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CVE-2019-8540 is a memory initialization vulnerability in Apple operating systems (iOS, macOS, tvOS, watchOS) that allowed a malicious application to determine the kernel memory layout. The issue was due to improper memory initialization, which could result in information disclosure about the kernel's memory organization.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a proof-of-concept (POC) exploit for CVE-2019-8540, a kernel stack information leak vulnerability in Apple's IOKit subsystem affecting macOS (<=10.14.3) and iOS (<12.2). The vulnerability is due to improper type conversion in the exportObjectToClient function, which can result in leaking 4 bytes of uninitialized kernel stack memory to user space. The repository consists of a README.md explaining the vulnerability and a single C source file (poc.c) that demonstrates the exploit. The exploit works by interacting with the IOUSBDevice service via IOKit, creating a plugin interface, and repeatedly leaking stack data by reading from a specific offset. The code is a local proof-of-concept and does not provide remote code execution or privilege escalation, but demonstrates the infoleak. The only fingerprintable endpoint is the use of the IOUSBDevice service in IOKit.
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