#!/usr/bin/env python """ $Id$ Copyright (c) 2006-2010 sqlmap developers (http://sqlmap.sourceforge.net/) See the file 'doc/COPYING' for copying permission """ import re import socket import time from difflib import SequenceMatcher from lib.core.agent import agent from lib.core.common import beep from lib.core.common import extractRegexResult from lib.core.common import getUnicode from lib.core.common import popValue from lib.core.common import pushValue from lib.core.common import randomInt from lib.core.common import randomStr from lib.core.common import readInput from lib.core.common import removeDynamicContent from lib.core.common import showStaticWords from lib.core.common import trimAlphaNum from lib.core.common import wasLastRequestDBMSError from lib.core.common import DynamicContentItem from lib.core.data import conf from lib.core.data import kb from lib.core.data import logger from lib.core.data import paths from lib.core.datatype import advancedDict from lib.core.datatype import injectionDict from lib.core.enums import HTTPMETHOD from lib.core.enums import NULLCONNECTION from lib.core.enums import PAYLOAD from lib.core.enums import PLACE from lib.core.exception import sqlmapConnectionException from lib.core.exception import sqlmapGenericException from lib.core.exception import sqlmapNoneDataException from lib.core.exception import sqlmapSiteTooDynamic from lib.core.exception import sqlmapUserQuitException from lib.core.session import setString from lib.core.session import setRegexp from lib.core.unescaper import unescaper from lib.request.connect import Connect as Request from lib.request.templates import getPageTemplate def unescape(string, dbms): if dbms in unescaper and "WAITFOR DELAY " not in string: return unescaper[dbms](string) else: return string def unescapeDbms(payload, injection, dbms): # If this is a DBMS-specific test (dbms), sqlmap identified the # DBMS during previous a test (injection.dbms) or the user # provided a DBMS (conf.dbms), unescape the strings between single # quotes in the payload if injection.dbms is not None: payload = unescape(payload, injection.dbms) elif dbms is not None: payload = unescape(payload, dbms) elif conf.dbms is not None: payload = unescape(payload, conf.dbms) return payload def checkSqlInjection(place, parameter, value): # Store here the details about boundaries and payload used to # successfully inject injection = injectionDict() # Set the flag for sql injection test mode kb.testMode = True for test in conf.tests: # Check if there were any premature detection cancellation request # from the user (Ctrl+C) if not kb.testMode: break try: title = test.title stype = test.stype clause = test.clause # Skip test if the user's wants to test only for a specific # technique if conf.technique and isinstance(conf.technique, int) and stype != conf.technique: debugMsg = "skipping test '%s' because the user " % title debugMsg += "specified to test only for " debugMsg += "%s" % PAYLOAD.SQLINJECTION[conf.technique] logger.debug(debugMsg) continue # Skip test if the risk is higher than the provided (or default) # value # Parse test's if test.risk > conf.risk: debugMsg = "skipping test '%s' because the risk " % title debugMsg += "is higher than the provided" logger.debug(debugMsg) continue # Skip test if the level is higher than the provided (or default) # value # Parse test's if test.level > conf.level: debugMsg = "skipping test '%s' because the level " % title debugMsg += "is higher than the provided" logger.debug(debugMsg) continue # Skip DBMS-specific test if it does not match either the # previously identified or the user's provided DBMS if "details" in test and "dbms" in test.details: dbms = test.details.dbms else: dbms = None if dbms is not None: if injection.dbms is not None and injection.dbms != dbms: debugMsg = "skipping test '%s' because " % title debugMsg += "the back-end DBMS identified is " debugMsg += "%s" % injection.dbms logger.debug(debugMsg) continue if conf.dbms is not None and conf.dbms.lower() != dbms.lower(): debugMsg = "skipping test '%s' because " % title debugMsg += "the provided DBMS is %s" % conf.dbms logger.debug(debugMsg) continue # Skip test if it is the same SQL injection type already # identified by another test if injection.data and stype in injection.data: debugMsg = "skipping test '%s' because " % title debugMsg += "the payload for %s has " % PAYLOAD.SQLINJECTION[stype] debugMsg += "already been identified" logger.debug(debugMsg) continue # Skip test if it does not match the same SQL injection clause # already identified by another test clauseMatch = False for clauseTest in clause: if injection.clause is not None and clauseTest in injection.clause: clauseMatch = True break if clause != [ 0 ] and injection.clause and injection.clause != [ 0 ] and not clauseMatch: debugMsg = "skipping test '%s' because the clauses " % title debugMsg += "differs from the clause already identified" logger.debug(debugMsg) continue infoMsg = "testing '%s'" % title logger.info(infoMsg) # Parse test's comment = agent.getComment(test.request) fstPayload = agent.cleanupPayload(test.request.payload, value) fstPayload = unescapeDbms(fstPayload, injection, dbms) fstPayload = "%s%s" % (fstPayload, comment) if stype != 4 and clause != [2, 3] and clause != [ 3 ]: space = " " else: space = "" if conf.prefix is not None and conf.suffix is not None: # Create a custom boundary object for user's supplied prefix # and suffix boundary = advancedDict() boundary.level = 1 boundary.clause = [ 0 ] boundary.where = [ 1, 2, 3 ] boundary.prefix = conf.prefix boundary.suffix = conf.suffix if " like" in boundary.suffix.lower(): if "'" in boundary.suffix.lower(): boundary.ptype = 3 elif '"' in boundary.suffix.lower(): boundary.ptype = 5 elif "'" in boundary.suffix: boundary.ptype = 2 elif '"' in boundary.suffix: boundary.ptype = 4 else: boundary.ptype = 1 # Prepend user's provided boundaries to all others boundaries conf.boundaries.insert(0, boundary) for boundary in conf.boundaries: injectable = False # Skip boundary if the level is higher than the provided (or # default) value # Parse boundary's if boundary.level > conf.level: # NOTE: shall we report every single skipped boundary too? continue # Skip boundary if it does not match against test's # Parse test's and boundary's clauseMatch = False for clauseTest in test.clause: if clauseTest in boundary.clause: clauseMatch = True break if test.clause != [ 0 ] and boundary.clause != [ 0 ] and not clauseMatch: continue # Skip boundary if it does not match against test's # Parse test's and boundary's whereMatch = False for where in test.where: if where in boundary.where: whereMatch = True break if not whereMatch: continue # Parse boundary's , and prefix = boundary.prefix if boundary.prefix else "" suffix = boundary.suffix if boundary.suffix else "" ptype = boundary.ptype # If the previous injections succeeded, we know which prefix, # suffix and parameter type to use for further tests, no # need to cycle through the boundaries for the following tests condBound = (injection.prefix is not None and injection.suffix is not None) condBound &= (injection.prefix != prefix or injection.suffix != suffix) condType = injection.ptype is not None and injection.ptype != ptype if condBound or condType: continue # For each test's for where in test.where: templatePayload = None # Threat the parameter original value according to the # test's tag if where == 1: origValue = value elif where == 2: origValue = "-%s" % randomInt() # Use different page template than the original one # as we are changing parameters value, which will result # most definitely with a different content templatePayload = agent.payload(place, parameter, value, origValue) elif where == 3: origValue = "" kb.pageTemplate = getPageTemplate(templatePayload, place) # Forge request payload by prepending with boundary's # prefix and appending the boundary's suffix to the # test's ' ' string boundPayload = "%s%s%s%s %s" % (origValue, prefix, space, fstPayload, suffix) boundPayload = boundPayload.strip() boundPayload = agent.cleanupPayload(boundPayload, value) reqPayload = agent.payload(place, parameter, value, boundPayload) # Perform the test's request and check whether or not the # payload was successful # Parse test's for method, check in test.response.items(): check = agent.cleanupPayload(check, value) # In case of boolean-based blind SQL injection if method == PAYLOAD.METHOD.COMPARISON: sndPayload = agent.cleanupPayload(test.response.comparison, value) sndPayload = unescapeDbms(sndPayload, injection, dbms) sndPayload = "%s%s" % (sndPayload, comment) # Forge response payload by prepending with # boundary's prefix and appending the boundary's # suffix to the test's ' ' # string boundPayload = "%s%s%s%s %s" % (origValue, prefix, space, sndPayload, suffix) boundPayload = boundPayload.strip() boundPayload = agent.cleanupPayload(boundPayload, value) cmpPayload = agent.payload(place, parameter, value, boundPayload) # Useful to set kb.matchRatio at first based on # the False response content kb.matchRatio = None _ = Request.queryPage(cmpPayload, place) # Perform the test's True request trueResult = Request.queryPage(reqPayload, place) if trueResult: falseResult = Request.queryPage(cmpPayload, place) # Perform the test's False request if not falseResult: infoMsg = "%s parameter '%s' is '%s' injectable " % (place, parameter, title) logger.info(infoMsg) injectable = True # In case of error-based or UNION query SQL injections elif method == PAYLOAD.METHOD.GREP: # Perform the test's request and grep the response # body for the test's regular expression reqBody, _ = Request.queryPage(reqPayload, place, content=True) output = extractRegexResult(check, reqBody, re.DOTALL | re.IGNORECASE) if output: result = output.replace(kb.misc.space, " ") == "1" if result: infoMsg = "%s parameter '%s' is '%s' injectable " % (place, parameter, title) logger.info(infoMsg) injectable = True # In case of time-based blind or stacked queries # SQL injections elif method == PAYLOAD.METHOD.TIME: # Perform the test's request trueResult = Request.queryPage(reqPayload, place, timeBasedCompare=True) if trueResult: # Confirm test's results trueResult = Request.queryPage(reqPayload, place, timeBasedCompare=True) if trueResult: infoMsg = "%s parameter '%s' is '%s' injectable " % (place, parameter, title) logger.info(infoMsg) injectable = True # If the injection test was successful feed the injection # object with the test's details if injectable is True: # Feed with the boundaries details only the first time a # test has been successful if injection.place is None or injection.parameter is None: if place == PLACE.UA: injection.parameter = conf.agent else: injection.parameter = parameter injection.place = place injection.ptype = ptype injection.prefix = prefix injection.suffix = suffix injection.clause = clause if "vector" in test and test.vector is not None: vector = "%s%s" % (test.vector, comment) else: vector = None # Feed with test details every time a test is successful injection.data[stype] = advancedDict() injection.data[stype].title = title injection.data[stype].payload = agent.removePayloadDelimiters(reqPayload, False) injection.data[stype].where = where injection.data[stype].vector = vector injection.data[stype].comment = comment injection.data[stype].matchRatio = kb.matchRatio injection.data[stype].templatePayload = templatePayload if hasattr(test, "details"): for detailKey, detailValue in test.details.items(): if detailKey == "dbms" and injection.dbms is None: injection.dbms = detailValue kb.dbms = detailValue elif detailKey == "dbms_version" and injection.dbms_version is None: injection.dbms_version = detailValue kb.dbmsVersion = [ detailValue ] elif detailKey == "os" and injection.os is None: injection.os = detailValue if conf.beep or conf.scriptKiddie: beep() # There is no need to perform this test for other # tags break if injectable is True: # There is no need to perform this test with others # boundaries break except KeyboardInterrupt: warnMsg = "Ctrl+C detected in detection phase" logger.warn(warnMsg) message = "How do you want to proceed? [(S)kip test/(e)nd detection phase/(n)ext parameter/(q)uit]" test = readInput(message, default="S") if not test or test[0] in ("s", "S"): pass elif test[0] in ("n", "N"): break elif test[0] in ("e", "E"): kb.testMode = False break elif test[0] in ("q", "Q"): raise sqlmapUserQuitException # Flush the flag kb.testMode = False # Return the injection object if injection.place is not None and injection.parameter is not None: return injection else: return None def heuristicCheckSqlInjection(place, parameter, value): if kb.nullConnection: debugMsg = "heuristic checking skipped " debugMsg += "because NULL connection used" logger.debug(debugMsg) return prefix = "" suffix = "" if conf.prefix or conf.suffix: if conf.prefix: prefix = conf.prefix if conf.suffix: suffix = conf.suffix payload = "%s%s%s%s" % (value, prefix, randomStr(length=10, alphabet=['"', '\'', ')', '(']), suffix) payload = agent.payload(place, parameter, value, payload) Request.queryPage(payload, place, raise404=False) result = wasLastRequestDBMSError() infoMsg = "heuristic test shows that %s " % place infoMsg += "parameter '%s' might " % parameter if result: infoMsg += "be injectable (possible DBMS: %s)" % (kb.htmlFp[-1] if kb.htmlFp else 'Unknown') logger.info(infoMsg) else: infoMsg += "not be injectable" logger.warn(infoMsg) return result def checkDynParam(place, parameter, value): """ This function checks if the url parameter is dynamic. If it is dynamic, the content of the page differs, otherwise the dynamicity might depend on another parameter. """ kb.matchRatio = None infoMsg = "testing if %s parameter '%s' is dynamic" % (place, parameter) logger.info(infoMsg) randInt = randomInt() payload = agent.payload(place, parameter, value, getUnicode(randInt)) dynResult = Request.queryPage(payload, place) if True == dynResult: return False infoMsg = "confirming that %s parameter '%s' is dynamic" % (place, parameter) logger.info(infoMsg) randInt = randomInt() payload = agent.payload(place, parameter, value, getUnicode(randInt)) dynResult = Request.queryPage(payload, place) return not dynResult def checkDynamicContent(firstPage, secondPage): """ This function checks if the provided pages have dynamic content. If they are dynamic, proper markings will be made. """ if kb.nullConnection: debugMsg = "dynamic content checking skipped " debugMsg += "because NULL connection used" logger.debug(debugMsg) return if conf.longestCommon: debugMsg = "dynamic content checking skipped " debugMsg += "because longest common comparison used" logger.debug(debugMsg) return infoMsg = "searching for dynamic content" logger.info(infoMsg) blocks = SequenceMatcher(None, firstPage, secondPage).get_matching_blocks() kb.dynamicMarkings = [] # Removing too small matching blocks i = 0 while i < len(blocks): block = blocks[i] (_, _, length) = block if length <= conf.dynMarkLength: blocks.remove(block) else: i += 1 # Making of dynamic markings based on prefix/suffix principle if len(blocks) > 0: blocks.insert(0, None) blocks.append(None) for i in xrange(len(blocks) - 1): prefix = firstPage[blocks[i][0]:blocks[i][0] + blocks[i][2]] if blocks[i] else None suffix = firstPage[blocks[i + 1][0]:blocks[i + 1][0] + blocks[i + 1][2]] if blocks[i + 1] else None if prefix is None and blocks[i + 1][0] == 0: continue if suffix is None and (blocks[i][0] + blocks[i][2] >= len(firstPage)): continue prefix = trimAlphaNum(prefix) suffix = trimAlphaNum(suffix) kb.dynamicMarkings.append((re.escape(prefix[-conf.dynMarkLength/2:]) if prefix else None, re.escape(suffix[:conf.dynMarkLength/2]) if suffix else None)) if len(kb.dynamicMarkings) > 0: infoMsg = "dynamic content marked for removal (%d region%s)" % (len(kb.dynamicMarkings), 's' if len(kb.dynamicMarkings) > 1 else '') logger.info(infoMsg) def checkStability(): """ This function checks if the URL content is stable requesting the same page two times with a small delay within each request to assume that it is stable. In case the content of the page differs when requesting the same page, the dynamicity might depend on other parameters, like for instance string matching (--string). """ infoMsg = "testing if the url is stable, wait a few seconds" logger.info(infoMsg) firstPage = kb.originalPage # set inside checkConnection() time.sleep(1) secondPage, _ = Request.queryPage(content=True) kb.pageStable = (firstPage == secondPage) if kb.pageStable: if firstPage: logMsg = "url is stable" logger.info(logMsg) else: errMsg = "there was an error checking the stability of page " errMsg += "because of lack of content. please check the " errMsg += "page request results (and probable errors) by " errMsg += "using higher verbosity levels" raise sqlmapNoneDataException, errMsg else: warnMsg = "url is not stable, sqlmap will base the page " warnMsg += "comparison on a sequence matcher. If no dynamic nor " warnMsg += "injectable parameters are detected, or in case of " warnMsg += "junk results, refer to user's manual paragraph " warnMsg += "'Page comparison' and provide a string or regular " warnMsg += "expression to match on" logger.warn(warnMsg) message = "how do you want to proceed? [C(ontinue)/s(tring)/r(egex)/q(uit)] " if not conf.scriptKiddie: test = readInput(message, default="C") else: test = None if test and test[0] in ("q", "Q"): raise sqlmapUserQuitException elif test and test[0] in ("s", "S"): showStaticWords(firstPage, secondPage) message = "please enter value for parameter 'string': " test = readInput(message) if test: conf.string = test if kb.nullConnection: debugMsg = "turning off NULL connection " debugMsg += "support because of string checking" logger.debug(debugMsg) kb.nullConnection = None else: errMsg = "Empty value supplied" raise sqlmapNoneDataException, errMsg elif test and test[0] in ("r", "R"): message = "please enter value for parameter 'regex': " test = readInput(message) if test: conf.regex = test if kb.nullConnection: debugMsg = "turning off NULL connection " debugMsg += "support because of regex checking" logger.debug(debugMsg) kb.nullConnection = None else: errMsg = "Empty value supplied" raise sqlmapNoneDataException, errMsg else: checkDynamicContent(firstPage, secondPage) count = 0 while not Request.queryPage(): count += 1 if count > conf.retries: errMsg = "target url is too dynamic. unable to continue. " errMsg += "consider using other switches (e.g. " errMsg += "--longest-common, --string, --text-only, etc.)" raise sqlmapSiteTooDynamic, errMsg warnMsg = "target url is heavily dynamic" warnMsg += ", sqlmap is going to retry the request" logger.critical(warnMsg) secondPage, _ = Request.queryPage(content=True) checkDynamicContent(firstPage, secondPage) return kb.pageStable def checkString(): if not conf.string: return True condition = ( kb.resumedQueries.has_key(conf.url) and kb.resumedQueries[conf.url].has_key("String") and kb.resumedQueries[conf.url]["String"][:-1] == conf.string ) if condition: return True infoMsg = "testing if the provided string is within the " infoMsg += "target URL page content" logger.info(infoMsg) page, _ = Request.queryPage(content=True) if conf.string in page: setString() else: warnMsg = "you provided '%s' as the string to " % conf.string warnMsg += "match, but such a string is not within the target " warnMsg += "URL page content original request, sqlmap will " warnMsg += "keep going anyway" logger.warn(warnMsg) return True def checkRegexp(): if not conf.regexp: return True condition = ( kb.resumedQueries.has_key(conf.url) and kb.resumedQueries[conf.url].has_key("Regular expression") and kb.resumedQueries[conf.url]["Regular expression"][:-1] == conf.regexp ) if condition: return True infoMsg = "testing if the provided regular expression matches within " infoMsg += "the target URL page content" logger.info(infoMsg) page, _ = Request.queryPage(content=True) if re.search(conf.regexp, page, re.I | re.M): setRegexp() else: warnMsg = "you provided '%s' as the regular expression to " % conf.regexp warnMsg += "match, but such a regular expression does not have any " warnMsg += "match within the target URL page content, sqlmap " warnMsg += "will keep going anyway" logger.warn(warnMsg) return True def checkNullConnection(): """ Reference: http://www.wisec.it/sectou.php?id=472f952d79293 """ infoMsg = "testing NULL connection to the target url" logger.info(infoMsg) try: page, headers = Request.getPage(method=HTTPMETHOD.HEAD) if not page and 'Content-Length' in headers: kb.nullConnection = NULLCONNECTION.HEAD infoMsg = "NULL connection is supported with HEAD header" logger.info(infoMsg) else: page, headers = Request.getPage(auxHeaders={"Range": "bytes=-1"}) if page and len(page) == 1 and 'Content-Range' in headers: kb.nullConnection = NULLCONNECTION.RANGE infoMsg = "NULL connection is supported with GET header " infoMsg += "'%s'" % kb.nullConnection logger.info(infoMsg) except sqlmapConnectionException, errMsg: errMsg = getUnicode(errMsg) raise sqlmapConnectionException, errMsg return kb.nullConnection is not None def checkConnection(suppressOutput=False): try: socket.gethostbyname(conf.hostname) except socket.gaierror: errMsg = "host '%s' does not exist" % conf.hostname raise sqlmapConnectionException, errMsg if not suppressOutput: infoMsg = "testing connection to the target url" logger.info(infoMsg) try: page, _ = Request.queryPage(content=True) kb.originalPage = kb.pageTemplate = page except sqlmapConnectionException, errMsg: errMsg = getUnicode(errMsg) raise sqlmapConnectionException, errMsg return True