CVE-2017-0649

Vulnerability

The vulnerability resides in the MediaTek sound driver, a kernel component on Android devices. A local malicious application can trigger an elevation of privilege by exploiting a flaw in this driver, leading to arbitrary code execution within the kernel. The issue affects Android devices with MediaTek chipsets prior to the June 2017 security update [1].

Exploitation

Exploitation requires a local malicious application that first compromises a privileged process, as noted in the Android Security Bulletin [1]. Once the attacker gains elevated privileges, they can leverage the sound driver vulnerability to execute arbitrary code in the kernel context. The exact sequence involves sending crafted inputs to the driver to trigger the flaw.

Impact

Successful exploitation grants the attacker arbitrary code execution at the kernel level, resulting in full compromise of the device. This includes the ability to read and modify sensitive data, install persistent malware, and bypass security mechanisms.

Mitigation

The vulnerability is addressed in the Android security patch level of June 5, 2017 [1]. Users should ensure their devices receive this update. No workarounds are available; applying the vendor-provided patch is the only mitigation.