Kleopatra versions before 3.1.12 and before 20.07.80 improperly handle command-line options supplied through openpgp4fpr URLs. An attacker can abuse the Qt platformpluginpath command-line option to cause Kleopatra to load an arbitrary DLL, resulting in arbitrary code execution.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository demonstrates a proof-of-concept (POC) exploit for CVE-2020-24972, a vulnerability in Qt5-based applications (such as Kleopatra) that allows arbitrary DLL loading via the --platformpluginpath command line option. The exploit consists of a malicious DLL (dllmain.cpp) that, when loaded, displays a message box, serving as a stand-in for arbitrary code execution. The ReadMe.md explains the vulnerability and provides context, including references to related CVEs and blog posts. The hack.html file demonstrates how a custom URI handler (e.g., openpgp4fpr) can be abused to trigger the vulnerable application to load a DLL from a network share (e.g., \\10.14.14.136\met) via an iframe. The repository targets Windows systems with Qt5 applications that register custom URI schemes and accept the --platformpluginpath parameter. The main attack vectors are local (command line invocation) and network (UNC path DLL loading).
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