Share your story
The central voice for Linux and Open Source security news
Home News Topics Advisories HOWTOs Features Newsletters About Register

Sign up!
EnGarde Community
What is the most important Linux security technology?
Linux Events
Linux User Groups
Link to Us
Security Center
Book Reviews
Security Dictionary
Security Tips
White Papers
Featured Blogs
All About Linux
DanWalsh LiveJournal
Latest Newsletters
Linux Security Week: March 30th, 2015
Linux Advisory Watch: March 27th, 2015
LinuxSecurity Newsletters
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

RedHat: Low: gdm security and bug fix update Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
RedHat Linux Updated gdm packages that fix a security issue and several bugs are now available for Red Hat Enterprise Linux 5. This update has been rated as having low security impact by the Red Hat Security Response Team.
                   Red Hat Security Advisory

Synopsis:          Low: gdm security and bug fix update
Advisory ID:       RHSA-2009:1364-02
Product:           Red Hat Enterprise Linux
Advisory URL:
Issue date:        2009-09-02
CVE Names:         CVE-2009-2697 

1. Summary:

Updated gdm packages that fix a security issue and several bugs are now
available for Red Hat Enterprise Linux 5.

This update has been rated as having low security impact by the Red Hat
Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

3. Description:

The GNOME Display Manager (GDM) is a configurable re-implementation of XDM,
the X Display Manager. GDM allows you to log in to your system with the X
Window System running, and supports running several different X sessions on
your local machine at the same time.

A flaw was found in the way the gdm package was built. The gdm package was
missing TCP wrappers support, which could result in an administrator
believing they had access restrictions enabled when they did not.

This update also fixes the following bugs:

* the GDM Reference Manual is now included with the gdm packages. The
gdm-docs package installs this document in HTML format in
"/usr/share/doc/". (BZ#196054)

* GDM appeared in English on systems using Telugu (te_IN). With this
update, GDM has been localized in te_IN. (BZ#226931)

* the Ctrl+Alt+Backspace sequence resets the X server when in runlevel 5.
In previous releases, however, repeated use of this sequence prevented GDM
from starting the X server as part of the reset process. This was because
GDM sometimes did not notice the X server shutdown properly and would
subsequently fail to complete the reset process. This update contains an
added check to explicitly notify GDM whenever the X server is terminated,
ensuring that resets are executed reliably. (BZ#441971)

* the "gdm" user is now part of the "audio" group by default. This enables
audio support at the login screen. (BZ#458331)

* the gui/modules/dwellmouselistener.c source code contained incorrect
XInput code that prevented tablet devices from working properly. This
update removes the errant code, ensuring that tablet devices work as
expected. (BZ#473262)

* a bug in the XOpenDevice() function prevented the X server from starting
whenever a device defined in "/etc/X11/xorg.conf" was not actually plugged
in. This update wraps XOpenDevice() in the gdk_error_trap_pop() and
gdk_error_trap_push() functions, which resolves this bug. This ensures that
the X server can start properly even when devices defined in
"/etc/X11/xorg.conf" are not plugged in. (BZ#474588)

All users should upgrade to these updated packages, which resolve these
issues. GDM must be restarted for this update to take effect. Rebooting
achieves this, but changing the runlevel from 5 to 3 and back to 5 also
restarts GDM.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at

5. Bugs fixed (

239818 - CVE-2009-2697 gdm not built with tcp_wrappers
441971 - [RHEL5] GDM sometimes doesn't come back after ctrl-alt-backspace
458331 - Add supplementary audio group to the gdm user
473262 - Mouse cursor not movable when using tablet instead of mouse
474588 - gdmgreeter crashes if input device (ex wacom) is defined but not plugged

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):




Red Hat Enterprise Linux (v. 5 server):







These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from

7. References:

8. Contact:

The Red Hat security contact is .  More contact
details at

Copyright 2009 Red Hat, Inc.
< Prev   Next >


Latest Features
Peter Smith Releases Linux Network Security Online
Securing a Linux Web Server
Password guessing with Medusa 2.0
Password guessing as an attack vector
Squid and Digest Authentication
Squid and Basic Authentication
Demystifying the Chinese Hacking Industry: Earning 6 Million a Night
Free Online security course (LearnSIA) - A Call for Help
What You Need to Know About Linux Rootkits
Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition
Yesterday's Edition
MongoDB Patches Remote Denial-of-Service Vulnerability
DDoS Attack Against GitHub Continues After More Than Four Days
5 keys to hiring security talent
Partner Sponsor

Community | HOWTOs | Blogs | Features | Book Reviews | Networking
 Security Projects |  Latest News |  Newsletters |  SELinux |  Privacy |  Home
 Hardening |   About Us |   Advertise |   Legal Notice |   RSS |   Guardian Digital
(c)Copyright 2015 Guardian Digital, Inc. All rights reserved.