java security update

CentOS Errata and Security Advisory CESA-2016:2658

The java-1.7.0-openjdk packages provide the OpenJDK 7 Java Runtime Environment
and the OpenJDK 7 Java Software Development Kit.

Security Fix(es):

• It was discovered that the Hotspot component of OpenJDK did not properly check
  arguments of the System.arraycopy() function in certain cases. An untrusted Java
  application or applet could use this flaw to corrupt virtual machine’s memory
  and completely bypass Java sandbox restrictions. (CVE-2016-5582)

• It was discovered that the Hotspot component of OpenJDK did not properly check
  received Java Debug Wire Protocol (JDWP) packets. An attacker could possibly use
  this flaw to send debugging commands to a Java program running with debugging
  enabled if they could make victim’s browser send HTTP requests to the JDWP port
  of the debugged application. (CVE-2016-5573)

• It was discovered that the Libraries component of OpenJDK did not restrict the
  set of algorithms used for Jar integrity verification. This flaw could allow an
  attacker to modify content of the Jar file that used weak signing key or hash
  algorithm. (CVE-2016-5542)

Note: After this update, MD2 hash algorithm and RSA keys with less than 1024
bits are no longer allowed to be used for Jar integrity verification by default.
MD5 hash algorithm is expected to be disabled by default in the future updates.
A newly introduced security property jdk.jar.disabledAlgorithms can be used to
control the set of disabled algorithms.

• A flaw was found in the way the JMX component of OpenJDK handled classloaders.
  An untrusted Java application or applet could use this flaw to bypass certain
  Java sandbox restrictions. (CVE-2016-5554)

• A flaw was found in the way the Networking component of OpenJDK handled HTTP
  proxy authentication. A Java application could possibly expose HTTPS server
  authentication credentials via a plain text network connection to an HTTP proxy
  if proxy asked for authentication. (CVE-2016-5597)

Note: After this update, Basic HTTP proxy authentication can no longer be used
when tunneling HTTPS connection through an HTTP proxy. Newly introduced system
properties jdk.http.auth.proxying.disabledSchemes and
jdk.http.auth.tunneling.disabledSchemes can be used to control which
authentication schemes can be requested by an HTTP proxy when proxying HTTP and
HTTPS connections respectively.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2016-November/084302.html
https://lists.centos.org/pipermail/centos-announce/2016-November/084320.html
https://lists.centos.org/pipermail/centos-cr-announce/2016-November/029948.html

Affected packages:
java-1.7.0-openjdk
java-1.7.0-openjdk-accessibility
java-1.7.0-openjdk-demo
java-1.7.0-openjdk-devel
java-1.7.0-openjdk-headless
java-1.7.0-openjdk-javadoc
java-1.7.0-openjdk-src

Upstream details at:
https://access.redhat.com/errata/RHSA-2016:2658