/usr/share/w3af/plugins/grep/strangeParameters.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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strangeParameters.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.info as info
import core.data.kb.vuln as vuln
from core.data.db.temp_persist import disk_list
from core.controllers.w3afException import w3afException
import core.data.parsers.dpCache as dpCache
import core.data.parsers.urlParser as urlParser
import re
class strangeParameters(baseGrepPlugin):
'''
Grep the HTML response and find URIs that have strange parameters.
@author: Andres Riancho ( andres.riancho@gmail.com )
'''
def __init__(self):
baseGrepPlugin.__init__(self)
# Internal variables
self._already_reported = disk_list()
def grep(self, request, response):
'''
Plugin entry point.
@parameter request: The HTTP request object.
@parameter response: The HTTP response object
@return: None, all results are saved in the kb.
'''
try:
dp = dpCache.dpc.getDocumentParserFor( response )
except w3afException:
pass
else:
# Note:
# - With parsed_references I'm 100% that it's really something in the HTML
# that the developer intended to add.
#
# - The re_references are the result of regular expressions, which in some cases
# are just false positives.
parsed_references, re_references = dp.getReferences()
for ref in parsed_references:
qs = urlParser.getQueryString( ref )
for param_name in qs:
# This for loop is to address the repeated parameter name issue
for element_index in xrange(len(qs[param_name])):
if self._is_strange( request, param_name, qs[param_name][element_index] )\
and ref not in self._already_reported:
# Don't repeat findings
self._already_reported.append(ref)
i = info.info()
i.setName('Strange parameter')
i.setURI( ref )
i.setId( response.id )
msg = 'The URI: "' + i.getURI() + '" has a parameter named: "' + param_name
msg += '" with value: "' + qs[param_name][element_index] + '", which is quite odd.'
i.setDesc( msg )
i.setVar( param_name )
i['parameterValue'] = qs[param_name][element_index]
i.addToHighlight(qs[param_name][element_index])
kb.kb.append( self , 'strangeParameters' , i )
# To find this kind of vulns
# http://thedailywtf.com/Articles/Oklahoma-
# Leaks-Tens-of-Thousands-of-Social-Security-Numbers,-Other-
# Sensitive-Data.aspx
if self._is_SQL( request, param_name, qs[param_name][element_index] )\
and ref not in self._already_reported:
# Don't repeat findings
self._already_reported.append(ref)
v = vuln.vuln()
v.setName('Parameter has SQL sentence')
v.setURI( ref )
v.setId( response.id )
msg = 'The URI: "' + v.getURI() + '" has a parameter named: "' + param_name
msg +='" with value: "' + qs[param_name][element_index] + '", which is a SQL sentence.'
v.setDesc( msg )
v.setVar( param_name )
v['parameterValue'] = qs[param_name][element_index]
i.addToHighlight(qs[param_name][element_index])
kb.kb.append( self , 'strangeParameters' , 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( 'strangeParameters', 'strangeParameters' ), 'VAR' )
def _is_SQL(self, request, parameter, value):
'''
@return: True if the parameter value contains SQL sentences
'''
regex = '(SELECT .*? FROM|INSERT INTO .*? VALUES|UPDATE .*? SET .*? WHERE)'
for match in re.findall( regex, value, re.IGNORECASE):
if not self._wasSent(request, match):
return True
return False
def _is_strange(self, request, parameter, value):
'''
@return: True if the parameter value is strange
'''
_strange_parameter_re = []
# Seems to be a function
_strange_parameter_re.append('\w+\(.*?\)')
# Add more here...
#_strange_parameter_re.append('....')
for regex in _strange_parameter_re:
for match in re.findall( regex, value ):
if not self._wasSent(request, match):
return True
splitted_value = [ x for x in re.split( r'([a-zA-Z0-9. ]+)', value ) if x != '' ]
if len( splitted_value ) > 4:
if not self._wasSent(request, value):
return True
return False
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 all responses and tries to identify URIs with strange parameters, some examples of strange
parameters are:
- http://a/?b=method(a,c)
- http://a/?c=x|y|z|d
'''
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