oss-sec mailing list archives

Re: CVE id request: xscreensaver


From: Steffen Joeris <steffen.joeris () skolelinux de>
Date: Sun, 25 May 2008 23:54:58 +1000

Hi

On Sun, 25 May 2008 11:41:53 pm Tomas Hoger wrote:
On Sun, 25 May 2008 18:29:13 +1000 Steffen Joeris

<steffen.joeris () skolelinux de> wrote:
Pierre Habouzit discovered that resizing with the xrandr tool can
crash xscreensaver.

Debian Bug report:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=482385

The tested version of xscreensaver is 5.05-1, but at the moment there
is no reason to assume that the bug did not exist in previous
versions.

Is there any known attack vector crossing trust boundary?  Usage of
xrandr should be fully under the control of the user running
xscreensaver.
None that I know about. I assume that on a terminalserver it should not 
matter, since it would only crash the user's own xscreensaver and not others.

However, users might not be aware of this and just try to lock their screens 
and leave. IMHO it could be treated as a low security issue.

Cheers
Steffen

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