Checking jitter

The only difficult thing about performing time-based SQL Injections is that plague of gamers everywhere, lag. A human can easily sit down and account for lag mentally, taking a string of returned values, and sensibly going over the output and working out that cgris is chris. For a machine, this is much harder; therefore, we should attempt to reduce delay.

We will be creating a script that makes multiple requests to a server, records the response time, and returns an average time. This can then be used to calculate fluctuations in responses in time-based attacks known as jitter.

How to do it…

Identify the URLs you wish to attack and provide to the script through a sys.argv variable:

import requests
import sys
url = sys.argv[1]

values = []

for i in xrange(100): 
  r = requests.get(url)
  values.append(int(r.elapsed.total_seconds()))

average = sum(values) / float(len(values))
print “Average response time for “+url+” is “+str(average)

The following screenshot is an example of the...