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A local privilege escalation vulnerability exists in RealVNC VNC Server versions 6.9.0 through 5.1.0 for Windows. The vulnerability arises because the installer repair operation executes files from the %TEMP% directory with SYSTEM privileges. An attacker with local access can place a malicious executable in %TEMP% prior to a repair operation, resulting in arbitrary code execution as SYSTEM.
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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-2022-27502, a DLL hijacking vulnerability in RealVNC Server up to version 6.9.0 on Windows. The exploit is implemented as a malicious DLL (adsldpc.dll) written in C++. When the DLL is placed in the %TEMP% directory and a repair operation of RealVNC Server is triggered, the DLL is loaded and executes an arbitrary system command (by default, 'whoami'), writing the output to %TEMP%\output.txt. The command to be executed can be changed by modifying line 191 of dllmain.cpp. The repository includes Visual Studio project files, build logs, and the main exploit code in adsldpc/dllmain.cpp. The attack vector is local, requiring the attacker to place the DLL and trigger the repair process. The exploit targets Windows systems running vulnerable versions of RealVNC Server.
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