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67 lines
1.7 KiB
Python
67 lines
1.7 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2012 sqlmap developers (http://sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
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"""
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import re
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from lib.core.enums import PRIORITY
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__priority__ = PRIORITY.HIGHEST
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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 greater than operator ('>') with 'NOT BETWEEN 0 AND #'
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Example:
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* Input: 'A > B'
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* Output: 'A NOT BETWEEN 0 AND B'
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Tested against:
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* Microsoft SQL Server 2005
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* MySQL 4, 5.0 and 5.5
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* Oracle 10g
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* PostgreSQL 8.3, 8.4, 9.0
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Notes:
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* Useful to bypass weak and bespoke web application firewalls that
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filter the greater than character
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* The BETWEEN clause is SQL standard. Hence, this tamper script
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should work against all (?) databases
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"""
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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 += " "
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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 += " " if i > 0 and not payload[i - 1].isspace() else ""
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retVal += "NOT BETWEEN %s AND" % ('0' if re.search(r"\A[^\w]*\d", payload[i + 1:]) else "NULL")
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retVal += " " if i < len(payload) - 1 and not payload[i + 1:i + 2].isspace() else ""
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continue
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retVal += payload[i]
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return retVal
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