Microsoft Windows contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system.
The vulnerability is due to improper processing of document files by the Windows Graphics Device Interface (GDI) component. An unauthenticated, remote attacker could exploit the vulnerability by convincing a targeted user to view a malicious file. If successful, the attacker could execute arbitrary code and gain complete control over the targeted system.
Microsoft has confirmed this vulnerability in a security bulletin and released software updates.
Indicators of Compromise
The following Microsoft systems are affected:
Windows XP SP3 and prior
Windows XP Professional x64 Edition SP2 and prior
Windows Server 2003 SP2 and prior
Windows Server 2003 x64 Edition SP2 and prior
Windows Server 2003 with SP2 and prior for Itanium-based Systems
Windows Vista SP2 and prior
Windows Vista x64 Edition SP2 and prior
Windows Server 2008 for 32-bit Systems SP2 and prior
Windows Server 2008 for x64-based Systems SP2 and prior
Windows Server 2008 for Itanium-based Systems SP2 and prior
Windows 7 for 32-bit Systems SP1 and prior
Windows 7 for x64-based Systems SP1 and prior
Windows Server 2008 R2 for x64-based Systems SP1 and prior
Windows Server 2008 R2 for Itanium-based Systems SP1 and prior
Windows 8 for 32-bit Systems
Windows 8 for x64-based Systems
Windows 8.1 for 32-bit Systems
Windows 8.1 for x64-based Systems
Windows Server 2012
Windows Server 2012 R2
Windows RT 8.1
The vulnerability is due to improper memory operations when the Windows GDI component processes document files.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to view a malicious Windows Write document. The processing of the file could cause the GDI component to overflow an integer calculation, resulting in the improper assignment of memory resources and possibly corrupting the memory state. The attacker could use the memory corruption to execute arbitrary code on the targeted system with the elevated privileges of the GDI component.
The affected component runs in an elevated security context. The privileges of the user are irrelevant in the result of an exploit because any code execution will run in the elevated security context of the GDI component. Systems on which users hold only limited privileges do not prevent the complete compromise of a system in the event of exploitation.
Administrators are advised to apply the appropriate updates.
Users are advised not to open email messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in email messages are safe, they are advised not to open them.
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.
Microsoft has released a security bulletin at the following link: MS13-089
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.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.