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53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2026 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 re
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from lib.core.common import singleTimeWarnMessage
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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.LOW
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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.ORACLE))
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def tamper(payload, **kwargs):
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"""
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Replaces single-quoted strings with Oracle alternative-quoted strings (e.g. 'abc' -> q'[abc]')
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Requirement:
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* Oracle 10g+
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Tested against:
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* Oracle 11g, 12c, 18c, 19c, 21c, 23ai
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Notes:
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* Useful to bypass filters that block, strip or escape the single-quote
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character: q-quoting delimits the literal with a chosen bracket/char
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so the inner text needs no quote at all
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* The first delimiter whose characters are absent from the literal is
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used; a literal that contains every candidate delimiter is left untouched
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>>> tamper("SELECT 'abc' FROM DUAL")
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"SELECT q'[abc]' FROM DUAL"
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"""
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def _quote(match):
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value = match.group(1)
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for start, end in (("[", "]"), ("{", "}"), ("(", ")"), ("<", ">"), ("!", "!"), ("|", "|"), ("#", "#")):
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if start not in value and end not in value:
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return "q'%s%s%s'" % (start, value, end)
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return match.group(0)
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retVal = payload
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if payload:
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retVal = re.sub(r"'([^']*)'", _quote, payload)
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return retVal
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