sqlmap/tamper/multiplespaces.py at master · getcode2git/sqlmap · GitHub

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#!/usr/bin/env python

"""

See the file 'doc/COPYING' for copying permission

"""

import random

import re

from lib.core.data import kb

from lib.core.enums import PRIORITY

__priority__ = PRIORITY.NORMAL

def dependencies():

pass

def tamper(payload, **kwargs):

"""

Adds multiple spaces around SQL keywords

Notes:

* Useful to bypass very weak and bespoke web application firewalls

that has poorly written permissive regular expressions

Reference: https://www.owasp.org/images/7/74/Advanced_SQL_Injection.ppt

>>> random.seed(0)

>>> tamper('1 UNION SELECT foobar')

'1 UNION SELECT foobar'

"""

retVal = payload

if payload:

words = set()

for match in re.finditer(r"[A-Za-z_]+", payload):

word = match.group()

if word.upper() in kb.keywords:

words.add(word)

for word in words:

retVal = re.sub("(?<=\W)%s(?=[^A-Za-z_(]|\Z)" % word, "%s%s%s" % (' ' * random.randrange(1, 4), word, ' ' * random.randrange(1, 4)), retVal)

retVal = re.sub("(?<=\W)%s(?=[(])" % word, "%s%s" % (' ' * random.randrange(1, 4), word), retVal)

return retVal

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