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55 lines
1.6 KiB
Python
55 lines
1.6 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2022 sqlmap developers (https://sqlmap.org/)
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See the file 'LICENSE' for copying permission
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"""
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import os
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import string
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from lib.core.common import singleTimeWarnMessage
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from lib.core.enums import PRIORITY
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__priority__ = PRIORITY.LOWEST
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def dependencies():
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singleTimeWarnMessage("tamper script '%s' is only meant to be run against ASP or ASP.NET web applications" % os.path.basename(__file__).split(".")[0])
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def tamper(payload, **kwargs):
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"""
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Unicode-URL-encodes all characters in a given payload (not processing already encoded) (e.g. SELECT -> %u0053%u0045%u004C%u0045%u0043%u0054)
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Requirement:
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* ASP
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* ASP.NET
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Tested against:
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* Microsoft SQL Server 2000
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* Microsoft SQL Server 2005
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* MySQL 5.1.56
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* PostgreSQL 9.0.3
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Notes:
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* Useful to bypass weak web application firewalls that do not unicode URL-decode the request before processing it through their ruleset
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>>> tamper('SELECT FIELD%20FROM TABLE')
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'%u0053%u0045%u004C%u0045%u0043%u0054%u0020%u0046%u0049%u0045%u004C%u0044%u0020%u0046%u0052%u004F%u004D%u0020%u0054%u0041%u0042%u004C%u0045'
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"""
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retVal = payload
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if payload:
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retVal = ""
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i = 0
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while i < len(payload):
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if payload[i] == '%' and (i < len(payload) - 2) and payload[i + 1:i + 2] in string.hexdigits and payload[i + 2:i + 3] in string.hexdigits:
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retVal += "%%u00%s" % payload[i + 1:i + 3]
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i += 3
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else:
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retVal += '%%u%.4X' % ord(payload[i])
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i += 1
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return retVal
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