CVE-2016-0834 in Android
Summary
by MITRE
An unspecified media codec in mediaserver in Android 6.x before 2016-04-01 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted media file, aka internal bug 26220548.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 09/13/2025
The vulnerability identified as CVE-2016-0834 represents a critical security flaw within the Android media processing framework that affected versions 6.x prior to the 2016-04-01 security patch release. This issue resides in the mediaserver component which serves as the central processing unit for multimedia content handling across the Android operating system. The vulnerability stems from an unspecified media codec implementation that fails to properly validate or sanitize input data from media files, creating a pathway for malicious actors to exploit the system through crafted media content.
The technical nature of this vulnerability manifests as a memory corruption issue that occurs during the processing of media files within the mediaserver environment. When a specially crafted media file is processed by the affected codec, the system's memory management mechanisms become compromised, potentially leading to either arbitrary code execution or denial of service conditions. This type of vulnerability falls under the category of heap-based buffer overflows or memory corruption flaws, which are commonly classified as CWE-121 heap-based buffer overflow and CWE-122 stack-based buffer overflow depending on the specific memory access pattern. The vulnerability's exploitation potential is significantly enhanced because it operates at the system level within the mediaserver process, which typically runs with elevated privileges and has broad access to system resources.
The operational impact of this vulnerability extends far beyond simple system instability, as it provides remote attackers with the capability to execute arbitrary code on affected devices without requiring physical access or user interaction. This makes the vulnerability particularly dangerous in environments where users might unknowingly encounter malicious media content through various channels such as email attachments, messaging applications, web downloads, or even social media platforms. The denial of service aspect can result in complete system crashes or application hangs that render the device unusable until manual intervention occurs. From an attacker's perspective, this vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter and T1489 for service stoppage, as successful exploitation can lead to complete system compromise and persistent access.
The exploitation of this vulnerability demonstrates the inherent risks associated with multimedia processing frameworks in mobile operating systems, where the complexity of supporting multiple media formats creates numerous potential attack surfaces. The affected mediaserver component is designed to handle various media codecs including but not limited to mp4, avi, and other container formats, making the attack surface particularly broad. Security researchers have noted that such vulnerabilities often remain undetected for extended periods due to the complexity of media processing algorithms and the difficulty in properly validating all possible input combinations. The vulnerability's classification as a remote code execution flaw in a system service component places it within the high-risk category of mobile security threats, as it can be exploited through simple media file delivery mechanisms without requiring user interaction or specialized knowledge.
Mitigation strategies for CVE-2016-0834 primarily focus on the immediate application of security patches released by Google as part of their regular security updates for Android 6.0 and later versions. Organizations and individuals should prioritize the installation of the April 2016 security update which specifically addresses this vulnerability through code modifications that improve input validation and memory handling within the mediaserver component. Additional protective measures include implementing network-level filtering to block suspicious media file types, deploying mobile device management solutions that enforce security policies, and conducting regular security assessments of media handling capabilities within the organization's mobile environment. Security professionals should also consider implementing runtime monitoring solutions that can detect anomalous behavior patterns associated with memory corruption exploits, as these systems can provide early warning of potential exploitation attempts. The vulnerability serves as a reminder of the importance of maintaining up-to-date security patches and the critical nature of securing multimedia processing components in mobile operating systems, particularly given the widespread use of smartphones and tablets in enterprise and personal environments where such vulnerabilities can have significant operational and security implications.