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CVE-2019-1476 is an elevation of privilege vulnerability in the Windows AppX Deployment Service (AppXSVC). The vulnerability arises from improper handling of hard links by AppXSVC, which could allow a local attacker to gain elevated privileges on the system. By exploiting the way AppXSVC processes hard links, an attacker could potentially cause the service to perform privileged operations on files controlled by the attacker.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository is a proof-of-concept (PoC) exploit for CVE-2019-1476, a vulnerability in the Windows AppXSvc service that allows a regular user to overwrite arbitrary files via a hardlink attack. The exploit is implemented in C++ and is structured as a Visual Studio project. The main entry point is 'AppXSvcDoS.cpp', which orchestrates the attack by: 1. Killing the Paint UWP app if running. 2. Deleting existing settings files in the Paint app's settings directory. 3. Creating a hardlink from a user-writable file (e.g., settings.dat.LOG1) to a target file (e.g., C:\Windows\win.ini). 4. Launching the Paint app to trigger the overwrite via AppXSvc. 5. Verifying if the target file was overwritten. The exploit does not allow the attacker to control the content of the overwritten file, limiting its use to denial of service scenarios. The codebase includes utility functions for privilege management, error handling, and native Windows API interactions. The README provides context and references to related vulnerabilities and research. No network or remote attack vectors are present; the exploit is purely local and targets the Windows file system.
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