mirror of
https://github.com/sqlmapproject/sqlmap.git
synced 2024-11-25 19:13:48 +03:00
65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
#!/usr/bin/env python
|
|
|
|
"""
|
|
Copyright (c) 2006-2021 sqlmap developers (http://sqlmap.org/)
|
|
See the file 'LICENSE' for copying permission
|
|
"""
|
|
|
|
from lib.core.compat import xrange
|
|
from lib.core.enums import PRIORITY
|
|
|
|
__priority__ = PRIORITY.HIGHEST
|
|
|
|
def dependencies():
|
|
pass
|
|
|
|
def tamper(payload, **kwargs):
|
|
"""
|
|
Replaces instances like 'IFNULL(A, B)' with 'IF(ISNULL(A), B, A)' counterpart
|
|
|
|
Requirement:
|
|
* MySQL
|
|
* SQLite (possibly)
|
|
* SAP MaxDB (possibly)
|
|
|
|
Tested against:
|
|
* MySQL 5.0 and 5.5
|
|
|
|
Notes:
|
|
* Useful to bypass very weak and bespoke web application firewalls
|
|
that filter the IFNULL() function
|
|
|
|
>>> tamper('IFNULL(1, 2)')
|
|
'IF(ISNULL(1),2,1)'
|
|
"""
|
|
|
|
if payload and payload.find("IFNULL") > -1:
|
|
while payload.find("IFNULL(") > -1:
|
|
index = payload.find("IFNULL(")
|
|
depth = 1
|
|
comma, end = None, None
|
|
|
|
for i in xrange(index + len("IFNULL("), len(payload)):
|
|
if depth == 1 and payload[i] == ',':
|
|
comma = i
|
|
|
|
elif depth == 1 and payload[i] == ')':
|
|
end = i
|
|
break
|
|
|
|
elif payload[i] == '(':
|
|
depth += 1
|
|
|
|
elif payload[i] == ')':
|
|
depth -= 1
|
|
|
|
if comma and end:
|
|
_ = payload[index + len("IFNULL("):comma]
|
|
__ = payload[comma + 1:end].lstrip()
|
|
newVal = "IF(ISNULL(%s),%s,%s)" % (_, __, _)
|
|
payload = payload[:index] + newVal + payload[end + 1:]
|
|
else:
|
|
break
|
|
|
|
return payload
|