Hidden Fastboot OEM Commands Allow Unauthorized Bootloader Lock/Unlock on OxygenOS

CVE-2017-5626 · HIGH Severity

AV:N/AC:L/AU:N/C:C/I:C/A:C

OxygenOS before version 4.0.2, on OnePlus 3 and 3T, has two hidden fastboot oem commands (4F500301 and 4F500302) that allow the attacker to lock/unlock the bootloader, disregarding the 'OEM Unlocking' checkbox, without user confirmation and without a factory reset. This allows for persistent code execution with high privileges (kernel/root) with complete access to user data.

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