[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Bug#564080: marked as done (xscreensaver can be killed with Alt+SysRq+F)

Your message dated Sun, 18 Apr 2010 16:28:23 +0200
with message-id <20100418142823.GA6238@patate.is-a-geek.org>
and subject line Re: Bug#562884: proposals
has caused the Debian Bug report #564080,
regarding xscreensaver can be killed with Alt+SysRq+F
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
564080: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=564080
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: xscreensaver
Version: 4.24-5
Severity: grave
Tags: security
Justification: user security hole

Hi,

I'm a bit new to this bugreporting stuff. I have however discovered that it
is possible to kill xscreensaver with Alt+SysRq+F (if this function is not
disabled). This may comprimise security when xscreensaver-command is used
with the -lock option, because the screen will be unlocked.

gnome-screensaver seems not to be vulnerable to this attack.

--- End Message ---
--- Begin Message --- 
On Thu, Jan  7, 2010 at 16:39:05 +0100, Holger Levsen wrote:

> IMO either the screensaver should disable sysrq while it's locked (and enable 
> it after locking) or the screensaver shouldnt lock the screen, when sysrq is 
> enabled (and output a warning message).
> 
I don't think there's anything the screensavers can sensibly do there.
So I'm going to close this bug.

Version 2.6.32-9 of the Debian kernel includes a change by Bastian Blank
to restrict access to sensitive SysRq keys by default, which should
cover this.

Cheers,
Julien

Attachment: signature.asc
Description: Digital signature


--- End Message ---
Reply to: