Re: Sun Java Plugin arbitrary package access vulnerability

[Juergen Schmidt <ju () heisec de>]

On Tue, 23 Nov 2004, Jouko Pynnonen wrote:

>  [script language=javascript]
>  var c=document.applets[0].getClass().forName('sun.text.Utility');
>  alert('got Class object: '+c)
>  [/script]

I implemented a short demonstration out of this. It works with 1.4.2_05
and IE/Mozilla.

I tried this with Debian (unstable, j2re1.4) which uses a Java "1.4.1"
from Blackdown.
It does not work.
Does this mean Blackdowns Java is not vulnerable? Or is testing for
"sun.text.Utility" not adequate for this.

The class sun.text.Utility is present in rt.jar.

bye, ju

-- 
Juergen Schmidt       Chefredakteur  heise Security     www.heisec.de
Heise Zeitschriften Verlag,    Helstorferstr. 7,       D-30625 Hannover
Tel. +49 511 5352 300      FAX +49 511 5352 417       EMail ju () heisec de
GPG-Key: 0x38EA4970,  5D7B 476D 84D5 94FF E7C5  67BE F895 0A18 38EA 4970

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