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Vulnerability Alert

Microsoft Internet Explorer innerHTML Remote Code Execution Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:25563
Version:2
First Published:2012 April 10 17:31 GMT
Last Published:2012 April 25 15:47 GMT
Port: Not available
CVE:CVE-2012-0170
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:9.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.9
 
Version Summary:

Additional technical information to describe the Microsoft Internet Explorer innerHTML remote code execution vulnerability is available.

 
 
Description

Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a vulnerable system.

The vulnerability is due to errors when Internet Explorer accesses deleted objects.? An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on a vulnerable system by enticing a user to visit a crafted website.

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

 
Warning Indicators

The following Microsoft products are affected:

  • Internet Explorer 6 for Windows XP SP3 and prior
  • Internet Explorer 6 for Windows XP Professional x64 Edition SP2 and prior
  • Internet Explorer 6 for Windows Server 2003 SP2 or prior
  • Internet Explorer 6 for Windows Server 2003 x64 Edition SP2 and prior
  • Internet Explorer 6 for Windows Server 2003 for Itanium-based Systems SP2 and prior
  • Internet Explorer 7 for Windows XP SP3 or prior
  • Internet Explorer 7 for Windows XP Professional x64 Edition SP2 and prior
  • Internet Explorer 7 for Windows Server 2003 SP2 and prior
  • Internet Explorer 7 for Windows Server 2003 for Itanium-based Systems SP2 and prior
  • Internet Explorer 7 for Windows Vista SP2 and prior
  • Internet Explorer 7 for Windows Vista x64 Edition SP2 and prior
  • Internet Explorer 7 for Windows Server 2008 for 32-bit Systems SP2 and prior
  • Internet Explorer 7 for Windows Server 2008 for x64-based Systems SP2 and prior
  • Internet Explorer 7 for Windows Server 2008 for Itanium-based Systems SP2 and prior
 
IntelliShield Analysis

To exploit the vulnerability, the attacker may provide a file or a link to a malicious website and use misleading language or instructions to persuade the user to open the file or follow the provided link.

Microsoft has corrected this vulnerability by modifying the way Internet Explorer handles objects in memory.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the?April 2012 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?April 2012.

 
Vendor Announcements

Microsoft has released a security bulletin at the following link: MS12-023

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on a targeted system.? If successful, the attacker could execute the code in the context of the user who is logged in.? If this user holds administrative privileges, a complete system compromise could occur.

 
Technical Information

The vulnerability exists due to a use-after-free error that can be triggered when processing the innerHTML property of a body element.  If the property is modified using Javascript, an object that represents the document is freed; however, a reference to that object remains.

An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to open a malicious web page.  Processing such web pages could cause the application to use the object reference to execute arbitrary code on the targeted system.

 
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.

Users should verify that unsolicited links are safe to follow.

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 Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
1132/0Microsoft IE OnReadyStateChange Remote Code ExecutionS6402012 Apr 10 
 
Alert History
 

Version 1, April 10, 2012, 12:31 PM: Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to execute code on a targeted system.  Updates are available.



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

Primary Products:
Microsoft, Inc.Internet Explorer 6.0 Base, SP1, SP2 | 7.0 Base

Associated Products:
Microsoft, Inc.Windows Server 2003 Datacenter Edition Base, SP1, SP2 | Datacenter Edition, 64-bit (Itanium) Base, SP1, SP2 | Datacenter Edition x64 (AMD/EM64T) Base, SP1, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition, 64-bit (Itanium) Base, SP1, SP2 | Enterprise Edition x64 (AMD/EM64T) Base, SP1, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition, 64-bit (Itanium) Base, SP1, SP2 | Standard Edition x64 (AMD/EM64T) Base, SP1, 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 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 Edition, 64-bit (Itanium) Base, 2003 (itanium 2), SP1, SP2 | Professional x64 (AMD/EM64T) Base, SP1, SP2




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