Additional technical information is available regarding the Microsoft Internet Explorer script debugging memory corruption vulnerability.
A vulnerability in Microsoft Internet Explorer could allow an unauthenticated, remote attacker to execute arbitrary code.
The vulnerability is due to improper memory operations performed by the affected software when debugging scripts for crafted content. An unauthenticated, remote attacker could exploit this vulnerability by persuading a user to view a malicious website. A successful exploit could allow the attacker to execute arbitrary code with the privileges of the user. If the user holds elevated privileges, the attacker could completely compromise the system.
Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
Microsoft Internet Explorer versions 9 and 10 are affected when running on the following Microsoft products:
Windows Vista and x64 Edition SP2
Windows Server 2008 for 32-bit Systems SP2
Windows Server 2008 for x64-based Systems SP2
Windows 7 for 32-bit and x64-based Systems SP1
Windows Server 2008 R2 for x64-based Systems SP1
Windows 8 for 32-bit and 64-bit Systems
Windows Server 2012
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site or persuade a user to open a malicious file intended to submit malicious input to the affected software.
Script debugging is not enabled by default; however, users can still debug scripts using the Developer Tools (F12) when using the affected software.
Microsoft has resolved the vulnerability by correcting the way Internet Explorer handles objects in memory.
Microsoft has released a security bulletin at the following link: MS13-047
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with the privileges of the user. If the user holds elevated privileges, the attacker could completely compromise the targeted system.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to view a website designed to cause the browser to process malicious string values. Processing of the string values could cause Internet Explorer to cause an error that could result in memory corruption. The attacker could leverage the memory corruption to execute arbitrary code within the security context of the targeted user.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
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 may consider implementing a group policy to disable the ability to use F12 to access the Developer Tools function.
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 are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.
Administrators are advised to use an unprivileged account when browsing the Internet.
Administrators are advised to monitor critical systems.
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.
Version 1, June 11, 2013, 05:53 PM: Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system. Updates are available.
The security vulnerability applies to the following combinations of products.
9.0 Base | 10.0 Base
for 32-bit systems SP1 | for x64-based systems SP1
Original Release Base
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 | Standard Edition SP2 | Standard Edition, 64-bit SP2 | Web Server SP2 | Web Server, 64-bit SP2
Windows Server 2008 R2
x64-Based Systems Edition SP1 | Itanium-Based Systems Edition SP1
Windows Server 2012
Original Release Base
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
for 32-bit systems Base | for x64-based systems Base
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