Functional code that exploits the Microsoft Internet Explorer SLayoutRun use-after-free arbitrary code execution vulnerability is publicly available.
Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system with the privileges of the user.
The vulnerability is due to improper memory operations when processing malicious HTML content. An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious website. If successful, the attacker could execute arbitrary code on the system with the privileges of the user.
Functional code that exploits this vulnerability is publicly available.
Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
Microsoft Internet Explorer version 8 is vulnerable when running on the following Microsoft systems:
Windows XP SP3
Windows XP Professional x64 Edition SP2
Windows Server 2003 SP2
Windows Server 2003 x64 Edition SP2
Windows Vista SP2
Windows Vista x64 Edition SP2
Windows Server 2008 for 32-bit Systems SP2
Windows Server 2008 for x64-based Systems SP2
Windows Server 2008 R2 for x64-based Systems SP1 and prior
Windows Server 2008 R2 for Itanium-based Systems SP1 and prior
Windows 7 for 32-bit Systems SP1 and prior
Windows 7 for x64-based Systems SP1 and prior
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious website and use misleading language or instructions to persuade the user to follow the provided link.
Microsoft has released a security bulletin at the following link: MS13-009
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on a targeted system with the privileges of the user. If the user holds elevated privileges, the attacker could execute code that results in a complete system compromise.
The vulnerability is due to improper memory operations when processing malicious HTML content in Internet Explorer. The affected application could release a CParaElement node, but a reference is kept in CDoc. This reference can be reused when a CDoc relayout is performed. This action results in a use-after-free error that could corrupt memory.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious website. Processing the malicious data could trigger a memory corruption condition that the attacker could use to execute arbitrary code on the system with the privileges of the user.
Administrators are advised to apply the appropriate updates.
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.
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 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.
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, February 12, 2013, 1:43 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.
for 32-bit systemsBase, SP1 | for x64-based systemsBase, SP1 | Datacenter EditionSP2 | Datacenter Edition, 64-bit (Itanium)SP2 | Datacenter Edition x64 (AMD/EM64T)SP2 | Enterprise EditionSP2 | Enterprise Edition, 64-bit (Itanium)SP2 | Enterprise Edition x64 (AMD/EM64T)SP2 | Standard EditionSP2 | Standard Edition, 64-bit (Itanium)SP2 | Standard Edition x64 (AMD/EM64T)SP2 | Web EditionSP2 | Datacenter EditionSP2 | Datacenter Edition, 64-bitSP2 | Enterprise EditionSP2 | Enterprise Edition, 64-bitSP2 | Essential Business Server StandardSP2 | Essential Business Server PremiumSP2 | Essential Business Server Premium, 64-bitSP2 | Standard EditionSP2 | Standard Edition, 64-bitSP2 | Web ServerSP2 | Web Server, 64-bitSP2 | x64-Based Systems EditionBase, SP1 | Itanium-Based Systems EditionBase, SP1 | Home BasicSP2 | Home PremiumSP2 | BusinessSP2 | EnterpriseSP2 | UltimateSP2 | Home Basic x64 EditionSP2 | Home Premium x64 EditionSP2 | Business x64 EditionSP2 | Enterprise x64 EditionSP2 | Ultimate x64 EditionSP2 | Home EditionSP3 | Professional EditionSP3 | Professional x64 (AMD/EM64T)SP2 | Tablet PC EditionSP3 | Media Center EditionSP3
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the
Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service.
This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.