An anonymous reader writes from a report via Softpedia: Some Android devices that contain firmware created by Foxconn may be vulnerable via a debugging feature left inside the bootloader, which acts as a backdoor and bypasses authentication procedures for any intruder with USB access to a vulnerable phone. By sending the “reboot-ftm” command to Android devices that contain Foxconn firmware, an attacker would authenticate via USB, and boot the device, running as root with SELinux disabled. There isn’t a list of affected devices available yet, but Jon Sawyer, the researchers that discovered this hidden command, provides instructions on how to detect if a phone is affected. “Due to the ability to get a root shell on a password protected or encrypted device, Pork Explosion would be of value for forensic data extraction, brute forcing encryption keys, or unlocking the boot loader of a device without resetting user data. Phone vendors were unaware this backdoor has been placed into their products,” Sawyer says.

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Source: Slashdot – Android Devices That Contain Foxconn Firmware May Have a Secret Backdoor