/usr/share/w3af/plugins/grep/domXss.py is in w3af-console 1.0-rc3svn3489-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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domXss.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
# options
from core.data.options.option import option
from core.data.options.optionList import optionList
from core.controllers.basePlugin.baseGrepPlugin import baseGrepPlugin
import core.data.kb.knowledgeBase as kb
import core.data.kb.vuln as vuln
import core.data.constants.severity as severity
import re
class domXss(baseGrepPlugin):
'''
Grep every page for traces of DOM XSS.
@author: Andres Riancho ( andres.riancho@gmail.com )
'''
def __init__(self):
baseGrepPlugin.__init__(self)
#
# Compile the regular expressions
#
self._script_re = re.compile('< *script *>(.*?)</ *script *>', re.IGNORECASE | re.DOTALL )
# Function regular expressions
self._function_names_re = [ re.compile(i, re.IGNORECASE) for i in self._get_function_names() ]
def _get_function_names( self ):
'''
@return: A list of function names that can be used as an attack
vector in DOM XSS
'''
res = []
res.append('document.write')
res.append('document.writeln')
res.append('document.execCommand')
res.append('document.open')
res.append('window.open')
res.append('eval')
res.append('window.execScript')
# Add the function invocation regex that matches:
# eval( a )
# eval ( abc )
# eval( 'def' )
res = [ i + ' *\((.*?)\)' for i in res ]
return res
def _get_DOM_user_controlled( self ):
'''
@return: A list of user controlled variables that can be used as an attack
vector in DOM XSS.
'''
res = []
res.append('document.URL')
res.append('document.URLUnencoded')
res.append('document.location')
res.append('document.referrer')
res.append('window.location')
return res
def grep(self, request, response):
'''
Plugin entry point, search for the DOM XSS vulns.
@parameter request: The HTTP request object.
@parameter response: The HTTP response object
@return: None
'''
if response.is_text_or_html():
match = self._script_re.search( response.getBody() )
if match:
for script_code in match.groups():
for function_re in self._function_names_re:
parameters = function_re.search( script_code )
if parameters:
for user_controlled in self._get_DOM_user_controlled():
if user_controlled in parameters.groups()[0]:
v = vuln.vuln()
v.addToHighlight(user_controlled)
v.setURL( response.getURL() )
v.setId( response.id )
v.setSeverity(severity.LOW)
v.setName( 'DOM Cross site scripting' )
msg = 'The URL: "' + v.getURL() + '" has a DOM XSS '
msg += 'bug using this DOM object: "'+ user_controlled + '".'
v.setDesc(msg)
kb.kb.append( self, 'domXss', v )
def setOptions( self, OptionList ):
pass
def getOptions( self ):
'''
@return: A list of option objects for this plugin.
'''
ol = optionList()
return ol
def end(self):
'''
This method is called when the plugin wont be used anymore.
'''
self.printUniq( kb.kb.getData( 'domXss', 'domXss' ), 'URL' )
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 greps every page for traces of DOM XSS. An interesting paper about DOM XSS
can be found here:
- http://www.webappsec.org/projects/articles/071105.shtml
'''
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