CVE-2017-8235 in Android
Summary
by MITRE
In all Android releases from CAF using the Linux kernel, a memory structure in a camera driver is not properly protected.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 12/27/2020
The vulnerability identified as CVE-2017-8235 represents a critical memory protection flaw within the camera driver component of Android devices that utilize Qualcomm's Android Framework (CAF) and operate on Linux kernel architectures. This issue stems from inadequate memory structure protection mechanisms that expose sensitive data and system resources to potential exploitation. The vulnerability affects all Android versions released through the CAF framework, making it a widespread concern across numerous device models and manufacturers. The camera driver in question handles sensitive operations related to image capture, processing, and memory management, creating a potential attack surface for malicious actors seeking to compromise device security.
The technical flaw manifests in the improper protection of memory structures within the camera driver module, specifically within the Linux kernel implementation used by Qualcomm-based Android devices. This memory protection failure allows unauthorized access to kernel-level memory regions that should remain restricted to legitimate system processes. The vulnerability exploits weaknesses in how the driver manages memory allocation, access controls, and privilege boundaries, potentially enabling attackers to read sensitive kernel memory, manipulate driver operations, or escalate privileges to gain root access. The flaw does not require user interaction or specific device conditions to be exploitable, making it particularly dangerous as it can be triggered through normal camera operations or system interactions.
The operational impact of CVE-2017-8235 extends beyond simple data exposure, as it creates opportunities for privilege escalation attacks that can compromise the entire device security model. Attackers can leverage this vulnerability to bypass kernel memory protection mechanisms, potentially accessing confidential information stored in camera driver memory, manipulating image processing operations, or establishing persistent backdoors. The vulnerability's exploitation can lead to complete device compromise, data theft, and unauthorized surveillance capabilities. Given that camera drivers are frequently accessed during normal device operations, the attack surface remains continuously exposed, making this vulnerability particularly concerning for mobile device security.
Mitigation strategies for CVE-2017-8235 require immediate patching of affected Android versions through official security updates from device manufacturers and Google. System administrators should implement comprehensive monitoring for suspicious camera driver activities and memory access patterns that could indicate exploitation attempts. Device manufacturers must ensure proper memory protection mechanisms are in place within their camera driver implementations, including proper access controls, memory isolation, and privilege separation. The vulnerability aligns with CWE-264, which addresses permissions, privileges, and access control issues, and can be categorized under ATT&CK technique T1068, which involves exploiting local privilege escalation vulnerabilities. Organizations should also consider implementing device hardening measures, including kernel module signing, memory protection enforcement, and regular security audits of camera driver components to prevent exploitation attempts and maintain device integrity.