#!/usr/bin/env python """ $Id$ This file is part of the sqlmap project, http://sqlmap.sourceforge.net. Copyright (c) 2006-2008 Bernardo Damele A. G. and Daniele Bellucci sqlmap is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation version 2 of the License. sqlmap is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with sqlmap; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA """ import re from lib.core.common import formatDBMSfp from lib.core.common import formatFingerprint from lib.core.common import getHtmlErrorFp from lib.core.common import randomInt from lib.core.data import conf from lib.core.data import kb from lib.core.data import logger from lib.core.exception import sqlmapSyntaxException from lib.core.session import setDbms from lib.core.settings import PGSQL_ALIASES from lib.core.settings import PGSQL_SYSTEM_DBS from lib.core.unescaper import unescaper from lib.request import inject from plugins.generic.enumeration import Enumeration from plugins.generic.filesystem import Filesystem from plugins.generic.fingerprint import Fingerprint from plugins.generic.takeover import Takeover class PostgreSQLMap(Fingerprint, Enumeration, Filesystem, Takeover): """ This class defines PostgreSQL methods """ def __init__(self): self.excludeDbsList = PGSQL_SYSTEM_DBS Enumeration.__init__(self, "PostgreSQL") unescaper.setUnescape(PostgreSQLMap.unescape) @staticmethod def unescape(expression, quote=True): if quote: while True: index = expression.find("'") if index == -1: break firstIndex = index + 1 index = expression[firstIndex:].find("'") if index == -1: raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression lastIndex = firstIndex + index old = "'%s'" % expression[firstIndex:lastIndex] #unescaped = "(" unescaped = "" for i in range(firstIndex, lastIndex): unescaped += "CHR(%d)" % (ord(expression[i])) if i < lastIndex - 1: unescaped += "||" #unescaped += ")" expression = expression.replace(old, unescaped) else: expression = "||".join("CHR(%d)" % ord(c) for c in expression) return expression @staticmethod def escape(expression): while True: index = expression.find("CHR(") if index == -1: break firstIndex = index index = expression[firstIndex:].find("))") if index == -1: raise sqlmapSyntaxException, "Unenclosed ) in '%s'" % expression lastIndex = firstIndex + index + 1 old = expression[firstIndex:lastIndex] oldUpper = old.upper() oldUpper = oldUpper.replace("CHR(", "").replace(")", "") oldUpper = oldUpper.split("||") escaped = "'%s'" % "".join([chr(int(char)) for char in oldUpper]) expression = expression.replace(old, escaped) return expression def getFingerprint(self): value = "" wsOsFp = formatFingerprint("web server", kb.headersFp) if wsOsFp: value += "%s\n" % wsOsFp if self.banner: dbmsOsFp = formatFingerprint("back-end DBMS", kb.bannerFp) if dbmsOsFp: value += "%s\n" % dbmsOsFp value += "back-end DBMS: " if not conf.extensiveFp: value += "PostgreSQL" return value actVer = formatDBMSfp() blank = " " * 15 value += "active fingerprint: %s" % actVer if kb.bannerFp: banVer = kb.bannerFp["dbmsVersion"] banVer = formatDBMSfp([banVer]) value += "\n%sbanner parsing fingerprint: %s" % (blank, banVer) htmlErrorFp = getHtmlErrorFp() if htmlErrorFp: value += "\n%shtml error message fingerprint: %s" % (blank, htmlErrorFp) return value def checkDbms(self): """ Reference for fingerprint: http://www.postgresql.org/docs/8.3/interactive/release-8-3.html """ if conf.dbms in PGSQL_ALIASES: setDbms("PostgreSQL") self.getPrematureBanner("VERSION()") if not conf.extensiveFp: return True logMsg = "testing PostgreSQL" logger.info(logMsg) randInt = str(randomInt(1)) query = "COALESCE(%s, NULL)" % randInt if inject.getValue(query) == randInt: logMsg = "confirming PostgreSQL" logger.info(logMsg) query = "LENGTH('%s')" % randInt if not inject.getValue(query) == "1": warnMsg = "the back-end DMBS is not PostgreSQL" logger.warn(warnMsg) return False setDbms("PostgreSQL") self.getPrematureBanner("VERSION()") if not conf.extensiveFp: return True transTimeCasted = inject.getValue("SUBSTR(TRANSACTION_TIMESTAMP()::text, 1, 1)") in ( "1", "2" ) transTime = inject.getValue("SUBSTR(TRANSACTION_TIMESTAMP(), 1, 1)") in ( "1", "2" ) if transTimeCasted and not transTime: kb.dbmsVersion = [">= 8.3.0"] elif transTime: kb.dbmsVersion = [">= 8.2.0", "< 8.3.0"] elif inject.getValue("GREATEST(5, 9, 1)") == "9": kb.dbmsVersion = [">= 8.1.0", "< 8.2.0"] elif inject.getValue("WIDTH_BUCKET(5.35, 0.024, 10.06, 5)") == "3": kb.dbmsVersion = [">= 8.0.0", "< 8.1.0"] elif inject.getValue("SUBSTR(MD5('sqlmap'), 1, 1)"): kb.dbmsVersion = [">= 7.4.0", "< 8.0.0"] elif inject.getValue("SUBSTR(CURRENT_SCHEMA(), 1, 1)") == "p": kb.dbmsVersion = [">= 7.3.0", "< 7.4.0"] elif inject.getValue("BIT_LENGTH(1)") == "8": kb.dbmsVersion = [">= 7.2.0", "< 7.3.0"] elif inject.getValue("SUBSTR(QUOTE_LITERAL('a'), 2, 1)") == "a": kb.dbmsVersion = [">= 7.1.0", "< 7.2.0"] elif inject.getValue("POW(2, 3)") == "8": kb.dbmsVersion = [">= 7.0.0", "< 7.1.0"] elif inject.getValue("MAX('a')") == "a": kb.dbmsVersion = [">= 6.5.0", "< 6.5.3"] elif re.search("([\d\.]+)", inject.getValue("SUBSTR(VERSION(), 12, 5)")): kb.dbmsVersion = [">= 6.4.0", "< 6.5.0"] elif inject.getValue("SUBSTR(CURRENT_DATE, 1, 1)") == "2": kb.dbmsVersion = [">= 6.3.0", "< 6.4.0"] elif inject.getValue("SUBSTRING('sqlmap', 1, 1)") == "s": kb.dbmsVersion = [">= 6.2.0", "< 6.3.0"] else: kb.dbmsVersion = ["< 6.2.0"] return True else: warnMsg = "the back-end DMBS is not PostgreSQL" logger.warn(warnMsg) return False def forceDbmsEnum(self): if conf.db not in PGSQL_SYSTEM_DBS and conf.db != "public": conf.db = "public" warnMsg = "on PostgreSQL it is only possible to enumerate " warnMsg += "on the current schema and on system databases, " warnMsg += "sqlmap is going to use 'public' schema as " warnMsg += "database name" logger.warn(warnMsg)