One day short of a full chain: Part 1 - Android Kernel arbitrary code execution

In a detailed exploration of exploiting vulnerabilities, the text outlines a series of posts by Man Yue Mo that delve into exploiting three specific bugs: a use-after-free vulnerability in Chrome's renderer, a Chromium sandbox escape, and a use-after-free in the Qualcomm msm kernel. These bugs, while originally affecting the beta version of Chrome, also impacted stable versions of the respective software components and were patched by January of the following year. The discussion focuses on the Qualcomm kernel vulnerability, exposing how a mismatch in memory type handling led to a use-after-free condition that could be exploited for arbitrary kernel code execution. The text further describes the intricate process of exploiting this bug, highlighting methods to bypass security mechanisms such as KASLR and Samsung's Realtime Kernel Protection (RKP) by manipulating the memory allocator, gaining control over kernel memory, and setting up arbitrary code execution. This exploitation underscores the persistent security risks in kernel drivers, particularly vendor-specific ones, despite advancements in user space sandboxing on Android devices.