Mobile Bootloaders From Top Manufacturers Found Vulnerable to Persistent Threats
Sep 06, 2017
Security researchers have discovered several severe zero-day vulnerabilities in the mobile bootloaders from at least four popular device manufacturers that could allow an attacker to gain persistent root access on the device. A team of nine security researchers from the University of California Santa Barbara created a special static binary tool called BootStomp that automatically detects security vulnerabilities in bootloaders. Since bootloaders are usually closed source and hard to reverse-engineer, performing analysis on them is difficult, especially because hardware dependencies hinder dynamic analysis. Therefore, the researchers created BootStomp, which "uses a novel combination of static analysis techniques and underconstrained symbolic execution to build a multi-tag taint analysis capable of identifying bootloader vulnerabilities." The tool helped the researchers discover six previously-unknown critical security bugs across bootloaders from HiSilicon (Huawe...
