gnome-screensaver: Privilege escalation — GLSA 200804-12

gnome-screensaver allows local users to bypass authentication under certain configurations.

Affected Packages

gnome-extra/gnome-screensaver on all architectures
Affected versions < 2.20.0-r3
Unaffected versions >= 2.20.0-r3

Background

gnome-screensaver is a screensaver, designed to integrate with the Gnome desktop, that can replace xscreensaver.

Description

gnome-screensaver incorrectly handles the results of the getpwuid() function in the file src/setuid.c when using directory servers (like NIS) during a network outage, a similar issue to GLSA 200705-14.

Impact

A local user can crash gnome-xscreensaver by preventing network connectivity if the system uses a remote directory service for credentials such as NIS or LDAP, which will unlock the screen.

Workaround

There is no known workaround at this time.

Resolution

All gnome-screensaver users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=gnome-extra/gnome-screensaver-2.20.0-r3"

References

Release Date
April 11, 2008

Latest Revision
April 11, 2008: 01

Severity
normal

Exploitable
local

Bugzilla entries