CVE-2017-0820 in Android
Summary
by MITRE
A vulnerability in the Android media framework (n/a). Product: Android. Versions: 7.0, 7.1.1, 7.1.2, 8.0. Android ID: A-62187433.
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Analysis
by VulDB Data Team • 01/15/2021
The vulnerability identified as CVE-2017-0820 resides within the Android media framework, specifically targeting the stagefright component that handles multimedia processing and playback. This flaw affects multiple Android versions including 7.0, 7.1.1, 7.1.2, and 8.0, representing a significant security gap that could be exploited across a broad range of mobile devices. The vulnerability was classified under the Android ID A-62187433, indicating its severity and the need for immediate attention from device manufacturers and end users.
The technical flaw manifests in the improper handling of malformed media files within the Android media framework, particularly when processing certain multimedia containers. Attackers can craft malicious media files that trigger buffer overflows or memory corruption issues during the parsing process. This vulnerability operates at the kernel level within the media framework, allowing for privilege escalation and potentially full system compromise. The issue stems from inadequate input validation and memory management practices when processing media data streams, creating opportunities for attackers to execute arbitrary code with system-level privileges.
The operational impact of CVE-2017-0820 extends beyond simple media playback manipulation, as it enables attackers to gain unauthorized access to sensitive device functions and data. An attacker could potentially deliver malicious media content through various channels including email attachments, text messages, web downloads, or social media platforms, without requiring user interaction beyond opening the media file. The vulnerability's exploitation capabilities align with the attack pattern described in the ATT&CK framework under privilege escalation techniques, specifically targeting the kernel and system services. This makes the vulnerability particularly dangerous as it can be leveraged for persistent access to devices, data exfiltration, and further network reconnaissance.
Mitigation strategies for this vulnerability require immediate patching and updates from device manufacturers, as the flaw exists in core system components that cannot be easily isolated. Android security patches addressing this issue should be applied promptly across all affected versions, with particular attention to the stagefright component and related media processing libraries. Organizations should implement network-level protections including media file scanning and filtering to prevent delivery of malicious content. The vulnerability's classification under CWE-121, which describes buffer overflow conditions, underscores the importance of proper memory management practices and input validation. Security teams should also consider implementing device monitoring solutions that can detect anomalous media processing behaviors and potential exploitation attempts, as the vulnerability's exploitation may not always be immediately apparent to users.