Dear Andres, I've written a brand new SESSION FIXATION audit plugin. the step is : the Plugin will Find freqs that contain SSID, change this SSID and send to server. If Server don't provide new SSID => VULN otherwise, NO VULN
I've created 2 very simple PHP scripts : one is vulnerable to Session fixaton, one is none I tested with these 2 script. The plugin runs fine. But, Please review and give me comments.. If it's wrong, I will fix it again.. :( Thank you very much -- Best Regards, Summer Nguyen .
''' session_fixation.py Copyright 2006 Andres Riancho This file is part of w3af, w3af.sourceforge.net . w3af is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation version 2 of the License. w3af is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with w3af; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ''' import core.controllers.outputManager as om from core.data.dc.form import form as form # options from core.data.options.option import option from core.data.options.optionList import optionList from core.controllers.basePlugin.baseAuditPlugin import baseAuditPlugin from core.data.fuzzer.fuzzer import createMutants, createRandAlNum from core.controllers.w3afException import w3afException import core.data.kb.knowledgeBase as kb import core.data.kb.vuln as vuln import core.data.constants.severity as severity import string class session_fixation(baseAuditPlugin): ''' Find SESSION FIXATION vulnerabilities. @author: Summer Nguyen (summer0ngu...@gmail.com) ''' def __init__(self): baseAuditPlugin.__init__(self) self._fuzzableRequests = [] self._SSID='' self._SSIDparam='' self._fakeSSID='' def audit(self, freq ): ''' Tests an URL for Session Fixation vulnerabilities. @param freq: A fuzzableRequest ''' om.out.debug( 'Session Fixation plugin is testing: ' + freq.getURL() ) self._fuzzableRequests.append(freq) if self._hasSSID(freq): # The plugin only test the URL that may respond SESSID self._checkvuln(freq) def _checkvuln(self,freq): ''' Generate New SSID from original SSSID, send it and get response I don't want to set fake_SSID=1234.. ^_^ ''' SSID="" for i,A in enumerate(self._SSID): if i%5==1: SSID+="0" else: SSID+=A self._fakeSSID=SSID Cookie= str(freq.getCookie()) Cookie=Cookie.replace(self._SSID,SSID); freq.setCookie(Cookie) targs = (freq,) self._tm.startFunction( target=self._sendMutant, args=targs, ownerObj=self ) def _hasSSID( self, freq ): ''' Check if the server provided SSID ''' Cookie= str(freq.getCookie()) if (self._SSIDparam==''): params=self._getSSIDparam() else: params=[self._SSIDparam] for param in params: num=string.find(Cookie,param) if num!=-1: SSID="" end=False i=1 while not end: char=Cookie[num+len(param)+i] if char!=';': SSID+=char else: end=True i=i+1 self._SSIDparam=param self._SSID=SSID self._hasID=True return True return False def _analyzeResult( self, mutant, response ): ''' Do we have Session Fixation VULN?? @return: None, record all the results in the kb. ''' vulne=False res=response.getHeaders() if 'Set-Cookie' in res: num=string.find(res['Set-Cookie'],self._SSIDparam) if num== -1: vulne=True else: SSID='' char='' i=1 end=False while not end: ## Get the SSID value char=res['Set-Cookie'][num+len(self._SSIDparam)+i] if char!=';': SSID+=char else: end=True i=i+1 if SSID==self._fakeSSID: vulne=True else: vulne=True if vulne: ## there is VULN print mutant.getURL() print "VULN" v = vuln.vuln( mutant ) v.setId( response.id ) v.setName( 'Session Fixation vulnerability' ) v.setSeverity(severity.MEDIUM) kb.kb.append( self, 'sessionfixation', v ) def _getSSIDparam(self ): ''' SSID parameters, Please add more parameters ''' param=[] param.append('JSESSIONID') param.append('wordpress_test_cookie') param.append('PHPSESSIONID') param.append('SID') param.append('PHPSESSID') return param def getOptions( self ): ''' @return: A list of option objects for this plugin. ''' ol = optionList() return ol def setOptions( self, optionsMap ): ''' This method sets all the options that are configured using the user interface generated by the framework using the result of getOptions(). @parameter OptionList: A dictionary with the options for the plugin. @return: No value is returned. ''' pass def getPluginDeps( self ): ''' @return: A list with the names of the plugins that should be runned before the current one. ''' return [] def getLongDesc( self ): ''' @return: A DETAILED description of the plugin functions and features. ''' return ''' This plugin finds SESSION FIXATION vulnerabilities. To find SESSION FIXATION Vulnerability, the Plugin will Find freqs that contain SSID, change this SSID and send to server. If Server don't provide new SSID => VULN otherwise, NO VULN '''
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