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Vulnerability Alert

Microsoft XML Core Services Memory Corruption Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:26148
Version:5
First Published:2012 August 16 17:52 GMT
Last Published:2012 August 16 17:52 GMT
Port: Not available
CVE:CVE-2012-1889
Urgency:Possible use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:9.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:7.7
Related Resources:
View related IPS Signature
 
 
Version Summary:Microsoft has re-released a security bulletin and software updates to address the Microsoft XML Core Services memory corruption vulnerability.
 
 
Description
Microsoft XML Core Services contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system.

The vulnerability is due to improper memory operations performed by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by persuading a user to view a malicious website. If successful, the attacker could execute arbitrary code on the system.

Functional code that exploits this vulnerability is available as part of the Metasploit framework.

Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
 
Warning Indicators
Microsoft XML Core Services versions 3.0, 4.0, 5.0, and 6.0 are affected when install with the following software or system:
  • Office 2003 SP3 and prior
  • Office 2007 SP3 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 with SP2 for Itanium-based Systems 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
  • Windows 7 for 32-bit Systems SP1 and prior
  • Windows 7 for x64-based Systems SP1 and prior
  • Windows Server 2008 R2 for x64-based Systems SP1 and prior
  • Windows Server 2008 R2 for Itanium-based Systems SP1 and prior
 
IntelliShield Analysis
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.

On Microsoft Server 2003 and 2008 systems, Microsoft Internet Explorer runs in a higher security mode by default. This mode prevents attacks that attempt to exploit the vulnerability, reducing the risk of exploitation on such systems.

Microsoft reports that attacks that target this vulnerability are occurring in the wild. Functional code that exploits this vulnerability is available as part of the Metasploit framework.

Exploits distributed via the Blackhole toolkit have been observed, incorporating exploit code similar to the code available from Metasploit.
 
Vendor Announcements
Microsoft has re-released a security bulletin at the following link: MS12-043

Microsoft has released a security advisory at the following link: KB2719615
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on a targeted system with the privileges of a targeted user. If the user holds elevated privileges, the attacker could completely compromise the system.
 
Technical Information
The vulnerability is due to improper memory operations performed when Microsoft XML Core Services attempts to process malicious input.

An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to view a website that is designed to pass malicious input to the affected software. When processed, the input could cause the software to access previously removed memory objects, resulting in memory corruption. The attacker could use the memory corruption to execute arbitrary code on the system with the privileges of the user.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Users are advised not to open e-mail messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.

Administrators may consider applying the Microsoft FixIt solution.

Administrators are advised to monitor affected systems.

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 Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
1281/0Microsoft XML Core Services Remote Code ExecutionS6562012 Jul 10 
1281/1Microsoft XML Core Services Remote Code ExecutionS6562012 Jul 10 
 
Alert History
 
Version 4, July 14, 2012, 8:09 AM: Microsoft has released a security bulletin and software updates to address the Microsoft XML Core Services memory corruption vulnerability.

Version 3, June 29, 2012, 7:07 PM: Reports indicate that exploitation of the Microsoft XML Core Services memory corruption vulnerability has been observed in the wild.

Version 2, June 18, 2012, 3:15 PM: Functional code that demonstrates an exploit of the Microsoft XML Core Services memory corruption vulnerability is publicly available.

Version 1, June 12, 2012, 2:54 PM: Microsoft XML Core Services contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system. Updates are not available.


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

Primary Products:
Microsoft, Inc.Microsoft XML Core Services 3.0 Base | 4.0 Base, SP1, SP2 | 5.0 Base, SP1 | 6.0 Base

Associated Products:
Microsoft, Inc.Groove 2007 SP2, SP3
Microsoft, Inc.Groove Server 2007 Base, .SP2, .SP3
Microsoft, Inc.Office 2003 Base, SP1, SP2, SP3 | 2007 Base, SP1, SP2, SP3
Microsoft, Inc.Windows 7 for 32-bit systems Base, SP1 | for x64-based systems Base, SP1
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, SP1, SP2 | Datacenter Edition, 64-bit Base, SP1, SP2 | Itanium-Based Systems Edition 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 Server 2008 R2 x64-Based Systems Edition Base, SP1 | Itanium-Based Systems Edition Base, SP1
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




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