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added protection mechanism against reflected values

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This commit is contained in:
Miroslav Stampar 2011-02-24 16:52:46 +00:00
parent 38dc82e13e
commit 708ddf5608
2 changed files with 12 additions and 0 deletions
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3
lib/core/settings.py
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@ -265,3 +265,6 @@ MYSQL_ERROR_CHUNK_LENGTH = 50
# Do not unescape the injected statement if it contains any of the following SQL words # Do not unescape the injected statement if it contains any of the following SQL words
EXCLUDE_UNESCAPE = ("WAITFOR DELAY ", " INTO DUMPFILE ", " INTO OUTFILE ", "CREATE ", "BULK ", "EXEC ", "RECONFIGURE ", "DECLARE ", CHAR_INFERENCE_MARK) EXCLUDE_UNESCAPE = ("WAITFOR DELAY ", " INTO DUMPFILE ", " INTO OUTFILE ", "CREATE ", "BULK ", "EXEC ", "RECONFIGURE ", "DECLARE ", CHAR_INFERENCE_MARK)
# Mark used for replacement of reflected values
REFLECTED_VALUE_MARKER = '__REFLECTED_VALUE__'

9
lib/techniques/inband/union/use.py
View File

@ -13,6 +13,7 @@ import time
from lib.core.agent import agent from lib.core.agent import agent
from lib.core.common import Backend from lib.core.common import Backend
from lib.core.common import calculateDeltaSeconds from lib.core.common import calculateDeltaSeconds
from lib.core.common import filterStringValue
from lib.core.common import getUnicode from lib.core.common import getUnicode
from lib.core.common import initTechnique from lib.core.common import initTechnique
from lib.core.common import isNumPosStrValue from lib.core.common import isNumPosStrValue
@ -26,6 +27,7 @@ from lib.core.enums import DBMS
from lib.core.enums import PAYLOAD from lib.core.enums import PAYLOAD
from lib.core.exception import sqlmapSyntaxException from lib.core.exception import sqlmapSyntaxException
from lib.core.settings import FROM_TABLE from lib.core.settings import FROM_TABLE
from lib.core.settings import REFLECTED_VALUE_MARKER
from lib.core.unescaper import unescaper from lib.core.unescaper import unescaper
from lib.request.connect import Connect as Request from lib.request.connect import Connect as Request
from lib.utils.resume import resume from lib.utils.resume import resume
@ -53,6 +55,13 @@ def __oneShotUnionUse(expression, unpack=True):
page, headers = Request.queryPage(payload, content=True, raise404=False) page, headers = Request.queryPage(payload, content=True, raise404=False)
content = "%s%s" % (page or "", listToStrValue(headers.headers if headers else None) or "") content = "%s%s" % (page or "", listToStrValue(headers.headers if headers else None) or "")
reflective = filterStringValue(agent.removePayloadDelimiters(payload), r'[A-Za-z0-9]', r'[^\s]+')
filtered = re.sub(reflective, REFLECTED_VALUE_MARKER, content)
if filtered != content:
warnMsg = "reflective value found and filtered"
logger.warn(warnMsg)
content = filtered
reqCount += 1 reqCount += 1
if kb.misc.start not in content or kb.misc.stop not in content: if kb.misc.start not in content or kb.misc.stop not in content: