Articles / Red Hat: An updated xscreen…

Red Hat: An updated xscreensaver package fixes a security flaw

XScreenSaver is a collection of screensavers. Alex Yamauchi discovered a flaw in the way XScreenSaver verifies user passwords. When a system is using a remote directory service for login credentials, a local attacker may be able to cause a network outage causing XScreenSaver to crash, unlocking the screen. Fixed packages are available from updates.redhat.com.
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                   Red Hat Security Advisory

Synopsis:          Important: xscreensaver security update
Advisory ID:       RHSA-2007:0322-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2007-0322.html
Issue date:        2007-05-02
Updated on:        2007-05-02
Product:           Red Hat Enterprise Linux
CVE Names:         CVE-2007-1859 
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1. Summary:

An updated xscreensaver package that fixes a security flaw is now
available for Red Hat Enterprise Linux 2.1, 3, and 4.

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
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Problem description:

XScreenSaver is a collection of screensavers.

Alex Yamauchi discovered a flaw in the way XScreenSaver verifies user
passwords. When a system is using a remote directory service for login
credentials, a local attacker may be able to cause a network outage causing
XScreenSaver to crash, unlocking the screen. (CVE-2007-1859)

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

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

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

237003 - CVE-2007-1859 xscreensaver authentication bypass

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.rhel21.5.src.rpm
8a6adffc86a33ea016d56fec422749c4  xscreensaver-3.33-4.rhel21.5.src.rpm

i386:
1305dcb9528278bb67d6815bede83175  xscreensaver-3.33-4.rhel21.5.i386.rpm

ia64:
c2c49fdc9a8177b611594174e8aee896  xscreensaver-3.33-4.rhel21.5.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/xscreensaver-3.33-4.rhel21.5.src.rpm
8a6adffc86a33ea016d56fec422749c4  xscreensaver-3.33-4.rhel21.5.src.rpm

ia64:
c2c49fdc9a8177b611594174e8aee896  xscreensaver-3.33-4.rhel21.5.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.rhel21.5.src.rpm
8a6adffc86a33ea016d56fec422749c4  xscreensaver-3.33-4.rhel21.5.src.rpm

i386:
1305dcb9528278bb67d6815bede83175  xscreensaver-3.33-4.rhel21.5.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.rhel21.5.src.rpm
8a6adffc86a33ea016d56fec422749c4  xscreensaver-3.33-4.rhel21.5.src.rpm

i386:
1305dcb9528278bb67d6815bede83175  xscreensaver-3.33-4.rhel21.5.i386.rpm

Red Hat Enterprise Linux AS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/xscreensaver-4.10-21.el3.src.rpm
a220a11b582081c9cafd1f0e235296a8  xscreensaver-4.10-21.el3.src.rpm

i386:
56b75d892fefa3c2be32f174d89f5afe  xscreensaver-4.10-21.el3.i386.rpm
20b1db46a6078a94d15c30a8a5efe410  xscreensaver-debuginfo-4.10-21.el3.i386.rpm

ia64:
09673d8d04b1d463b5ec84b4c3168711  xscreensaver-4.10-21.el3.ia64.rpm
c346ed5b5dd17266491cf3f29e7ed57d  xscreensaver-debuginfo-4.10-21.el3.ia64.rpm

ppc:
2b0de920c2f5a3ab1de6a94f6fe77d81  xscreensaver-4.10-21.el3.ppc.rpm
a703bbab998ec0f8f92913bb5809fa02  xscreensaver-debuginfo-4.10-21.el3.ppc.rpm

s390:
8ebf220e235b40e03978b68e47849f20  xscreensaver-4.10-21.el3.s390.rpm
7de1a22ed98f6c1d36e636988cd42d0c  xscreensaver-debuginfo-4.10-21.el3.s390.rpm

s390x:
1c1fabdd8d673682f837531696e6b5d9  xscreensaver-4.10-21.el3.s390x.rpm
6b66fb542fb310e57277278a2d46d49a  xscreensaver-debuginfo-4.10-21.el3.s390x.rpm

x86_64:
2e8945b59e3fa57d91b17d8901a2d2b3  xscreensaver-4.10-21.el3.x86_64.rpm
44400cfa9b520a0d00a76d21b00bb2fb  xscreensaver-debuginfo-4.10-21.el3.x86_64.rpm

Red Hat Desktop version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/xscreensaver-4.10-21.el3.src.rpm
a220a11b582081c9cafd1f0e235296a8  xscreensaver-4.10-21.el3.src.rpm

i386:
56b75d892fefa3c2be32f174d89f5afe  xscreensaver-4.10-21.el3.i386.rpm
20b1db46a6078a94d15c30a8a5efe410  xscreensaver-debuginfo-4.10-21.el3.i386.rpm

x86_64:
2e8945b59e3fa57d91b17d8901a2d2b3  xscreensaver-4.10-21.el3.x86_64.rpm
44400cfa9b520a0d00a76d21b00bb2fb  xscreensaver-debuginfo-4.10-21.el3.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/xscreensaver-4.10-21.el3.src.rpm
a220a11b582081c9cafd1f0e235296a8  xscreensaver-4.10-21.el3.src.rpm

i386:
56b75d892fefa3c2be32f174d89f5afe  xscreensaver-4.10-21.el3.i386.rpm
20b1db46a6078a94d15c30a8a5efe410  xscreensaver-debuginfo-4.10-21.el3.i386.rpm

ia64:
09673d8d04b1d463b5ec84b4c3168711  xscreensaver-4.10-21.el3.ia64.rpm
c346ed5b5dd17266491cf3f29e7ed57d  xscreensaver-debuginfo-4.10-21.el3.ia64.rpm

x86_64:
2e8945b59e3fa57d91b17d8901a2d2b3  xscreensaver-4.10-21.el3.x86_64.rpm
44400cfa9b520a0d00a76d21b00bb2fb  xscreensaver-debuginfo-4.10-21.el3.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/xscreensaver-4.10-21.el3.src.rpm
a220a11b582081c9cafd1f0e235296a8  xscreensaver-4.10-21.el3.src.rpm

i386:
56b75d892fefa3c2be32f174d89f5afe  xscreensaver-4.10-21.el3.i386.rpm
20b1db46a6078a94d15c30a8a5efe410  xscreensaver-debuginfo-4.10-21.el3.i386.rpm

ia64:
09673d8d04b1d463b5ec84b4c3168711  xscreensaver-4.10-21.el3.ia64.rpm
c346ed5b5dd17266491cf3f29e7ed57d  xscreensaver-debuginfo-4.10-21.el3.ia64.rpm

x86_64:
2e8945b59e3fa57d91b17d8901a2d2b3  xscreensaver-4.10-21.el3.x86_64.rpm
44400cfa9b520a0d00a76d21b00bb2fb  xscreensaver-debuginfo-4.10-21.el3.x86_64.rpm

Red Hat Enterprise Linux AS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/xscreensaver-4.18-5.rhel4.14.src.rpm
428684b85a28e52cc022bacc09b4b338  xscreensaver-4.18-5.rhel4.14.src.rpm

i386:
bced2ed92fa640bf57122b25d53b0d68  xscreensaver-4.18-5.rhel4.14.i386.rpm
9d562052fe864f4c10fae69737b22dcc  xscreensaver-debuginfo-4.18-5.rhel4.14.i386.rpm

ia64:
dc05e1da2ec2036d9484cc6942e1a4c0  xscreensaver-4.18-5.rhel4.14.ia64.rpm
66f3365f0a732f907adf81b0449bf194  xscreensaver-debuginfo-4.18-5.rhel4.14.ia64.rpm

ppc:
a8a612bd4246cb5154ea5ebc3ca7c97c  xscreensaver-4.18-5.rhel4.14.ppc.rpm
3319fef0e24b8b7d461a55ddcc492f51  xscreensaver-debuginfo-4.18-5.rhel4.14.ppc.rpm

s390:
504bb00f11b25c989c686cfd3e7c7bea  xscreensaver-4.18-5.rhel4.14.s390.rpm
3cbe9228c554a3a822f1f3adbfb652b1  xscreensaver-debuginfo-4.18-5.rhel4.14.s390.rpm

s390x:
e81fab0d8e34bcd3665deb525b7177d4  xscreensaver-4.18-5.rhel4.14.s390x.rpm
a7ed869a39c91a1a0f55f9b10f9d740f  xscreensaver-debuginfo-4.18-5.rhel4.14.s390x.rpm

x86_64:
84443b21b382b568d96386c94b185df8  xscreensaver-4.18-5.rhel4.14.x86_64.rpm
7bd71f9028c883bc014bc55530be77a3  xscreensaver-debuginfo-4.18-5.rhel4.14.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/xscreensaver-4.18-5.rhel4.14.src.rpm
428684b85a28e52cc022bacc09b4b338  xscreensaver-4.18-5.rhel4.14.src.rpm

i386:
bced2ed92fa640bf57122b25d53b0d68  xscreensaver-4.18-5.rhel4.14.i386.rpm
9d562052fe864f4c10fae69737b22dcc  xscreensaver-debuginfo-4.18-5.rhel4.14.i386.rpm

x86_64:
84443b21b382b568d96386c94b185df8  xscreensaver-4.18-5.rhel4.14.x86_64.rpm
7bd71f9028c883bc014bc55530be77a3  xscreensaver-debuginfo-4.18-5.rhel4.14.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/xscreensaver-4.18-5.rhel4.14.src.rpm
428684b85a28e52cc022bacc09b4b338  xscreensaver-4.18-5.rhel4.14.src.rpm

i386:
bced2ed92fa640bf57122b25d53b0d68  xscreensaver-4.18-5.rhel4.14.i386.rpm
9d562052fe864f4c10fae69737b22dcc  xscreensaver-debuginfo-4.18-5.rhel4.14.i386.rpm

ia64:
dc05e1da2ec2036d9484cc6942e1a4c0  xscreensaver-4.18-5.rhel4.14.ia64.rpm
66f3365f0a732f907adf81b0449bf194  xscreensaver-debuginfo-4.18-5.rhel4.14.ia64.rpm

x86_64:
84443b21b382b568d96386c94b185df8  xscreensaver-4.18-5.rhel4.14.x86_64.rpm
7bd71f9028c883bc014bc55530be77a3  xscreensaver-debuginfo-4.18-5.rhel4.14.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/xscreensaver-4.18-5.rhel4.14.src.rpm
428684b85a28e52cc022bacc09b4b338  xscreensaver-4.18-5.rhel4.14.src.rpm

i386:
bced2ed92fa640bf57122b25d53b0d68  xscreensaver-4.18-5.rhel4.14.i386.rpm
9d562052fe864f4c10fae69737b22dcc  xscreensaver-debuginfo-4.18-5.rhel4.14.i386.rpm

ia64:
dc05e1da2ec2036d9484cc6942e1a4c0  xscreensaver-4.18-5.rhel4.14.ia64.rpm
66f3365f0a732f907adf81b0449bf194  xscreensaver-debuginfo-4.18-5.rhel4.14.ia64.rpm

x86_64:
84443b21b382b568d96386c94b185df8  xscreensaver-4.18-5.rhel4.14.x86_64.rpm
7bd71f9028c883bc014bc55530be77a3  xscreensaver-debuginfo-4.18-5.rhel4.14.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-2007-1859
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2007 Red Hat, Inc.
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