CVE-2016-6703 in Android
Summary
by MITRE
A remote code execution vulnerability in an Android runtime library in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-11-01 could enable an attacker using a specially crafted payload to execute arbitrary code in the context of an unprivileged process. This issue is rated as High due to the possibility of remote code execution in an application that uses the Android runtime. Android ID: A-30765246.
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Analysis
by VulDB Data Team • 09/30/2022
The vulnerability identified as CVE-2016-6703 represents a critical remote code execution flaw within the Android runtime library that affected multiple versions of the Android operating system. This vulnerability specifically targeted Android versions 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before the November 1, 2016 security update. The flaw existed in the underlying runtime environment that executes applications on Android devices, creating a pathway for attackers to gain unauthorized code execution privileges. The vulnerability's classification as High severity stems from its potential to allow remote attackers to execute arbitrary code within the context of unprivileged processes, effectively bypassing normal security boundaries that protect user data and system integrity.
The technical nature of this vulnerability involves a flaw in how the Android runtime handles certain input parameters or memory operations within the application execution environment. Attackers could craft malicious payloads designed to exploit specific behaviors in the runtime library that would trigger unexpected code execution paths. This typically involves manipulating memory structures or input validation mechanisms that are part of the Android application framework's core functionality. The vulnerability leverages weaknesses in the runtime's handling of application components, potentially through improper bounds checking, memory management issues, or insufficient input sanitization that allows attackers to inject malicious code into running processes. The exploitation requires minimal privileges and can be executed remotely, making it particularly dangerous for mobile applications that process untrusted data from network sources or user inputs.
The operational impact of CVE-2016-6703 extends beyond individual device compromise to potentially affect entire application ecosystems that rely on the affected Android runtime components. Applications running on vulnerable Android versions could be exploited to gain unauthorized access to device resources, execute malicious code, or potentially escalate privileges to higher levels within the system. This vulnerability creates opportunities for attackers to perform actions such as data exfiltration, device control, or deployment of additional malware. The remote execution capability means that attackers do not need physical access to devices or local network presence to exploit this vulnerability, making it particularly concerning for mobile applications that handle sensitive data or provide network-based services. The vulnerability affects applications that utilize the standard Android runtime libraries, potentially impacting thousands of applications across affected Android versions.
Mitigation strategies for CVE-2016-6703 primarily focus on immediate system updates and patch management procedures. Organizations and users must ensure that all affected Android devices receive the appropriate security patches released by Google and device manufacturers. The vulnerability requires patching of the Android runtime library components, which typically involves updating the operating system to versions that contain the necessary fixes. Security teams should implement comprehensive patch management policies that prioritize critical vulnerabilities like this one, especially when dealing with enterprise devices or applications handling sensitive information. Additional defensive measures include network monitoring for suspicious traffic patterns, application sandboxing to limit potential impact, and regular security assessments of mobile applications to identify potential exploitation vectors. The vulnerability aligns with CWE-119 which addresses improper restriction of operations within a memory buffer, and relates to ATT&CK technique T1059 for command and scripting interpreter, highlighting the need for robust runtime protection mechanisms and application security controls.