RHSA-2011:0176 - Security Advisory

Topic

Updated java-1.6.0-openjdk packages that fix two security issues are now
available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

Description

These packages provide the OpenJDK 6 Java Runtime Environment and the
OpenJDK 6 Software Development Kit. The javaws command can be used to
launch Java Web Start applications.

A public static field declaration allowed untrusted JNLP (Java Network
Launching Protocol) applications to read privileged data. A remote attacker
could directly or indirectly read the values of restricted system
properties, such as "user.name", "user.home", and "java.home", which
untrusted applications should not be allowed to read. (CVE-2010-3860)

It was found that JNLPSecurityManager could silently return without
throwing an exception when permission was denied. If the javaws command was
used to launch a Java Web Start application that relies on this exception
being thrown, it could result in that application being run with elevated
privileges, allowing it to bypass security manager restrictions and gain
access to privileged functionality. (CVE-2010-4351)

Note: The RHSA-2010:0339 java-1.6.0-openjdk update installed javaws by
mistake. As part of the fixes for CVE-2010-3860 and CVE-2010-4351, this
update removes javaws.

Red Hat would like to thank the TippingPoint Zero Day Initiative project
for reporting CVE-2010-4351. The original issue reporter wishes to stay
anonymous.

This erratum also upgrades the OpenJDK package to IcedTea6 1.7.7. Refer to
the NEWS file, linked to in the References, for further information.

All users of java-1.6.0-openjdk are advised to upgrade to these updated
packages, which resolve these issues. All running instances of OpenJDK Java
must be restarted for the update to take effect.

Solution

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.6 i386
• Red Hat Enterprise Linux Server - AUS 5.6 x86_64
• Red Hat Enterprise Linux Server - AUS 5.6 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 5.6 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 5.6 i386

Fixes

• BZ - 645843 - CVE-2010-3860 IcedTea System property information leak via public static
• BZ - 663680 - CVE-2010-4351 IcedTea jnlp security manager bypass

CVEs

• CVE-2010-4351
• CVE-2010-3860

References

• https://access.redhat.com/security/updates/classification/#moderate
• http://icedtea.classpath.org/hg/release/icedtea6-1.7/file/af20d64bc8b9/NEWS