CVE-2017-18158

Vulnerability

CVE-2017-18158 describes possible buffer overflows and array out-of-bounds accesses in Android releases from Code Aurora Forum (CAF) using the Linux kernel, specifically Android for MSM, Firefox OS for MSM, and QRD Android, before the security patch level of 2018-06-05. The vulnerability occurs while flashing images, likely in the bootloader or recovery mode code that handles image data [1].

Exploitation

An attacker with the ability to flash a crafted image—such as through physical access, ADB, or a malicious update mechanism—could trigger the buffer overflow by providing an image with specially crafted data that exceeds expected bounds. No authentication is required beyond the ability to initiate a flash operation [1].

Impact

Successful exploitation could lead to arbitrary code execution in the context of the bootloader or recovery environment, potentially allowing persistent compromise of the device, bypass of security mechanisms, or installation of unauthorized firmware [1].

Mitigation

The vulnerability is fixed in the Android security patch level 2018-06-05. Users should ensure their devices have received this update from their manufacturer. No workarounds are documented; updating to the patched version is the recommended mitigation [1].