Re: Mkdir exploit for PDP-11 doesn't work

[Denis Solaro <dsolaro () freenet de>]

On Wed, 9 Jun 2004 18:36:31 -0400 (EDT)
Jonathan S <js () apollo gti net> wrote:

> Tim Newsham is right that there is an overflow present, but his exploit
> doesn't work (for me - it may work fine on his PDP-11 or emu).  A bus
> error is what happens, which is a good sign that the return address needs
> to be changed.  It sucks that there aren't very many tools in UnixV7,
> including text editors.
>
> Here's the log of me executing the code he posted (I'll probably have it
> fixed so it works in 5 minutes, with any luck):

This could be induced by a bad grounding of the main console.  It happened to me
a few times when I've touched on of the panels.  You get a slight jolt and then
a few error messages when the hard drive unit is activated.  This is slightly
annoying but doesn't lead to a real security problem for the PDP-11. 
In my case Apache crashes, but I didn't find any proofs of any files tempered
with.