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Patch for known NCHAR/UNION-query SQLi problems

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This commit is contained in:
Miroslav Stampar 2020-12-01 12:16:15 +01:00
parent c6557e2b45
commit 78ba33737e
4 changed files with 13 additions and 1 deletions
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3
lib/core/agent.py
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@ -499,6 +499,9 @@ class Agent(object):
if suffix:
nulledCastedField += suffix
if not kb.nchar:
nulledCastedField = re.sub(r"( AS )N(CHAR|VARCHAR)", r"\g<1>\g<2>", nulledCastedField)
return nulledCastedField
def nullCastConcatFields(self, fields):

1
lib/core/option.py
View File

@ -2071,6 +2071,7 @@ def _setKnowledgeBaseAttributes(flushAll=True):
kb.mergeCookies = None
kb.multipleCtrlC = False
kb.negativeLogic = False
kb.nchar = True
kb.nullConnection = None
kb.oldMsf = None
kb.orderByColumns = None

2
lib/core/settings.py
View File

@ -18,7 +18,7 @@ from lib.core.enums import OS
from thirdparty.six import unichr as _unichr
# sqlmap version (<major>.<minor>.<month>.<monthly commit>)
VERSION = "1.4.11.17"
VERSION = "1.4.12.0"
TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)

8
lib/techniques/union/use.py
View File

@ -157,12 +157,20 @@ def _oneShotUnionUse(expression, unpack=True, limited=False):
warnMsg += "(probably due to its length and/or content): "
warnMsg += safecharencode(trimmed)
logger.warn(warnMsg)
elif re.search(r"ORDER BY [^ ]+\Z", expression):
debugMsg = "retrying failed SQL query without the ORDER BY clause"
singleTimeDebugMessage(debugMsg)
expression = re.sub(r"\s*ORDER BY [^ ]+\Z", "", expression)
retVal = _oneShotUnionUse(expression, unpack, limited)
elif kb.nchar and re.search(r" AS N(CHAR|VARCHAR)", agent.nullAndCastField(expression)):
debugMsg = "turning off NATIONAL CHARACTER casting" # NOTE: in some cases there are "known" incompatibilities between original columns and NCHAR (e.g. http://testphp.vulnweb.com/artists.php?artist=1)
singleTimeDebugMessage(debugMsg)
kb.nchar = False
retVal = _oneShotUnionUse(expression, unpack, limited)
else:
vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
kb.unionDuplicates = vector[7]