USN-669-1: gnome-screensaver vulnerabilities

Ubuntu Security Notice USN-669-1

11th November, 2008

gnome-screensaver vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 7.10
  • Ubuntu 6.06 LTS

Software description

  • gnome-screensaver

Details

It was discovered that the notify feature in gnome-screensaver could let
a local attacker read the clipboard contents of a locked session by
using Ctrl-V. (CVE-2007-6389)

Alan Matsuoka discovered that gnome-screensaver did not properly handle
network outages when using a remote authentication service. During a
network interruption, or by disconnecting the network cable, a local
attacker could gain access to locked sessions. (CVE-2008-0887)

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 7.10:
gnome-screensaver 2.20.0-0ubuntu4.3
Ubuntu 6.06 LTS:
gnome-screensaver 2.14.3-0ubuntu1.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system upgrade you need to restart all user sessions on
your computer to effect the necessary changes.

References

CVE-2007-6389, CVE-2008-0887