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Date:      Fri, 28 Jun 1996 11:27:31 -0700 (MST)
From:      Terry Lambert <terry@lambert.org>
To:        kuku@gilberto.physik.rwth-aachen.de (Christoph P. Kukulies)
Cc:        freebsd-questions@freefall.freebsd.org
Subject:   Re: java script and security violation message
Message-ID:  <199606281827.LAA08210@phaeton.artisoft.com>
In-Reply-To: <199606281105.NAA18849@gilberto.physik.rwth-aachen.de> from "Christoph P. Kukulies" at Jun 28, 96 01:05:48 pm

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> Yesterday I browsed some web sites in Germany from my home machine
> (2.2-current) using netscape (not sure whether it was 2.0 or 3.0b4).
> 
> Anyway I got an alert box several times saying something of
> security violation in Java script line xxx.
> 
> It looked a bit like I had to be concerned about it. What does it mean?
> Is it a security issue? BTW, I was root while doing this - maybe not 
> a good idea to run netscape while being root anyway.

There are several well known holes in JAVA.  One of them uses a two
system user environment attack: it takes advantage of known variables
in shared scoping to hack you.

This is the kind of bug that was fixed in Netscape 3.0b3 and 3.0b4
(at the same time, these "sparse space" IPC facilities were what
enabled the JDK to operate, so unless you run 3.0b2, you can't run
the JDK).

Search Yahoo for "JAVA security".  There are several "crack demonstration
pages" you can play with.


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.



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