Process Injection: Breaking All macOS Security Layers with a Single Vulnerability
Thijs Alkemade reveals how a single process injection vulnerability in macOS broke code signing, sandboxing, and Transparency Consent and Control (TCC).
Summary
The Multi-Layered macOS Security Architecture
Modern macOS enforces strict security boundaries—including code signing, App Sandbox isolation, Hardened Runtime, and TCC privacy permissions.
Discovering Logic Flaws in Dynamic Linker Environment Handling
Thijs Alkemade investigates how specific system applications handled dynamic library loading and environment variables without proper validation.
Bypassing Sandboxes and Stealing TCC Permissions
Alkemade demonstrates injecting arbitrary dynamic libraries into privileged Apple applications, inheriting their full entitlement set and accessing cameras and microphones.
Apple Remediation and macOS Hardening Lessons
The author reviews Apple's security patches and discusses the broader implications for hardened runtime design in desktop operating systems.
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