bugtraq - Re: xscreensaver exploit for Redhat 7.3

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Message-ID: <20030306145627.B16036@enel.ucalgary.ca>
Date: Thu, 6 Mar 2003 14:56:27 -0700
From: Steven Leikeim <steven@...l.ucalgary.ca>
To: bugtraq@...urityfocus.com
Subject: Re: xscreensaver exploit for Redhat 7.3

On Thu, Mar 06, 2003 at 06:26:41PM -0000, Angelo Rosiello wrote:
> 
> I think you don't need other comments:
> 
> /*
> **
> ** Tested on rh 7.3 using XFree86
> ** xscreensaver vulnerability
> ** AUTHORS: Angelo Rosiello (Guilecool) & deka
> ** REQUIRES: X must be run!
> ** EFFECTS: local root exploit!
> **

Oddly enough, this does NOT work on my RedHat 7.3 installation. I have the
default xscreensaver RPM installed (xscreensaver-3.33-4).

When I run this, xscreensaver DOES dump core, however, xscreensaver is not
suid root and so will not itself give a root exploit. Perhaps there is an
expected interaction with the X server (which is running as root) but this
is not clear from Angelo's message.

Steven Leikeim
Department of Electrical and Computer Engineering
University of Calgary