[Info-vax] Shell vulnerabilities, was: Re: What to do with my VAX.....

[Simon Clubley]

On 2020-10-25, abrsvc <dansabrservices at yahoo.com> wrote:
>
> Don't be too sure.  I am aware of a microcode bug for the RET instruction on the 11/780 that was discovered about 25 years after its introduction.  I know that it wasn't fixed because it was never found prior to that.  So, yes things can be wrong for an extended period of time without discovery.

Let me guess: it wasn't properly checking the current mode versus
the stored mode on the stack ?

I've never heard of this bug so that's just a guess based on the
fact you brought it up in a security discussion.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.