CVE-2017-0686 in Android
Summary
by MITRE
A denial of service vulnerability in the Android media framework. Product: Android. Versions: 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2. Android ID: A-34231231.
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Analysis
by VulDB Data Team • 12/31/2020
The vulnerability identified as CVE-2017-0686 represents a critical denial of service flaw within the Android media framework that affects multiple versions of the operating system including Android 6.0, 6.0.1, 7.0, 7.1.1, and 7.1.2. This issue resides in the media server component responsible for handling multimedia content processing and playback operations. The vulnerability stems from improper input validation and handling within the media framework's parsing mechanisms, specifically when processing crafted media files or streams. The Android ID A-34231231 indicates this was tracked as a significant security concern within Google's internal vulnerability management system, highlighting the potential for widespread impact across affected devices. The media framework serves as a central component for managing audio and video content, making this vulnerability particularly concerning as it could disrupt core multimedia functionality.
The technical exploitation of CVE-2017-0686 occurs when maliciously crafted media files are processed by the Android media server, causing the system to enter an unrecoverable state or crash entirely. This flaw manifests through buffer overflows or memory corruption issues that arise during the parsing of malformed media containers or codecs. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, which occurs when the media framework attempts to copy data into a fixed-length buffer without proper bounds checking. Attackers can leverage this weakness by constructing specially crafted media files or streaming content that triggers the vulnerable code path within the media server daemon. The exploitation mechanism typically involves sending malicious media content through various channels including email attachments, web downloads, or malicious applications that utilize the Android media framework for content processing.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the overall stability and usability of affected Android devices. When exploited, the denial of service condition can cause the media server to crash repeatedly, leading to complete loss of multimedia functionality including audio playback, video streaming, and camera recording capabilities. Users may experience complete system instability where the device becomes unresponsive or requires manual rebooting to restore normal operation. This vulnerability affects not only individual user experience but also enterprise environments where Android devices are used for business-critical applications. The impact is particularly severe given that the media framework is integral to core Android functionality, meaning that exploitation could render devices unusable for extended periods until the system is rebooted or patched.
Mitigation strategies for CVE-2017-0686 focus primarily on applying the official security patches released by Google as part of their regular security updates. Organizations should implement immediate patch management procedures to ensure all affected devices receive the necessary updates through the Android security bulletin cycle. Network administrators should consider implementing content filtering mechanisms to prevent the delivery of potentially malicious media files through enterprise networks, particularly when dealing with email attachments or web downloads. The vulnerability demonstrates the importance of secure coding practices and input validation within system components that process external data. Security teams should also consider implementing monitoring solutions to detect abnormal media server behavior or frequent crashes that might indicate exploitation attempts. This vulnerability aligns with ATT&CK technique T1499.001 which involves network denial of service attacks, and reflects the broader category of privilege escalation and system stability attacks that threaten mobile device security. Organizations should also consider device hardening measures and application sandboxing to limit the potential impact of such vulnerabilities on overall system integrity.