The Root(ing) Of All Evil: Security Holes That Could Compromise Your Mobile Device

Zimperium zLabs presents a technical analysis of a KernelSU v0.5.7 vulnerability that enables a malicious app to gain full root on a rooted Android device by abusing KernelSU’s prctl hook authentication: the attacker manipulates file descriptor ordering so the kernel reads the legitimate manager’s base.apk signature, thereby impersonating the manager and obtaining root. The report details the kernel-side verification flow, the exploit steps and limitations (requires attacker app to run before the legitimate manager), highlights similar authentication weaknesses across rooting tools, and outlines Zimperium’s detection/mitigation capabilities.