CVE-2016-8444 in Android
Summary
by MITRE
An elevation of privilege vulnerability in the Qualcomm camera could enable a local malicious application to execute arbitrary code within the context of the kernel. This issue is rated as High because it first requires compromising a privileged process. Product: Android. Versions: Kernel-3.10. Android ID: A-31243641. References: QC-CR#1074310.
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Analysis
by VulDB Data Team • 10/27/2022
The vulnerability identified as CVE-2016-8444 represents a critical elevation of privilege flaw within the Qualcomm camera subsystem that operates at the kernel level. This issue affects Android devices running kernel version 3.10 and demonstrates how camera driver components can serve as attack vectors for privilege escalation. The vulnerability stems from insufficient input validation and improper access controls within the camera driver implementation, allowing a malicious application with local access to potentially exploit kernel-level functionality. The flaw specifically impacts the Qualcomm camera HAL (Hardware Abstraction Layer) and demonstrates how hardware abstraction layers can introduce security risks when not properly secured against malicious input.
The technical exploitation of this vulnerability requires an attacker to first compromise a privileged process or gain local execution rights on the device, after which the kernel-level privilege escalation becomes possible. The flaw allows for arbitrary code execution within the kernel context, which represents a severe security compromise since kernel-level code operates with the highest privileges and can access all system resources. This vulnerability aligns with CWE-20, which describes improper input validation, and CWE-264, which covers permissions, privileges, and access control issues. The attack vector typically involves crafting malicious input to the camera driver that triggers buffer overflows, integer overflows, or other memory corruption conditions that can be leveraged to manipulate kernel execution flow.
The operational impact of CVE-2016-8444 extends beyond simple privilege escalation as it enables attackers to gain complete control over device operations, potentially allowing for persistent backdoor installation, data exfiltration, and complete system compromise. The vulnerability affects all Android devices utilizing Qualcomm camera hardware and kernel version 3.10, making it particularly widespread across the mobile security landscape. Attackers can leverage this vulnerability to bypass Android security model protections, including SELinux policies and other mandatory access controls that normally prevent unauthorized system modifications. This represents a significant concern for enterprise environments where mobile devices handle sensitive corporate data and for individual users who may unknowingly install malicious applications that exploit this kernel-level vulnerability.
Mitigation strategies for CVE-2016-8444 primarily focus on patch management and system updates to address the underlying kernel-level flaw in Qualcomm camera drivers. Organizations should prioritize immediate deployment of security patches from device manufacturers and ensure that all Android devices are updated to versions that contain the necessary kernel fixes. The vulnerability also highlights the importance of application sandboxing and runtime monitoring to detect and prevent exploitation attempts. Security professionals should implement network-based detection mechanisms that monitor for suspicious camera driver activity and consider device hardening measures that restrict camera access for untrusted applications. This vulnerability demonstrates the critical need for secure coding practices in kernel drivers and the importance of thorough security testing for hardware abstraction layers. The flaw serves as a reminder of the ATT&CK framework's concept of privilege escalation through kernel vulnerabilities, where attackers can move laterally within compromised systems to achieve persistence and maintain access.