mirror of
https://github.com/sqlmapproject/sqlmap.git
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4dec049c22
Minor bug fix to skip following tests if they do not match any of the clause previously identified (injection.clause value).
744 lines
28 KiB
Python
744 lines
28 KiB
Python
#!/usr/bin/env python
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"""
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$Id$
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Copyright (c) 2006-2010 sqlmap developers (http://sqlmap.sourceforge.net/)
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See the file 'doc/COPYING' for copying permission
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"""
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import re
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import socket
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import time
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from difflib import SequenceMatcher
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from lib.core.agent import agent
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from lib.core.common import beep
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from lib.core.common import calculateDeltaSeconds
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from lib.core.common import getUnicode
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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.common import showStaticWords
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from lib.core.common import trimAlphaNum
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from lib.core.common import wasLastRequestDBMSError
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from lib.core.common import DynamicContentItem
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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.datatype import advancedDict
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from lib.core.datatype import injectionDict
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from lib.core.enums import HTTPMETHOD
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from lib.core.enums import NULLCONNECTION
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from lib.core.enums import PAYLOAD
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from lib.core.enums import PLACE
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from lib.core.exception import sqlmapConnectionException
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from lib.core.exception import sqlmapGenericException
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from lib.core.exception import sqlmapNoneDataException
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from lib.core.exception import sqlmapSiteTooDynamic
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from lib.core.exception import sqlmapUserQuitException
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from lib.core.session import setString
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from lib.core.session import setRegexp
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from lib.core.settings import ERROR_SPACE
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from lib.core.settings import ERROR_EMPTY_CHAR
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from lib.request.connect import Connect as Request
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from plugins.dbms.firebird.syntax import Syntax as Firebird
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from plugins.dbms.postgresql.syntax import Syntax as PostgreSQL
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from plugins.dbms.mssqlserver.syntax import Syntax as MSSQLServer
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from plugins.dbms.oracle.syntax import Syntax as Oracle
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from plugins.dbms.mysql.syntax import Syntax as MySQL
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from plugins.dbms.access.syntax import Syntax as Access
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from plugins.dbms.sybase.syntax import Syntax as Sybase
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from plugins.dbms.sqlite.syntax import Syntax as SQLite
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from plugins.dbms.maxdb.syntax import Syntax as MaxDB
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def unescape(string, dbms):
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unescaper = {
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"Access": Access.unescape,
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"Firebird": Firebird.unescape,
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"MaxDB": MaxDB.unescape,
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"Microsoft SQL Server": MSSQLServer.unescape,
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"MySQL": MySQL.unescape,
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"Oracle": Oracle.unescape,
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"PostgreSQL": PostgreSQL.unescape,
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"SQLite": SQLite.unescape,
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"Sybase": Sybase.unescape
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}
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if dbms in unescaper:
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return unescaper[dbms](string)
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else:
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return string
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def unescapeDbms(payload, injection, dbms):
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# If this is a DBMS-specific test (dbms), sqlmap identified the
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# DBMS during previous a test (injection.dbms) or the user
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# provided a DBMS (conf.dbms), unescape the strings between single
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# quotes in the payload
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if injection.dbms is not None:
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payload = unescape(payload, injection.dbms)
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elif dbms is not None:
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payload = unescape(payload, dbms)
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elif conf.dbms is not None:
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payload = unescape(payload, conf.dbms)
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return payload
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def checkSqlInjection(place, parameter, value):
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# Store here the details about boundaries and payload used to
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# successfully inject
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injection = injectionDict()
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for test in conf.tests:
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title = test.title
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stype = test.stype
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clause = test.clause
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# Skip test if the risk is higher than the provided (or default)
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# value
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# Parse test's <risk>
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if test.risk > conf.risk:
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debugMsg = "skipping test '%s' because the risk " % title
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debugMsg += "is higher than the provided"
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logger.debug(debugMsg)
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continue
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# Skip test if the level is higher than the provided (or default)
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# value
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# Parse test's <level>
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if test.level > conf.level:
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debugMsg = "skipping test '%s' because the level " % title
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debugMsg += "is higher than the provided"
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logger.debug(debugMsg)
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continue
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# Skip DBMS-specific test if it does not match either the
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# previously identified or the user's provided DBMS
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if "details" in test and "dbms" in test.details:
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dbms = test.details.dbms
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else:
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dbms = None
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if dbms is not None:
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if injection.dbms is not None and injection.dbms != dbms:
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debugMsg = "skipping test '%s' because " % title
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debugMsg += "the back-end DBMS identified is "
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debugMsg += "%s" % injection.dbms
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logger.debug(debugMsg)
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continue
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if conf.dbms is not None and conf.dbms.lower() != dbms.lower():
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debugMsg = "skipping test '%s' because " % title
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debugMsg += "the provided DBMS is %s" % conf.dbms
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logger.debug(debugMsg)
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continue
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# Skip test if it is the same SQL injection type already
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# identified by another test
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if injection.data and stype in injection.data:
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debugMsg = "skipping test '%s' because " % title
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debugMsg += "the payload for %s has " % PAYLOAD.SQLINJECTION[stype]
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debugMsg += "already been identified"
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logger.debug(debugMsg)
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continue
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# Skip test if it does not match the same SQL injection clause
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# already identified by another test
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# Parse test's <clause>
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clauseMatch = False
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for clauseTest in clause:
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if injection.clause is not None and clauseTest in injection.clause:
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clauseMatch = True
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break
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if clause != [ 0 ] and injection.clause and not clauseMatch:
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debugMsg = "skipping test '%s' because the clause " % title
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debugMsg += "differs from the clause already identified"
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logger.debug(debugMsg)
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continue
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infoMsg = "testing '%s'" % title
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logger.info(infoMsg)
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# Parse test's <request>
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comment = agent.getComment(test.request)
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fstPayload = agent.cleanupPayload(test.request.payload, value)
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fstPayload = unescapeDbms(fstPayload, injection, dbms)
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fstPayload = "%s%s" % (fstPayload, comment)
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if conf.prefix is not None and conf.suffix is not None:
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# Create a custom boundary object for user's supplied prefix
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# and suffix
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boundary = advancedDict()
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boundary.level = 1
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boundary.clause = [ 0 ]
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boundary.where = [ 1, 2, 3 ]
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boundary.prefix = conf.prefix
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boundary.suffix = conf.suffix
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if " like" in boundary.suffix.lower():
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if "'" in boundary.suffix.lower():
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boundary.ptype = 3
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elif '"' in boundary.suffix.lower():
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boundary.ptype = 5
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elif "'" in boundary.suffix.lower():
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boundary.ptype = 2
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elif '"' in boundary.suffix.lower():
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boundary.ptype = 4
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else:
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boundary.ptype = 1
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# Prepend user's provided boundaries to all others boundaries
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conf.boundaries.insert(0, boundary)
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for boundary in conf.boundaries:
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injectable = False
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# Skip boundary if the level is higher than the provided (or
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# default) value
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# Parse boundary's <level>
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if boundary.level > conf.level:
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# NOTE: shall we report every single skipped boundary too?
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continue
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# Skip boundary if it does not match against test's <clause>
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# Parse test's <clause> and boundary's <clause>
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clauseMatch = False
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for clauseTest in test.clause:
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if clauseTest in boundary.clause:
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clauseMatch = True
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break
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if test.clause != [ 0 ] and boundary.clause != [ 0 ] and not clauseMatch:
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continue
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# Skip boundary if it does not match against test's <where>
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# Parse test's <where> and boundary's <where>
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whereMatch = False
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for where in test.where:
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if where in boundary.where:
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whereMatch = True
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break
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if not whereMatch:
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continue
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# Parse boundary's <prefix>, <suffix> and <ptype>
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prefix = boundary.prefix if boundary.prefix else ""
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suffix = boundary.suffix if boundary.suffix else ""
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ptype = boundary.ptype
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# If the previous injections succeeded, we know which prefix,
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# suffix and parameter type to use for further tests, no
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# need to cycle through the boundaries for the following tests
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condBound = (injection.prefix is not None and injection.suffix is not None)
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condBound &= (injection.prefix != prefix or injection.suffix != suffix)
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condType = injection.ptype is not None and injection.ptype != ptype
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if condBound or condType:
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continue
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# For each test's <where>
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for where in test.where:
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# Threat the parameter original value according to the
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# test's <where> tag
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if where == 1:
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origValue = value
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elif where == 2:
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origValue = "-%s" % value
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elif where == 3:
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origValue = ""
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# Forge request payload by prepending with boundary's
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# prefix and appending the boundary's suffix to the
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# test's ' <payload><comment> ' string
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boundPayload = "%s%s%s%s %s" % (origValue, prefix, (" " if stype != 4 else ""), fstPayload, suffix)
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boundPayload = boundPayload.strip()
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boundPayload = agent.cleanupPayload(boundPayload, value)
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reqPayload = agent.payload(place, parameter, value, boundPayload)
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# Perform the test's request and check whether or not the
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# payload was successful
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# Parse test's <response>
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for method, check in test.response.items():
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check = agent.cleanupPayload(check, value)
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# In case of boolean-based blind SQL injection
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if method == "comparison":
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sndPayload = agent.cleanupPayload(test.response.comparison, value)
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sndPayload = unescapeDbms(sndPayload, injection, dbms)
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sndPayload = "%s%s" % (sndPayload, comment)
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# Forge response payload by prepending with
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# boundary's prefix and appending the boundary's
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# suffix to the test's ' <payload><comment> '
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# string
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boundPayload = "%s%s%s%s %s" % (origValue, prefix, (" " if stype != 4 else ""), sndPayload, suffix)
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boundPayload = boundPayload.strip()
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boundPayload = agent.cleanupPayload(boundPayload, value)
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cmpPayload = agent.payload(place, parameter, value, boundPayload)
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# Useful to set conf.matchRatio at first based on
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# the False response content
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conf.matchRatio = None
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_ = Request.queryPage(cmpPayload, place)
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# Compare True and False response contents
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trueResult = Request.queryPage(reqPayload, place)
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if trueResult:
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falseResult = Request.queryPage(cmpPayload, place)
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if not falseResult:
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infoMsg = "%s parameter '%s' is '%s' injectable " % (place, parameter, title)
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logger.info(infoMsg)
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kb.paramMatchRatio[(place, parameter)] = conf.matchRatio
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injectable = True
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kb.paramMatchRatio[(place, parameter)] = conf.matchRatio
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# In case of error-based or UNION query SQL injections
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elif method == "grep":
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# Perform the test's request and grep the response
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# body for the test's <grep> regular expression
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reqBody, _ = Request.queryPage(reqPayload, place, content=True)
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match = re.search(check, reqBody, re.DOTALL | re.IGNORECASE)
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if not match:
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continue
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output = match.group('result')
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if output:
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output = output.replace(ERROR_SPACE, " ").replace(ERROR_EMPTY_CHAR, "")
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if output == "1":
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infoMsg = "%s parameter '%s' is '%s' injectable " % (place, parameter, title)
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logger.info(infoMsg)
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injectable = True
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# In case of time-based blind or stacked queries
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# SQL injections
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elif method == "time":
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# Perform the test's request and check how long
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# it takes to get the response back
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start = time.time()
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_ = Request.queryPage(reqPayload, place)
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duration = calculateDeltaSeconds(start)
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if duration >= conf.timeSec:
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infoMsg = "%s parameter '%s' is '%s' injectable " % (place, parameter, title)
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logger.info(infoMsg)
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injectable = True
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# If the injection test was successful feed the injection
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# object with the test's details
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if injectable is True:
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# Feed with the boundaries details only the first time a
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# test has been successful
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if injection.place is None or injection.parameter is None:
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if place == PLACE.UA:
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injection.parameter = conf.agent
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else:
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injection.parameter = parameter
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injection.place = place
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injection.ptype = ptype
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injection.prefix = prefix
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injection.suffix = suffix
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injection.clause = clause
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if "epayload" in test:
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epayload = "%s%s" % (test.epayload, comment)
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else:
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epayload = None
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# Feed with test details every time a test is successful
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injection.data[stype] = advancedDict()
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injection.data[stype].title = title
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injection.data[stype].payload = agent.removePayloadDelimiters(reqPayload, False)
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injection.data[stype].where = where
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injection.data[stype].epayload = epayload
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injection.data[stype].comment = comment
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if "details" in test:
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for detailKey, detailValue in test.details.items():
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if detailKey == "dbms" and injection.dbms is None:
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injection.dbms = detailValue
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kb.dbms = detailValue
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elif detailKey == "dbms_version" and injection.dbms_version is None:
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injection.dbms_version = detailValue
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kb.dbmsVersion = [ detailValue ]
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elif detailKey == "os" and injection.os is None:
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injection.os = detailValue
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if conf.beep:
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beep()
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# There is no need to perform this test for other
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# <where> tags
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break
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if injectable is True:
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# There is no need to perform this test with others
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# boundaries
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break
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# Return the injection object
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if injection.place is not None and injection.parameter is not None:
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return injection
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else:
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return None
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def heuristicCheckSqlInjection(place, parameter, value):
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if kb.nullConnection:
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debugMsg = "heuristic checking skipped "
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debugMsg += "because NULL connection used"
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logger.debug(debugMsg)
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return
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prefix = ""
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suffix = ""
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if conf.prefix or conf.suffix:
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if conf.prefix:
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prefix = conf.prefix
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if conf.suffix:
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suffix = conf.suffix
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payload = "%s%s%s%s" % (value, prefix, randomStr(length=10, alphabet=['"', '\'', ')', '(']), suffix)
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payload = agent.payload(place, parameter, value, payload)
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Request.queryPage(payload, place, raise404=False)
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result = wasLastRequestDBMSError()
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infoMsg = "heuristics shows that %s " % place
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infoMsg += "parameter '%s' might " % parameter
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if result:
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infoMsg += "be injectable (possible DBMS: %s)" % (kb.htmlFp[-1] if kb.htmlFp else 'Unknown')
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logger.info(infoMsg)
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else:
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infoMsg += "not be injectable"
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logger.warning(infoMsg)
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def checkDynParam(place, parameter, value):
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"""
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This function checks if the url parameter is dynamic. If it is
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dynamic, the content of the page differs, otherwise the
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dynamicity might depend on another parameter.
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"""
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conf.matchRatio = None
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infoMsg = "testing if %s parameter '%s' is dynamic" % (place, parameter)
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logger.info(infoMsg)
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randInt = randomInt()
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payload = agent.payload(place, parameter, value, getUnicode(randInt))
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dynResult = Request.queryPage(payload, place)
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if True == dynResult:
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return False
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infoMsg = "confirming that %s parameter '%s' is dynamic" % (place, parameter)
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logger.info(infoMsg)
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randInt = randomInt()
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payload = agent.payload(place, parameter, value, getUnicode(randInt))
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dynResult = Request.queryPage(payload, place)
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return not dynResult
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def checkDynamicContent(firstPage, secondPage):
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"""
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This function checks if the provided pages have dynamic content. If they
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are dynamic, proper markings will be made.
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"""
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if kb.nullConnection:
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debugMsg = "dynamic content checking skipped "
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debugMsg += "because NULL connection used"
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logger.debug(debugMsg)
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return
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if conf.longestCommon:
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debugMsg = "dynamic content checking skipped "
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debugMsg += "because longest common comparison used"
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logger.debug(debugMsg)
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return
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infoMsg = "searching for dynamic content"
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logger.info(infoMsg)
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blocks = SequenceMatcher(None, firstPage, secondPage).get_matching_blocks()
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kb.dynamicMarkings = []
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i = 0
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while i < len(blocks):
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block = blocks[i]
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(_, _, length) = block
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if length <= conf.minMatchBlock:
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blocks.remove(block)
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else:
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i += 1
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if len(blocks) > 0:
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blocks.insert(0, None)
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blocks.append(None)
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for i in xrange(len(blocks) - 1):
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prefix = firstPage[blocks[i][0]:blocks[i][0] + blocks[i][2]] if blocks[i] else None
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suffix = firstPage[blocks[i + 1][0]:blocks[i + 1][0] + blocks[i + 1][2]] if blocks[i + 1] else None
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if prefix is None and blocks[i + 1][0] == 0:
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continue
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if suffix is None and (blocks[i][0] + blocks[i][2] >= len(firstPage)):
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continue
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prefix = trimAlphaNum(prefix)
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suffix = trimAlphaNum(suffix)
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kb.dynamicMarkings.append((re.escape(prefix[-conf.dynMarkLength:]) if prefix else None, re.escape(suffix[:conf.dynMarkLength]) if suffix else None))
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if len(kb.dynamicMarkings) > 0:
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infoMsg = "dynamic content marked for removal (%d region%s)" % (len(kb.dynamicMarkings), 's' if len(kb.dynamicMarkings) > 1 else '')
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logger.info(infoMsg)
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if conf.seqMatcher.a:
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for item in kb.dynamicMarkings:
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prefix, suffix = item
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if prefix is None:
|
|
conf.seqMatcher.a = re.sub('(?s)^.+%s' % suffix, suffix, conf.seqMatcher.a)
|
|
elif suffix is None:
|
|
conf.seqMatcher.a = re.sub('(?s)%s.+$' % prefix, prefix, conf.seqMatcher.a)
|
|
else:
|
|
conf.seqMatcher.a = re.sub('(?s)%s.+%s' % (prefix, suffix), '%s%s' % (prefix, suffix), conf.seqMatcher.a)
|
|
|
|
def checkStability():
|
|
"""
|
|
This function checks if the URL content is stable requesting the
|
|
same page two times with a small delay within each request to
|
|
assume that it is stable.
|
|
|
|
In case the content of the page differs when requesting
|
|
the same page, the dynamicity might depend on other parameters,
|
|
like for instance string matching (--string).
|
|
"""
|
|
|
|
infoMsg = "testing if the url is stable, wait a few seconds"
|
|
logger.info(infoMsg)
|
|
|
|
firstPage = conf.seqMatcher.a # set inside checkConnection()
|
|
time.sleep(1)
|
|
secondPage, _ = Request.queryPage(content=True)
|
|
|
|
kb.pageStable = (firstPage == secondPage)
|
|
|
|
if kb.pageStable:
|
|
if firstPage:
|
|
logMsg = "url is stable"
|
|
logger.info(logMsg)
|
|
else:
|
|
errMsg = "there was an error checking the stability of page "
|
|
errMsg += "because of lack of content. please check the "
|
|
errMsg += "page request results (and probable errors) by "
|
|
errMsg += "using higher verbosity levels"
|
|
raise sqlmapNoneDataException, errMsg
|
|
|
|
else:
|
|
warnMsg = "url is not stable, sqlmap will base the page "
|
|
warnMsg += "comparison on a sequence matcher. If no dynamic nor "
|
|
warnMsg += "injectable parameters are detected, or in case of "
|
|
warnMsg += "junk results, refer to user's manual paragraph "
|
|
warnMsg += "'Page comparison' and provide a string or regular "
|
|
warnMsg += "expression to match on"
|
|
logger.warn(warnMsg)
|
|
|
|
message = "how do you want to proceed? [C(ontinue)/s(tring)/r(egex)/q(uit)] "
|
|
test = readInput(message, default="C")
|
|
|
|
if test and test[0] in ("q", "Q"):
|
|
raise sqlmapUserQuitException
|
|
|
|
elif test and test[0] in ("s", "S"):
|
|
showStaticWords(firstPage, secondPage)
|
|
|
|
message = "please enter value for parameter 'string': "
|
|
test = readInput(message)
|
|
|
|
if test:
|
|
conf.string = test
|
|
|
|
if kb.nullConnection:
|
|
debugMsg = "turning off NULL connection "
|
|
debugMsg += "support because of string checking"
|
|
logger.debug(debugMsg)
|
|
|
|
kb.nullConnection = None
|
|
else:
|
|
errMsg = "Empty value supplied"
|
|
raise sqlmapNoneDataException, errMsg
|
|
|
|
elif test and test[0] in ("r", "R"):
|
|
message = "please enter value for parameter 'regex': "
|
|
test = readInput(message)
|
|
|
|
if test:
|
|
conf.regex = test
|
|
|
|
if kb.nullConnection:
|
|
debugMsg = "turning off NULL connection "
|
|
debugMsg += "support because of regex checking"
|
|
logger.debug(debugMsg)
|
|
|
|
kb.nullConnection = None
|
|
else:
|
|
errMsg = "Empty value supplied"
|
|
raise sqlmapNoneDataException, errMsg
|
|
else:
|
|
checkDynamicContent(firstPage, secondPage)
|
|
|
|
count = 0
|
|
while not Request.queryPage():
|
|
count += 1
|
|
|
|
if count > conf.retries:
|
|
errMsg = "target url is too dynamic. unable to continue. "
|
|
errMsg += "consider using other switches (e.g. "
|
|
errMsg += "--longest-common, --string, --text-only, etc.)"
|
|
raise sqlmapSiteTooDynamic, errMsg
|
|
|
|
warnMsg = "target url is heavily dynamic"
|
|
warnMsg += ", sqlmap is going to retry the request"
|
|
logger.critical(warnMsg)
|
|
|
|
secondPage, _ = Request.queryPage(content=True)
|
|
checkDynamicContent(firstPage, secondPage)
|
|
|
|
return kb.pageStable
|
|
|
|
def checkString():
|
|
if not conf.string:
|
|
return True
|
|
|
|
condition = (
|
|
kb.resumedQueries.has_key(conf.url) and
|
|
kb.resumedQueries[conf.url].has_key("String") and
|
|
kb.resumedQueries[conf.url]["String"][:-1] == conf.string
|
|
)
|
|
|
|
if condition:
|
|
return True
|
|
|
|
infoMsg = "testing if the provided string is within the "
|
|
infoMsg += "target URL page content"
|
|
logger.info(infoMsg)
|
|
|
|
page, _ = Request.queryPage(content=True)
|
|
|
|
if conf.string in page:
|
|
setString()
|
|
else:
|
|
warnMsg = "you provided '%s' as the string to " % conf.string
|
|
warnMsg += "match, but such a string is not within the target "
|
|
warnMsg += "URL page content original request, sqlmap will "
|
|
warnMsg += "keep going anyway"
|
|
logger.warn(warnMsg)
|
|
|
|
return True
|
|
|
|
def checkRegexp():
|
|
if not conf.regexp:
|
|
return True
|
|
|
|
condition = (
|
|
kb.resumedQueries.has_key(conf.url) and
|
|
kb.resumedQueries[conf.url].has_key("Regular expression") and
|
|
kb.resumedQueries[conf.url]["Regular expression"][:-1] == conf.regexp
|
|
)
|
|
|
|
if condition:
|
|
return True
|
|
|
|
infoMsg = "testing if the provided regular expression matches within "
|
|
infoMsg += "the target URL page content"
|
|
logger.info(infoMsg)
|
|
|
|
page, _ = Request.queryPage(content=True)
|
|
|
|
if re.search(conf.regexp, page, re.I | re.M):
|
|
setRegexp()
|
|
else:
|
|
warnMsg = "you provided '%s' as the regular expression to " % conf.regexp
|
|
warnMsg += "match, but such a regular expression does not have any "
|
|
warnMsg += "match within the target URL page content, sqlmap "
|
|
warnMsg += "will keep going anyway"
|
|
logger.warn(warnMsg)
|
|
|
|
return True
|
|
|
|
def checkNullConnection():
|
|
"""
|
|
Reference: http://www.wisec.it/sectou.php?id=472f952d79293
|
|
"""
|
|
|
|
infoMsg = "testing NULL connection to the target url"
|
|
logger.info(infoMsg)
|
|
|
|
try:
|
|
page, headers = Request.getPage(method=HTTPMETHOD.HEAD)
|
|
if not page and 'Content-Length' in headers:
|
|
kb.nullConnection = NULLCONNECTION.HEAD
|
|
|
|
infoMsg = "NULL connection is supported with HEAD header"
|
|
logger.info(infoMsg)
|
|
else:
|
|
page, headers = Request.getPage(auxHeaders={"Range": "bytes=-1"})
|
|
if page and len(page) == 1 and 'Content-Range' in headers:
|
|
kb.nullConnection = NULLCONNECTION.RANGE
|
|
|
|
infoMsg = "NULL connection is supported with GET header "
|
|
infoMsg += "'%s'" % kb.nullConnection
|
|
logger.info(infoMsg)
|
|
except sqlmapConnectionException, errMsg:
|
|
errMsg = getUnicode(errMsg)
|
|
raise sqlmapConnectionException, errMsg
|
|
|
|
return kb.nullConnection is not None
|
|
|
|
def checkConnection(suppressOutput=False):
|
|
try:
|
|
socket.gethostbyname(conf.hostname)
|
|
except socket.gaierror:
|
|
errMsg = "host '%s' does not exist" % conf.hostname
|
|
raise sqlmapConnectionException, errMsg
|
|
|
|
if not suppressOutput:
|
|
infoMsg = "testing connection to the target url"
|
|
logger.info(infoMsg)
|
|
|
|
try:
|
|
page, _ = Request.queryPage(content=True)
|
|
conf.seqMatcher.set_seq1(page)
|
|
except sqlmapConnectionException, errMsg:
|
|
errMsg = getUnicode(errMsg)
|
|
raise sqlmapConnectionException, errMsg
|
|
|
|
return True
|