Moderate: gnome-screensaver security update

Advisory:	RHSA-2008:0218-2
Type:	Security Advisory
Severity:	Moderate
Issued on:	2008-05-21
Last updated on:	2008-05-21
Affected Products:	Red Hat Enterprise Linux (v. 5 server) Red Hat Enterprise Linux Desktop (v. 5 client)
OVAL:	com.redhat.rhsa-20080218.xml
CVEs (cve.mitre.org):	CVE-2008-0887

Details

An updated gnome-screensaver package that fixes a security flaw is now
available for Red Hat Enterprise Linux FasTrack 5.

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

gnome-screensaver is the GNOME project's official screen saver program.

A flaw was found in the way gnome-screensaver verified user passwords. When
a system used a remote directory service for login credentials, a local
attacker able to cause a network outage could cause gnome-screensaver to
crash, unlocking the screen. (CVE-2008-0887)

Users of gnome-screensaver should upgrade to this updated package, which
contains a backported patch to correct this issue.

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
http://kbase.redhat.com/faq/FAQ_58_10188

Updated packages

Red Hat Enterprise Linux (v. 5 server)

SRPMS:
gnome-screensaver-2.16.1-8.el5.src.rpm	`3bb52d6003af58fb125a0a1546d9eb51`

IA-32:
gnome-screensaver-2.16.1-8.el5.i386.rpm	`8cf8e6ce4a501383fd00d34415adb305`

IA-64:
gnome-screensaver-2.16.1-8.el5.ia64.rpm	`1607b7bb47964d5febc59ccfe4e40562`

PPC:
gnome-screensaver-2.16.1-8.el5.ppc.rpm	`a261eb85324def9c089369c8d9e04169`

s390x:
gnome-screensaver-2.16.1-8.el5.s390x.rpm	`e6e04626f089e816f9edb696e2d189dd`

x86_64:
gnome-screensaver-2.16.1-8.el5.x86_64.rpm	`0643aad826e74d333eef524ec81c34aa`

Red Hat Enterprise Linux Desktop (v. 5 client)

SRPMS:
gnome-screensaver-2.16.1-8.el5.src.rpm	`3bb52d6003af58fb125a0a1546d9eb51`

IA-32:
gnome-screensaver-2.16.1-8.el5.i386.rpm	`8cf8e6ce4a501383fd00d34415adb305`

x86_64:
gnome-screensaver-2.16.1-8.el5.x86_64.rpm	`0643aad826e74d333eef524ec81c34aa`

(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

435773 - CVE-2008-0887 gnome-screensaver using NIS auth will unlock if NIS goes away

References

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0887
http://www.redhat.com/security/updates/classification/#moderate

These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/