CVE-2017-0566

Vulnerability

The vulnerability resides in the MediaTek camera driver, a kernel module used on Android devices with MediaTek chipsets. Affected versions include all Android builds prior to the April 2017 security patch level (Android ID: A-28470975). The bug allows a local malicious application to execute arbitrary code within the kernel context, but only after the attacker has already compromised a privileged process [1].

Exploitation

An attacker must first compromise a privileged process on the device (e.g., through another vulnerability or social engineering). Once that foothold is established, the attacker can run a malicious app that triggers the camera driver flaw. The exact sequence involves sending crafted IOCTL calls or other driver interactions to exploit the memory corruption or logic error, leading to kernel code execution [1].

Impact

Successful exploitation grants the attacker arbitrary code execution in the kernel, effectively elevating privileges to the highest level on the device. This enables full control over the operating system, including access to sensitive data, modification of system files, and installation of persistent malware [1].

Mitigation

Google released a fix as part of the Android Security Bulletin for April 2017 (patch level 2017-04-01). Users should ensure their devices receive this update. No workaround is available for unpatched devices. The vulnerability is not listed on the CISA Known Exploited Vulnerabilities (KEV) catalog as of the publication date [1].