009-1539
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.

 
 
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 exists due to insufficient boundary restrictions by DirectShow.  An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to visit a malicious website.  An 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

An attacker cannot directly exploit this vulnerability, and instead must rely upon user participation in order to accomplish an exploit.  An attacker may attempt to embed malicious content on compromised websites that launch exploits against users who visit those sites.  Attackers may also attempt to convince users to visit malicious sites by sending links within e-mail messages to users.

If an exploit is successful, the attacker could execute arbitrary code with the privileges of the user.  Exploitation on systems that allow users to run programs with Administrator privileges could result in a complete compromise.  However, the impact is likely to be less on systems that only allow users to run programs with limited privileges, as any executed code would run in a restricted security context.

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 properly checking the size of parameters within QuickTime content.

 
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 the user holds elevated privileges, the attacker could execute code resulting in a complete system compromise.

 
Technical Information

This vulnerability exists due to insufficient boundary restrictions on fields contained within QuickTime content processed by the DirectX DirectShow quartz.dll component.  An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious website.  The processing of the malicious content could allow the attacker to execute arbitrary code with the privileges of the user.

 
Safeguards

Administrators are advised to apply the available software updates.

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

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

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

 
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
19383/0DirectX Size Validation VulnerabilityS4142009 Jul 14 
19383/1DirectX Size Validation VulnerabilityS4492009 Nov 19 
19384/0DirectX Pointer Validation VulnerabilityS6882013 Jan 11 
19384/3DirectX Pointer Validation VulnerabilityS4332009 Sep 11 
19384/4DirectX Pointer Validation VulnerabilityS5042010 Jul 29 
 
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, SP1




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