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Vulnerability Alert

Microsoft Windows AVI Movie Processing Arbitrary Code Execution Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:18771
Version:1
First Published:2009 August 11 17:52 GMT
Last Published:2009 August 11 17:52 GMT
Port: Not available
CVE:CVE-2009-1545
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 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.

This vulnerability is due to errors when Windows handles malformed values within AVI header fields.? An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious media file.? If the user opens the file, the attacker could execute code with the privileges of the user.

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

 
Warning Indicators

Systems running the following versions of Microsoft Windows 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 Server 2003 for Itanium-based Systems 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
  • Windows Server 2008 for Itanium-based Systems SP2 and prior
 
IntelliShield Analysis

To exploit this vulnerability, an attacker must convince a user to view a malicious AVI file.? The attacker may provide files to users via e-mail messages, or post malicious media files on public websites.? If the user opens the malicious file, the attacker could execute arbitrary code with the privileges of the user.? On systems that allow users to run applications with the privileges of the Administrator account, the attacker could execute code that results in a complete system compromise.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the?August 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 August 2009

The update available from Microsoft corrects this vulnerability by improving the processing of AVI headers.

 
Vendor Announcements

Microsoft has released a security bulletin at the following link: MS09-038

 
Impact

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

 
Technical Information

This vulnerability is due to errors when Microsoft Windows handles malformed values within AVI header fields by the AVIFile application programming interface (API).  An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious AVI media file.  The processing of the file while a user is viewing the file could allow the attacker to execute arbitrary code with user privileges.

 
Safeguards

Administrators are advised to apply the appropriate updates.

Administrators may consider disabling access to avifil32.dll to prevent the rendering of AVI content.

Users should verify that unsolicited links are safe to follow.

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

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
20182/0Malformed AVI Header VulnerabilityS4242009 Aug 11 
20182/1Malformed AVI Header VulnerabilityS4332009 Sep 11 
 
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, 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 Server 2008 Datacenter Edition Base | Datacenter Edition, 64-bit Base | Itanium-Based Systems Edition Base | Enterprise Edition Base | Enterprise Edition, 64-bit Base | Essential Business Server Standard Base | Essential Business Server Premium Base | Essential Business Server Premium, 64-bit Base | Standard Edition Base | Standard Edition, 64-bit Base | Web Server Base | Web Server, 64-bit Base
Microsoft, Inc.Windows Vista Home Basic Base, SP1 | Home Premium Base, SP1 | Business Base, SP1 | Enterprise Base, SP1 | Ultimate Base, SP1 | Home Basic x64 Edition Base, SP1 | Home Premium x64 Edition Base, SP1 | Business x64 Edition Base, SP1 | Enterprise x64 Edition Base, SP1 | Ultimate x64 Edition Base, SP1
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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