CVE-2016-7217 in Windows
Summary
by MITRE
Media Foundation in Microsoft Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, and 1607, and Windows Server 2016 allows remote attackers to execute arbitrary code via a crafted web site, aka "Media Foundation Memory Corruption Vulnerability."
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Analysis
by VulDB Data Team • 09/29/2022
The CVE-2016-7217 vulnerability represents a critical memory corruption flaw within Microsoft's Media Foundation component that affects multiple Windows operating systems including Windows 8.1, Windows Server 2012, Windows RT 8.1, Windows 10 versions 1511 and 1607, and Windows Server 2016. This vulnerability resides in the core multimedia framework that processes various media formats and is particularly dangerous because it can be triggered through web-based attacks without requiring any user interaction beyond visiting a malicious website. The flaw stems from improper handling of media files during parsing operations, creating opportunities for remote code execution attacks that align with CWE-125, which describes out-of-bounds read conditions that can lead to memory corruption.
The technical implementation of this vulnerability involves Media Foundation's failure to properly validate input data when processing specially crafted media files embedded within web pages. When a user visits a malicious website containing crafted media content, the Media Foundation component attempts to parse the malformed data without adequate bounds checking or memory validation. This processing error results in memory corruption that can be exploited to overwrite critical memory locations, potentially allowing attackers to inject and execute arbitrary code with the privileges of the affected process. The vulnerability specifically manifests as a heap-based buffer overflow or use-after-free condition that can be leveraged to gain complete system compromise, making it a prime target for advanced persistent threat actors.
From an operational perspective, the impact of CVE-2016-7217 extends beyond simple remote code execution as it represents a significant vector for enterprise compromise. The vulnerability affects widely deployed operating systems including Windows 10 versions that are still in active use, making it particularly dangerous for organizations that have not yet fully migrated to newer versions. Security researchers have identified that this vulnerability maps directly to ATT&CK technique T1059.007, which covers command and script interpreter execution, as attackers can leverage the initial code execution to establish persistent access and escalate privileges. The attack surface is broad since Media Foundation is used across numerous applications and web browsers, including Internet Explorer and Microsoft Edge, providing multiple potential entry points for exploitation.
Organizations must implement comprehensive mitigation strategies that address both immediate remediation and long-term security posture improvements. The primary recommendation involves applying Microsoft's security patches as soon as they become available, which addresses the core memory corruption issue through proper input validation and bounds checking mechanisms. Network segmentation and web filtering solutions should be deployed to limit exposure to potentially malicious websites while implementing strict browser security policies that disable automatic media playback. Additionally, security teams should monitor for indicators of compromise related to this vulnerability through endpoint detection and response systems, particularly focusing on unusual process creation patterns or memory access violations that could indicate exploitation attempts. The vulnerability also highlights the importance of maintaining up-to-date security awareness training for users to recognize potentially malicious web content and avoid visiting untrusted websites that may contain crafted media files designed to exploit this flaw.