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CVE-2019-8852 is a memory corruption vulnerability in macOS, addressed in Catalina 10.15.2, Security Update 2019-002 Mojave, and Security Update 2019-007 High Sierra. The flaw allows an application to execute arbitrary code with kernel privileges due to improper memory handling in the kernel.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a proof-of-concept (PoC) exploit for CVE-2019-8852, a kernel vulnerability in macOS 10.15.1 and below. The exploit is written in C and consists of several components: - The main exploit logic is in 'exploit-1/exploit.c', which orchestrates kernel heap manipulation using Mach ports, pipes, and the IOSurface subsystem. - The exploit creates and mounts a FAT32 disk image ('widget.dmg') at '/Volumes/WIDGET/' and manipulates extended attributes (xattr) on files within this mount to trigger the vulnerability. - Supporting libraries in 'mylib/' provide kernel structure offsets, heap spraying, and utility functions for interacting with Mach ports and kernel memory. - The exploit demonstrates a use-after-free (UAF) in the kernel, allowing the creation of fake Mach port and task structures in kernel memory. However, it does not provide a stable kernel task port (tfp0) or full privilege escalation; it is intended for research and will cause a kernel panic as a demonstration. - The entry point is either 'run-exploit.py' (which automates building, mounting, and running the exploit) or 'exploit-1/main.c' (which calls the 'exploit' function). The attack vector is local, requiring the attacker to execute code on the target macOS system. The exploit is a PoC and is not weaponized for real-world attacks. It is intended for security researchers to study the vulnerability and kernel heap manipulation techniques.
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