CVE-2012-0013 in Windows Embedded
Summary
by MITRE
Incomplete blacklist vulnerability in the Windows Packager configuration in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code via a crafted ClickOnce application in a Microsoft Office document, related to .application files, aka "Assembly Execution Vulnerability."
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Analysis
by VulDB Data Team • 01/05/2025
The vulnerability identified as CVE-2012-0013 represents a critical security flaw in Microsoft Windows operating systems that affects multiple versions including Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2, and Windows 7 Gold and SP1. This vulnerability stems from an incomplete blacklist implementation within the Windows Packager configuration, specifically impacting how the system handles ClickOnce applications embedded within Microsoft Office documents. The flaw allows remote attackers to execute arbitrary code through specially crafted .application files that are part of Office documents, creating a significant attack surface that could be exploited by malicious actors.
The technical root cause of this vulnerability lies in the Windows Packager's insufficient blacklist mechanism that fails to properly identify and block all potentially dangerous file types and execution patterns. According to CWE-20: Improper Input Validation, the system relies on an incomplete list of prohibited file extensions and execution contexts, allowing certain malicious .application files to bypass security restrictions. The vulnerability specifically affects the way Windows processes ClickOnce deployment manifests that are embedded within Office documents, where the system's security checks are inadequate to prevent execution of malicious code. This incomplete blacklist approach creates a false sense of security, as it assumes that blocking certain file types is sufficient protection, when in reality attackers can craft files that exploit the gaps in the validation process.
The operational impact of this vulnerability is severe and far-reaching, as it enables attackers to deliver malicious code through seemingly legitimate Office documents that users might encounter in normal business operations. Attackers can embed crafted .application files within Word, Excel, or PowerPoint documents, which when opened by vulnerable systems can execute arbitrary code with the privileges of the user who opened the document. This creates a significant risk for enterprise environments where users frequently open documents from external sources or through email attachments. The vulnerability is particularly dangerous because it leverages the trust relationship between Office applications and the Windows Packager, allowing attackers to bypass traditional security measures. According to ATT&CK technique T1193, this vulnerability enables adversaries to use malicious documents as initial access vectors, while T1059 demonstrates how the execution of arbitrary code can be achieved through legitimate system processes.
Mitigation strategies for CVE-2012-0013 require a multi-layered approach combining immediate patching with additional security controls. Microsoft released security updates that address the vulnerability by improving the blacklist implementation and strengthening the validation of .application files. Organizations should ensure all affected systems receive the relevant security patches immediately, with particular attention to Windows Server 2003 and Windows Vista systems that may not receive extended support. Network administrators should implement additional controls such as disabling automatic execution of ClickOnce applications, configuring Office applications to prompt users before opening potentially dangerous content, and implementing application whitelisting policies. The vulnerability also highlights the importance of user education regarding suspicious document attachments and the need for regular security awareness training. Additionally, organizations should consider implementing network segmentation and monitoring solutions to detect unusual execution patterns that might indicate exploitation attempts. According to NIST SP 800-160, system administrators should maintain comprehensive inventory of all vulnerable systems and establish incident response procedures specifically addressing this type of vulnerability. The security community has also recommended implementing strict email filtering policies and disabling unnecessary Office features that could be exploited through this attack vector.