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Vulnerability Alert

Microsoft Windows ASF Header Processing Arbitrary Code Execution Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:18970
Version:1
First Published:2009 September 08 20:01 GMT
Last Published:2009 September 08 20:01 GMT
Port: Not available
CVE:CVE-2009-2498
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:9.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.9
Related Resources:
View related IPS Signature
 
 
Version Summary:

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

 
 
Description

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

The vulnerability is due to improper processing of malformed Advanced Systems Format (ASF) file headers.  An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious media file.  If the user views the file, the attacker could execute arbitrary code with the privileges of the user.

Microsoft has confirmed this vulnerability in a security bulletin and released software updates that correct it.

 
Warning Indicators

The following Microsoft systems are vulnerable:

  • 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 Vista SP2 and prior
  • Windows Vista x64 Edition SP2 and prior
  • Windows Server 2008 for 32-bit Systems SP2 and prior
  • Windows Server 2008 for x64-based Systems SP2 and prior

The following Microsoft applications are affected:

  • Windows Media Format SDK version 9.0
  • Windows Media Format SDK version 9.5
  • Windows Media Format SDK x64 Edition version 9.5
  • Windows Media Format SDK version 11
  • Windows Media Services 9.1
  • Windows Media Services 2008
 
IntelliShield Analysis

Attackers have no way to directly exploit this vulnerability and instead rely on user interaction to accomplish an exploit.  An attacker may attempt to convince the user to view a malicious media file by providing links to users in e-mail messages.  Attackers may also attempt to embed malicious content on public or compromised websites in the hopes that users will access those sites on their own.

If an exploit is successful, the attacker could execute arbitrary code with the privileges of the user.  Windows XP systems that grant users Administrator privileges may be at greatest risk because an attacker could execute code resulting in a complete system compromise.  Other systems may be at a reduced risk because users may run applications with reduced privileges.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the September 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 Release for September 2009

The update available from Microsoft corrects this vulnerability by improving the parsing of ASF files.

 
Vendor Announcements

Microsoft has released a security bulletin at the following link: MS09-047

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with the privileges of the user.  If that user holds elevated privileges, the attacker could execute code resulting in a complete system compromise.

 
Technical Information

The vulnerability is due to improper processing of malformed ASF file headers.  The Windows Media Format Runtime wmvcore.dll component fails to properly handle malicious ASF media files.  An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious media file.  The processing of the file could trigger the execution of arbitrary code with the privileges of the user.

 
Safeguards

Administrators are advised to apply the available software updates.

Administrators may consider restricting access to the wmvcore.dll component.

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

Users are advised not to open media files from suspicious or unrecognized sources. If users cannot verify that media files are safe, they are advised not to open them.

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

Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.

 
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
20779/0Windows Media Header Parsing Invalid Free VulnerabilityS4722010 Feb 23 
 
Alert History
 

Initial Release



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

Primary 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 Media Format Runtime 9.0 Base | 9.5 Base | 11 Base
Microsoft, Inc.Windows Media Format Runtime (x64) 9.5 Base
Microsoft, Inc.Windows Media Services 9.1 Base | 2008 Base
Microsoft, Inc.Windows Server 2003 Datacenter Edition Base, SP1, SP2 | Datacenter Edition x64 (AMD/EM64T) Base, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition x64 (AMD/EM64T) Base, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition x64 (AMD/EM64T) Base, SP2 | Web Edition Base, SP1, SP2
Microsoft, Inc.Windows Server 2008 Datacenter Edition Base, SP1, SP2 | Datacenter Edition, 64-bit Base, SP1, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition, 64-bit Base, SP1, SP2 | Essential Business Server Standard Base, SP1, SP2 | Essential Business Server Premium Base, SP1, SP2 | Essential Business Server Premium, 64-bit Base, SP1, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition, 64-bit Base, SP1, SP2 | Web Server Base, SP1, SP2 | Web Server, 64-bit Base, SP1, SP2
Microsoft, Inc.Windows Vista Home Basic Base, SP1, SP2 | Home Premium Base, SP1, SP2 | Business Base, SP1, SP2 | Enterprise Base, SP1, SP2 | Ultimate Base, SP1, SP2 | Home Basic x64 Edition Base, SP1, SP2 | Home Premium x64 Edition Base, SP1, SP2 | Business x64 Edition Base, SP1, SP2 | Enterprise x64 Edition Base, SP1, SP2 | Ultimate x64 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

Associated Products:
N/A




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