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Category: Application (Generic) > XScreenSaver

Vendors: Zawinski, Jamie

(Red Hat Issues Fix) XScreenSaver rdesktop May Display the Screensaver Password in Another Window

SecurityTracker Alert ID: 1016151

SecurityTracker URL: http://securitytracker.com/id?1016151

CVE Reference: CVE-2004-2655 (Links to External Site)

Date: May 24 2006

Impact: Disclosure of authentication information

Fix Available: Yes Vendor Confirmed: Yes

Advisory: Red Hat Advisory

Version(s): 4.14; possibly other versions

Description: A vulnerability was reported in XScreenSaver when used with rdesktop. The password may be displayed in another window.

rdesktop may not properly release the keyboard focus when xscreensaver starts. As a result, the user's screensaver password may be entered into the active window when the target user unlocks the screen.

This may occur when xscreensaver is activated and an rdesktop session is active.

[Editor's note: The vulnerability was reported in August 2004.]

Impact: The user's screensaver password may be entered into the active window.

Vendor URL: www.jwz.org/xscreensaver/ (Links to External Site)

Cause: State error

Underlying OS: Linux (Red Hat Enterprise)

Underlying OS Comments: 2.1, 3

Reported By: bugzilla@redhat.com

Message History: This archive entry is a follow-up to the message listed below.

May 24 2006

XScreenSaver rdesktop May Display the Screensaver Password in Another Window

Source Message Contents

Date: Tue, 23 May 2006 16:52:29 -0400
From: bugzilla@redhat.com
Subject: [RHSA-2006:0498-01] Moderate: xscreensaver security update

 

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Moderate: xscreensaver security update
Advisory ID:       RHSA-2006:0498-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2006-0498.html
Issue date:        2006-05-23
Updated on:        2006-05-23
Product:           Red Hat Enterprise Linux
CVE Names:         CVE-2003-1294 CVE-2004-2655 
- ---------------------------------------------------------------------

1. Summary:

An updated xscreensaver package that fixes two security flaws is now
available for Red Hat Enterprise Linux 2.1 and 3.

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

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386
Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64

3. Problem description:

XScreenSaver is a collection of screensavers.

A keyboard focus flaw was found in the way XScreenSaver prompts the user to
enter their password to unlock the screen. XScreenSaver did not properly
ensure it had proper keyboard focus, which could leak a users password to
the program with keyboard focus. This behavior is not common, as only certain
applications exhibit this focus error. (CVE-2004-2655)

Several flaws were found in the way various XScreenSaver screensavers
create temporary files. It may be possible for a local attacker to create a
temporary file in way that could overwrite a different file to which the user
running XScreenSaver has write permissions. (CVE-2003-1294)

Users of XScreenSaver should upgrade to this updated package, which
contains backported patches to correct these issues.

4. Solution:

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

This update is available via Red Hat Network.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed (http://bugzilla.redhat.com/):

182287 - CVE-2003-1294 xscreensaver temporary file flaws
188149 - CVE-2004-2655 xscreensaver passes password to other applications

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/xscreensaver-3.33-4.rhel21.3.src.rpm
f8a3f186605e8c1e94118d560724cd0c  xscreensaver-3.33-4.rhel21.3.src.rpm

i386:
3f48fa1db2d0c4224dd968a3a4a10033  xscreensaver-3.33-4.rhel21.3.i386.rpm

ia64:
dfe54c3a32cc18cd4cdf4ccfe073cba0  xscreensaver-3.33-4.rhel21.3.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/xscreensaver-3.33-4.rhel21.3.src.rpm
f8a3f186605e8c1e94118d560724cd0c  xscreensaver-3.33-4.rhel21.3.src.rpm

ia64:
dfe54c3a32cc18cd4cdf4ccfe073cba0  xscreensaver-3.33-4.rhel21.3.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/xscreensaver-3.33-4.rhel21.3.src.rpm
f8a3f186605e8c1e94118d560724cd0c  xscreensaver-3.33-4.rhel21.3.src.rpm

i386:
3f48fa1db2d0c4224dd968a3a4a10033  xscreensaver-3.33-4.rhel21.3.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/xscreensaver-3.33-4.rhel21.3.src.rpm
f8a3f186605e8c1e94118d560724cd0c  xscreensaver-3.33-4.rhel21.3.src.rpm

i386:
3f48fa1db2d0c4224dd968a3a4a10033  xscreensaver-3.33-4.rhel21.3.i386.rpm

Red Hat Enterprise Linux AS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/xscreensaver-4.10-20.src.rpm
aeb44a2230e0891747e7c678e165c2b0  xscreensaver-4.10-20.src.rpm

i386:
32064f1c5108a2fc8d440099113a915f  xscreensaver-4.10-20.i386.rpm
c3c5cbe5a9f4dc689ba1cc8168dfda10  xscreensaver-debuginfo-4.10-20.i386.rpm

ia64:
ac46f647bd7930f3dcf10b74d4f8f9ec  xscreensaver-4.10-20.ia64.rpm
ebf73db97fdda4f4d65e6897050ca206  xscreensaver-debuginfo-4.10-20.ia64.rpm

ppc:
6023bea1b1145194a72487f7418b9c8b  xscreensaver-4.10-20.ppc.rpm
fcb479f611c9053efd9d845bcdbc7ffe  xscreensaver-debuginfo-4.10-20.ppc.rpm

s390:
0e9f6a02afe107a9b52334eb89c0a0b1  xscreensaver-4.10-20.s390.rpm
26f350733c38fc054ea14b3cf8f08b77  xscreensaver-debuginfo-4.10-20.s390.rpm

s390x:
e48435174e377c0c7b78b2f87c16aab5  xscreensaver-4.10-20.s390x.rpm
7772d366de77b390edd9e3593b1d6d5b  xscreensaver-debuginfo-4.10-20.s390x.rpm

x86_64:
83193c35d8ddf707af150d1e507fdc61  xscreensaver-4.10-20.x86_64.rpm
0177ce9d9a124b43310f450212ef271a  xscreensaver-debuginfo-4.10-20.x86_64.rpm

Red Hat Desktop version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/xscreensaver-4.10-20.src.rpm
aeb44a2230e0891747e7c678e165c2b0  xscreensaver-4.10-20.src.rpm

i386:
32064f1c5108a2fc8d440099113a915f  xscreensaver-4.10-20.i386.rpm
c3c5cbe5a9f4dc689ba1cc8168dfda10  xscreensaver-debuginfo-4.10-20.i386.rpm

x86_64:
83193c35d8ddf707af150d1e507fdc61  xscreensaver-4.10-20.x86_64.rpm
0177ce9d9a124b43310f450212ef271a  xscreensaver-debuginfo-4.10-20.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/xscreensaver-4.10-20.src.rpm
aeb44a2230e0891747e7c678e165c2b0  xscreensaver-4.10-20.src.rpm

i386:
32064f1c5108a2fc8d440099113a915f  xscreensaver-4.10-20.i386.rpm
c3c5cbe5a9f4dc689ba1cc8168dfda10  xscreensaver-debuginfo-4.10-20.i386.rpm

ia64:
ac46f647bd7930f3dcf10b74d4f8f9ec  xscreensaver-4.10-20.ia64.rpm
ebf73db97fdda4f4d65e6897050ca206  xscreensaver-debuginfo-4.10-20.ia64.rpm

x86_64:
83193c35d8ddf707af150d1e507fdc61  xscreensaver-4.10-20.x86_64.rpm
0177ce9d9a124b43310f450212ef271a  xscreensaver-debuginfo-4.10-20.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/xscreensaver-4.10-20.src.rpm
aeb44a2230e0891747e7c678e165c2b0  xscreensaver-4.10-20.src.rpm

i386:
32064f1c5108a2fc8d440099113a915f  xscreensaver-4.10-20.i386.rpm
c3c5cbe5a9f4dc689ba1cc8168dfda10  xscreensaver-debuginfo-4.10-20.i386.rpm

ia64:
ac46f647bd7930f3dcf10b74d4f8f9ec  xscreensaver-4.10-20.ia64.rpm
ebf73db97fdda4f4d65e6897050ca206  xscreensaver-debuginfo-4.10-20.ia64.rpm

x86_64:
83193c35d8ddf707af150d1e507fdc61  xscreensaver-4.10-20.x86_64.rpm
0177ce9d9a124b43310f450212ef271a  xscreensaver-debuginfo-4.10-20.x86_64.rpm

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

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-1294
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-2655
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2006 Red Hat, Inc.
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