mirror of
https://github.com/sqlmapproject/sqlmap.git
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403 lines
13 KiB
Python
403 lines
13 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 socket
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import time
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from difflib import SequenceMatcher
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from lib.core.agent import agent
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from lib.core.common import beep
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from lib.core.common import getUnicode
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from lib.core.common import randomInt
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from lib.core.common import randomStr
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from lib.core.common import readInput
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from lib.core.common import showStaticWords
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from lib.core.common import wasLastRequestError
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from lib.core.common import DynamicContentItem
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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 paths
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from lib.core.exception import sqlmapConnectionException
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from lib.core.exception import sqlmapGenericException
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from lib.core.exception import sqlmapNoneDataException
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from lib.core.exception import sqlmapUserQuitException
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from lib.core.exception import sqlmapSilentQuitException
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from lib.core.session import setString
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from lib.core.session import setRegexp
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from lib.request.connect import Connect as Request
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def checkSqlInjection(place, parameter, value, parenthesis):
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"""
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This function checks if the GET, POST, Cookie, User-Agent
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parameters are affected by a SQL injection vulnerability and
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identifies the type of SQL injection:
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* Unescaped numeric injection
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* Single quoted string injection
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* Double quoted string injection
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"""
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logic = conf.logic
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randInt = randomInt()
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randStr = randomStr()
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prefix = ""
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postfix = ""
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retVal = None
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if conf.prefix or conf.postfix:
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if conf.prefix:
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prefix = conf.prefix
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if conf.postfix:
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postfix = conf.postfix
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for case in kb.injections.root.case:
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positive = case.test.positive
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negative = case.test.negative
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if not prefix and not postfix and case.name == "custom":
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continue
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infoMsg = "testing %s (%s) injection " % (case.desc, logic)
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infoMsg += "on %s parameter '%s'" % (place, parameter)
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logger.info(infoMsg)
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payload = agent.payload(place, parameter, value, positive.format % eval(positive.params))
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trueResult = Request.queryPage(payload, place)
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if trueResult:
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payload = agent.payload(place, parameter, value, negative.format % eval(negative.params))
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falseResult = Request.queryPage(payload, place)
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if not falseResult:
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infoMsg = "%s parameter '%s' is %s (%s) injectable " % (place, parameter, case.desc, logic)
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infoMsg += "with %d parenthesis" % parenthesis
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logger.info(infoMsg)
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if conf.beep:
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beep()
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retVal = case.name
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break
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kb.paramMatchRatio[(place, parameter)] = conf.matchRatio
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return retVal
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def heuristicCheckSqlInjection(place, parameter, value):
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if kb.nullConnection:
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debugMsg = "heuristic checking skipped "
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debugMsg += "because NULL connection used"
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logger.debug(debugMsg)
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return
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prefix = ""
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postfix = ""
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if conf.prefix or conf.postfix:
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if conf.prefix:
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prefix = conf.prefix
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if conf.postfix:
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postfix = conf.postfix
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payload = "%s%s%s" % (prefix, randomStr(length=10, alphabet=['"', '\'', ')', '(']), postfix)
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payload = agent.payload(place, parameter, value, payload)
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Request.queryPage(payload, place, raise404=False)
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result = wasLastRequestError()
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infoMsg = "(error based) heuristics shows that %s " % place
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infoMsg += "parameter '%s' is " % parameter
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if result:
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infoMsg += "injectable (possible DBMS: %s)" % kb.htmlFp[-1]
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logger.info(infoMsg)
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else:
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infoMsg += "not injectable"
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logger.warning(infoMsg)
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def checkDynParam(place, parameter, value):
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"""
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This function checks if the url parameter is dynamic. If it is
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dynamic, the content of the page differs, otherwise the
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dynamicity might depend on another parameter.
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"""
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infoMsg = "testing if %s parameter '%s' is dynamic" % (place, parameter)
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logger.info(infoMsg)
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randInt = randomInt()
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payload = agent.payload(place, parameter, value, getUnicode(randInt))
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dynResult = Request.queryPage(payload, place)
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if True == dynResult:
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return False
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infoMsg = "confirming that %s parameter '%s' is dynamic" % (place, parameter)
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logger.info(infoMsg)
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randInt = randomInt()
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payload = agent.payload(place, parameter, value, getUnicode(randInt))
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dynResult = Request.queryPage(payload, place)
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return not dynResult
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def checkDynamicContent(firstPage, secondPage):
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"""
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This function checks if the provided pages have dynamic content. If they
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are dynamic, proper markings will be made.
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"""
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if kb.nullConnection:
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debugMsg = "dynamic content checking skipped "
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debugMsg += "because NULL connection used"
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logger.debug(debugMsg)
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return
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infoMsg = "searching for dynamic content"
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logger.info(infoMsg)
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blocks = SequenceMatcher(None, firstPage, secondPage).get_matching_blocks()
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kb.dynamicMarkings = []
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i = 0
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while i < len(blocks):
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block = blocks[i]
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(_, _, length) = block
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if length <= conf.minMatchBlock:
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blocks.remove(block)
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else:
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i += 1
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if len(blocks) > 0:
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blocks.insert(0, None)
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blocks.append(None)
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for i in xrange(len(blocks) - 1):
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prefix = firstPage[blocks[i][0]:blocks[i][0] + blocks[i][2]] if blocks[i] else None
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postfix = firstPage[blocks[i + 1][0]:blocks[i + 1][0] + blocks[i + 1][2]] if blocks[i + 1] else None
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if prefix is None and blocks[i + 1][0] == 0:
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continue
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if postfix is None and (blocks[i][0] + blocks[i][2] >= len(firstPage)):
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continue
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kb.dynamicMarkings.append((re.escape(prefix[-conf.dynMarkLength:]) if prefix else None, re.escape(postfix[:conf.dynMarkLength]) if postfix else None))
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if len(kb.dynamicMarkings) > 0:
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infoMsg = "dynamic content marked for removal (%d region%s)" % (len(kb.dynamicMarkings), 's' if len(kb.dynamicMarkings) > 1 else '')
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logger.info(infoMsg)
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def checkStability():
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"""
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This function checks if the URL content is stable requesting the
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same page two times with a small delay within each request to
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assume that it is stable.
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In case the content of the page differs when requesting
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the same page, the dynamicity might depend on other parameters,
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like for instance string matching (--string).
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"""
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infoMsg = "testing if the url is stable, wait a few seconds"
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logger.info(infoMsg)
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firstPage, _ = Request.queryPage(content=True)
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time.sleep(1)
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secondPage, _ = Request.queryPage(content=True)
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conf.seqMatcher.set_seq1(firstPage)
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kb.pageStable = (firstPage == secondPage)
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if kb.pageStable:
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if firstPage:
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logMsg = "url is stable"
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logger.info(logMsg)
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else:
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errMsg = "there was an error checking the stability of page "
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errMsg += "because of lack of content. please check the "
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errMsg += "page request results (and probable errors) by "
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errMsg += "using higher verbosity levels"
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raise sqlmapNoneDataException, errMsg
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else:
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warnMsg = "url is not stable, sqlmap will base the page "
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warnMsg += "comparison on a sequence matcher. If no dynamic nor "
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warnMsg += "injectable parameters are detected, or in case of "
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warnMsg += "junk results, refer to user's manual paragraph "
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warnMsg += "'Page comparison' and provide a string or regular "
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warnMsg += "expression to match on"
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logger.warn(warnMsg)
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message = "how do you want to proceed? [C(ontinue)/s(tring)/r(egex)/q(uit)] "
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test = readInput(message, default="C")
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if test and test[0] in ("q", "Q"):
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raise sqlmapUserQuitException
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elif test and test[0] in ("s", "S"):
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showStaticWords(firstPage, secondPage)
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message = "please enter value for parameter 'string': "
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test = readInput(message)
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if test:
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conf.string = test
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if kb.nullConnection:
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debugMsg = "turning off NULL connection "
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debugMsg += "support because of string checking"
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logger.debug(debugMsg)
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kb.nullConnection = None
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else:
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raise sqlmapSilentQuitException
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elif test and test[0] in ("r", "R"):
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message = "please enter value for parameter 'regex': "
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test = readInput(message)
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if test:
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conf.regex = test
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if kb.nullConnection:
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debugMsg = "turning off NULL connection "
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debugMsg += "support because of regex checking"
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logger.debug(debugMsg)
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kb.nullConnection = None
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else:
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raise sqlmapSilentQuitException
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else:
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checkDynamicContent(firstPage, secondPage)
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if not Request.queryPage():
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errMsg = "target url is too dynamic. unable to continue. consider using other methods"
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logger.error(errMsg)
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raise sqlmapSilentQuitException
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return kb.pageStable
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def checkString():
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if not conf.string:
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return True
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condition = (
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kb.resumedQueries.has_key(conf.url) and
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kb.resumedQueries[conf.url].has_key("String") and
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kb.resumedQueries[conf.url]["String"][:-1] == conf.string
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)
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if condition:
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return True
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infoMsg = "testing if the provided string is within the "
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infoMsg += "target URL page content"
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logger.info(infoMsg)
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page, _ = Request.queryPage(content=True)
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if conf.string in page:
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setString()
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return True
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else:
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errMsg = "you provided '%s' as the string to " % conf.string
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errMsg += "match, but such a string is not within the target "
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errMsg += "URL page content, please provide another string."
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logger.error(errMsg)
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return False
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def checkRegexp():
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if not conf.regexp:
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return True
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condition = (
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kb.resumedQueries.has_key(conf.url) and
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kb.resumedQueries[conf.url].has_key("Regular expression") and
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kb.resumedQueries[conf.url]["Regular expression"][:-1] == conf.regexp
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)
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if condition:
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return True
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infoMsg = "testing if the provided regular expression matches within "
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infoMsg += "the target URL page content"
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logger.info(infoMsg)
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page, _ = Request.queryPage(content=True)
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if re.search(conf.regexp, page, re.I | re.M):
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setRegexp()
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return True
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else:
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errMsg = "you provided '%s' as the regular expression to " % conf.regexp
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errMsg += "match, but such a regular expression does not have any "
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errMsg += "match within the target URL page content, please provide "
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errMsg += "another regular expression."
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logger.error(errMsg)
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return False
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def checkNullConnection():
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"""
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Reference: http://www.wisec.it/sectou.php?id=472f952d79293
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"""
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infoMsg = "testing NULL connection to the target url"
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logger.info(infoMsg)
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try:
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page, headers = Request.getPage(method="HEAD")
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if not page and 'Content-Length' in headers:
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kb.nullConnection = "HEAD"
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infoMsg = "NULL connection is supported with HEAD header"
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logger.info(infoMsg)
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else:
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page, headers = Request.getPage(auxHeaders={"Range":"bytes=-1"})
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if page and len(page) == 1 and 'Content-Range' in headers:
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kb.nullConnection = "Range"
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infoMsg = "NULL connection is supported with GET header "
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infoMsg += "'%s'" % kb.nullConnection
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logger.info(infoMsg)
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except sqlmapConnectionException, errMsg:
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errMsg = getUnicode(errMsg)
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raise sqlmapConnectionException, errMsg
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return kb.nullConnection is not None
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def checkConnection():
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try:
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socket.gethostbyname(conf.hostname)
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except socket.gaierror:
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errMsg = "host '%s' does not exist" % conf.hostname
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raise sqlmapConnectionException, errMsg
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infoMsg = "testing connection to the target url"
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logger.info(infoMsg)
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try:
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Request.getPage()
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except sqlmapConnectionException, errMsg:
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errMsg = getUnicode(errMsg)
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raise sqlmapConnectionException, errMsg
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return True
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