RHSA-2007:0322 - Security Advisory

Topic

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.

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.

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

Affected Products

• Red Hat Enterprise Linux Server 4 x86_64
• Red Hat Enterprise Linux Server 4 ia64
• Red Hat Enterprise Linux Server 4 i386
• Red Hat Enterprise Linux Server 3 x86_64
• Red Hat Enterprise Linux Server 3 ia64
• Red Hat Enterprise Linux Server 3 i386
• Red Hat Enterprise Linux Server 2 ia64
• Red Hat Enterprise Linux Server 2 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.5 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.5 ia64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.5 i386
• Red Hat Enterprise Linux Workstation 4 x86_64
• Red Hat Enterprise Linux Workstation 4 ia64
• Red Hat Enterprise Linux Workstation 4 i386
• Red Hat Enterprise Linux Workstation 3 x86_64
• Red Hat Enterprise Linux Workstation 3 ia64
• Red Hat Enterprise Linux Workstation 3 i386
• Red Hat Enterprise Linux Workstation 2 ia64
• Red Hat Enterprise Linux Workstation 2 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux Desktop 3 x86_64
• Red Hat Enterprise Linux Desktop 3 i386
• Red Hat Enterprise Linux for IBM z Systems 4 s390x
• Red Hat Enterprise Linux for IBM z Systems 4 s390
• Red Hat Enterprise Linux for IBM z Systems 3 s390x
• Red Hat Enterprise Linux for IBM z Systems 3 s390
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.5 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc
• Red Hat Enterprise Linux for Power, big endian 3 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 4.5 ppc

Fixes

• BZ - 237003 - CVE-2007-1859 xscreensaver authentication bypass

CVEs

• CVE-2007-1859

References

• http://www.redhat.com/security/updates/classification/#moderate