Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on the targeted system. Updates are available.
Microsoft Internet Explorer contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on the targeted system.
The vulnerability is due to improper memory operations performed by Internet Explorer when processing web content. 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.
Microsoft Internet Explorer 8 is 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
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 released a security bulletin at the following link: MS13-021
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on the targeted system with the privileges of the targeted user. If the user holds elevated privileges, the attacker could completely compromise the system.
The vulnerability is due to improper processing of HTML content by Internet Explorer.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to view a malicious website. The processing of content within the malicious website could cause Internet Explorer to access previously uninititialized or removed memory objects, resulting in a use-after-free error that could cause memory corruption. The attacker could leverage the memory corruption to execute arbitrary code on the targeted system with the privileges of the targeted 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.
Home Edition Base, SP1, SP2, SP3 | Professional Edition Base, SP1, SP2, SP3 | Professional x64 (AMD/EM64T) Base, SP1, SP2, SP3
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