RHSA-2011:0856 - Security Advisory

Topic

Updated java-1.6.0-openjdk packages that fix several security issues are
now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having critical
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.

Integer overflow flaws were found in the way Java2D parsed JPEG images and
user-supplied fonts. An attacker could use these flaws to execute arbitrary
code with the privileges of the user running an untrusted applet or
application. (CVE-2011-0862)

It was found that the MediaTracker implementation created Component
instances with unnecessary access privileges. A remote attacker could use
this flaw to elevate their privileges by utilizing an untrusted applet or
application that uses Swing. (CVE-2011-0871)

A flaw was found in the HotSpot component in OpenJDK. Certain bytecode
instructions confused the memory management within the Java Virtual Machine
(JVM), resulting in an applet or application crashing. (CVE-2011-0864)

An information leak flaw was found in the NetworkInterface class. An
untrusted applet or application could use this flaw to access information
about available network interfaces that should only be available to
privileged code. (CVE-2011-0867)

An incorrect float-to-long conversion, leading to an overflow, was found
in the way certain objects (such as images and text) were transformed in
Java2D. A remote attacker could use this flaw to crash an untrusted applet
or application that uses Java2D. (CVE-2011-0868)

It was found that untrusted applets and applications could misuse a SOAP
connection to incorrectly set global HTTP proxy settings instead of
setting them in a local scope. This flaw could be used to intercept HTTP
requests. (CVE-2011-0869)

A flaw was found in the way signed objects were deserialized. If trusted
and untrusted code were running in the same Java Virtual Machine (JVM), and
both were deserializing the same signed object, the untrusted code could
modify said object by using this flaw to bypass the validation checks on
signed objects. (CVE-2011-0865)

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
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.1 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.1 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.1 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.1 i386
• Red Hat Virtual Storage Appliance (from RHUI) 6.1 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386

Fixes

• BZ - 706106 - CVE-2011-0865 OpenJDK: Deserialization allows creation of mutable SignedObject (Deserialization, 6618658)
• BZ - 706139 - CVE-2011-0862 OpenJDK: integer overflows in JPEGImageReader and font SunLayoutEngine (2D, 7013519)
• BZ - 706153 - CVE-2011-0867 OpenJDK: NetworkInterface information leak (Networking, 7013969)
• BZ - 706234 - CVE-2011-0869 OpenJDK: unprivileged proxy settings change via SOAPConnection (SAAJ, 7013971)
• BZ - 706241 - CVE-2011-0868 OpenJDK: incorrect numeric type conversion in TransformHelper (2D, 7016495)
• BZ - 706245 - CVE-2011-0864 OpenJDK: JVM memory corruption via certain bytecode (HotSpot, 7020373)
• BZ - 706248 - CVE-2011-0871 OpenJDK: MediaTracker created Component instances with unnecessary privileges (Swing, 7020198)

CVEs

• CVE-2011-0869
• CVE-2011-0868
• CVE-2011-0865
• CVE-2011-0864
• CVE-2011-0867
• CVE-2011-0862
• CVE-2011-0871

References

• https://access.redhat.com/security/updates/classification/#critical
• http://www.oracle.com/technetwork/topics/security/javacpujune2011-313339.html