CVE-2026-35421 Windows GDI本地缓冲区溢出漏洞

/* * PoC for CVE-2026-35421 (Conceptual) * This simulates the heap overflow condition in Windows GDI. * Note: Actual exploitation requires bypassing mitigations like ASLR and DEP. */ #include <windows.h> #include <stdio.h> int main() { // Allocate a buffer simulating the vulnerable GDI object HANDLE hHeap = GetProcessHeap(); char* vulnerable_buffer = (char*)HeapAlloc(hHeap, 0, 100); if (vulnerable_buffer == NULL) { printf("Memory allocation failed.\n"); return 1; } // Malicious input designed to overflow the heap buffer // In a real exploit, this would be crafted to control EIP/RIP char malicious_payload[200]; memset(malicious_payload, 0x41, sizeof(malicious_payload)); // Fill with 'A' printf("Simulating trigger for CVE-2026-35421...\n"); // Trigger the overflow (Vulnerable function simulation) // memcpy(vulnerable_buffer, malicious_payload, sizeof(malicious_payload)); // Cleanup HeapFree(hHeap, 0, vulnerable_buffer); printf("PoC execution completed.\n"); return 0; }