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Vulnerability Alert

Microsoft Internet Explorer GetMarkupPtr Use-After-Free Vulnerability

 
Threat Type:CWE-119: Buffer Errors
IntelliShield ID:28481
Version:2
First Published:2013 March 12 17:25 GMT
Last Published:2013 March 25 23:05 GMT
Port: Not available
CVE:CVE-2013-0092
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 is available for the Microsoft Internet Explorer GetMarkupPtr function use-after-free vulnerability.
 
 
Description
Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.

The vulnerability is due to improper memory operations performed by Internet Explorer. An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to view a malicious website. If successful, the attacker could execute arbitrary code on the targeted system with the privileges of the targeted user.

Microsoft confirmed the vulnerability in a security bulletin and released software updates.
 
Warning Indicators
Microsoft Internet Explorer 6, 7, 8, 9, and 10 are vulnerable when running on the following systems:
  • Windows XP SP3 and Professional x64 Edition SP2
  • Windows Server 2003, x64 Edition and Itanium-based Systems SP2
  • Windows Vista and x64 Edition SP2
  • Windows Server 2008 for 32-bit, x64-based Systems and Itanium-based Systems SP2
  • Windows 7 for 32-bit and x64-based Systems SP1 and prior
  • Windows Server 2008 R2 for x64-based and Itanium-based Systems SP1 and prior
  • Windows 8 for 32-bit and 64-bit Systems
  • Windows Server 2012
  • Windows RT
 
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.

Microsoft has corrected this vulnerability by modifying the way that 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 March 2013 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 March 2013
 
Vendor Announcements
Microsoft has released a security bulletin at the following link: MS13-021
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on the targeted system with the privileges of the targeted user. If that user holds elevated privileges, the attacker could completely compromise the targeted system.
 
Technical Information
The vulnerability is due to the improper handling of user-supplied input by the GetMarkupPtr function while processing objects in memory. The vulnerability exists within the execCommand print event, which can be leveraged by an attacker to manipulate a document's elements by forcing a pointer to be reused after it has been freed, resulting in a use-after-free error that could corrupt memory.

An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to view a malicious website within Internet Explorer. When processed, malicious content within the website could cause Internet Explorer to free previously removed or uninitialized memory objects, resulting in a use-after-free condition. The attacker could leverage memory corruption resulting from the use-after-free to execute arbitrary code on the targeted system with the privileges of the targeted 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 configuring Internet Explorer to prompt users before running Active Scripting or ActiveX controls by setting the Internet and Local Intranet security zone settings to High. Alternately, administrators could disable Active Scripting and ActiveX controls in these security zones.

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

Administrators are advised to monitor affected systems.
 
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 Microsoft Update service. 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
2038/0Microsoft Internet Explorer Memory CorruptionS7022013 Mar 13 
 
Alert History
 

Version 1, March 12, 2013, 9:25 AM: Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code. 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 | 8.0 Base | 9.0 Base | 10.0 Base

Associated Products:
Microsoft, Inc.Windows 7 for 32-bit systems Base, SP1 | for x64-based systems Base, SP1
Microsoft, Inc.Windows RT Original Release Base
Microsoft, Inc.Windows Server 2003 Datacenter Edition SP2 | Datacenter Edition, 64-bit (Itanium) SP2 | Datacenter Edition x64 (AMD/EM64T) SP2 | Enterprise Edition SP2 | Enterprise Edition, 64-bit (Itanium) SP2 | Enterprise Edition x64 (AMD/EM64T) SP2 | Standard Edition SP2 | Standard Edition, 64-bit (Itanium) SP2 | Standard Edition x64 (AMD/EM64T) SP2 | Web Edition SP2
Microsoft, Inc.Windows Server 2008 Datacenter Edition SP2 | Datacenter Edition, 64-bit SP2 | Itanium-Based Systems Edition SP2 | Enterprise Edition SP2 | Enterprise Edition, 64-bit SP2 | Essential Business Server Standard SP2 | Essential Business Server Premium SP2 | Essential Business Server Premium, 64-bit SP2 | Standard Edition SP2 | Standard Edition, 64-bit SP2 | Web Server SP2 | Web Server, 64-bit SP2
Microsoft, Inc.Windows Server 2008 R2 x64-Based Systems Edition Base, SP1 | Itanium-Based Systems Edition Base, SP1
Microsoft, Inc.Windows Server 2012 Original Release Base
Microsoft, Inc.Windows Vista Home Basic SP2 | Home Premium SP2 | Business SP2 | Enterprise SP2 | Ultimate SP2 | Home Basic x64 Edition SP2 | Home Premium x64 Edition SP2 | Business x64 Edition SP2 | Enterprise x64 Edition SP2 | Ultimate x64 Edition SP2
Microsoft, Inc.Windows XP Home Edition SP3 | Professional Edition SP3 | Professional x64 (AMD/EM64T) SP2 | Tablet PC Edition SP3 | Media Center Edition SP3
Microsoft, Inc.Windows 8 for 32-bit systems Base | for x64-based systems Base




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