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A buffer over-read vulnerability exists in NXP LPC55S69 devices prior to revision A3. When the device is in USB In-System Programming (ISP) mode, a specially crafted GET Descriptor Configuration request with a manipulated wlength value can trigger a buffer over-read, resulting in the disclosure of protected flash memory contents.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides proof-of-concept (PoC) exploit code for CVE-2021-40154, a buffer over-read vulnerability in the USB In-System Programming (ISP) mode of NXP LPC55S69 (RevA2) and Kinetis K82 microcontrollers. The vulnerability allows an attacker with physical access to the device in ISP mode to send specially crafted USB control requests, causing the device to return up to 16KB (LPC55S69) or 64KB (K82) of protected flash memory. The repository contains two main Python scripts, 'LPC_USB.py' and 'K82_USB.py', each targeting one of the affected microcontrollers. These scripts use the 'pyusb' library to communicate with the device over USB, issue the exploitative requests, and save the leaked memory data to local files. The repository also includes binary firmware dumps ('K82.bin', 'LPC.bin') and a detailed README.md explaining the vulnerability, affected devices, exploitation steps, and technical background. The exploit is a local PoC requiring physical access to the device and is not weaponized for remote or automated attacks.
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