CVE-2014-1807 in Windows
Summary
by MITRE
The ShellExecute API in Windows Shell in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 does not properly implement file associations, which allows local users to gain privileges via a crafted application, as exploited in the wild in May 2014, aka "Windows Shell File Association Vulnerability."
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Analysis
by VulDB Data Team • 12/20/2024
The Windows Shell File Association Vulnerability identified as CVE-2014-1807 represents a critical privilege escalation flaw within the Windows operating system's shell component. This vulnerability specifically affects multiple versions of Windows including server and client operating systems from Windows Server 2003 through Windows 8.1, making it one of the most widespread exploits in recent history. The vulnerability stems from improper implementation of the ShellExecute API, which is responsible for handling file associations and executing applications based on file types. Attackers exploited this weakness by crafting malicious applications that could manipulate the file association system to execute arbitrary code with elevated privileges, bypassing standard security mechanisms that typically prevent local users from gaining administrative access.
The technical root cause of this vulnerability lies in the way Windows handles file associations within the shell environment. When a user interacts with a file or application, the system relies on the ShellExecute API to determine which program should handle that specific file type. The flaw occurs when the system fails to properly validate the file association parameters, allowing malicious applications to manipulate the execution context. This improper validation creates an opportunity for privilege escalation attacks where local users can leverage the vulnerability to execute code with higher privileges than originally intended. The vulnerability specifically impacts the Windows Shell component, which is a fundamental part of the operating system's user interface and application execution framework.
The operational impact of this vulnerability is severe and far-reaching, particularly given its exploitation in the wild during May 2014. Security researchers noted that this vulnerability was actively exploited by malware authors who created malicious applications designed to take advantage of the file association flaw. The exploit typically involved creating a malicious file association that would execute with elevated privileges when a user interacted with specific file types or executed certain applications. This allowed attackers to establish persistent access to compromised systems, potentially leading to full system compromise, data exfiltration, and lateral movement within network environments. The vulnerability's exploitation required only local user access, making it particularly dangerous as it could be leveraged by attackers who had already gained initial access to a system through other means.
Organizations affected by this vulnerability should implement immediate mitigations including applying Microsoft security patches, which were released as part of the May 2014 security updates. System administrators should also consider implementing additional security controls such as disabling unnecessary file associations, implementing application whitelisting policies, and monitoring for suspicious file execution patterns. The vulnerability aligns with CWE-15 (Improper Neutralization of Data within a Command) and CWE-78 (Improper Neutralization of Special Elements used in an OS Command) categories, demonstrating the intersection of command injection and privilege escalation vectors. From an ATT&CK framework perspective, this vulnerability maps to techniques such as privilege escalation through exploitation of software vulnerabilities and persistence mechanisms, as attackers could use the elevated privileges to maintain access to compromised systems. Organizations should also consider implementing behavioral monitoring solutions that can detect anomalous file association changes and suspicious shell execution patterns to identify potential exploitation attempts.