An OpenJDK 8 security update has been released for Ubuntu Linux 20.04 LTS, 18.04 LTS, and 16.04 LTS.

USN-4453-1: OpenJDK 8 vulnerabilities

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Ubuntu Security Notice USN-4453-1
August 05, 2020

openjdk-8 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in OpenJDK 8.

Software Description:
- openjdk-8: Open Source Java implementation

Details:

Johannes Kuhn discovered that OpenJDK 8 incorrectly handled access control
contexts. An attacker could possibly use this issue to execute arbitrary
code. (CVE-2020-14556)

Philippe Arteau discovered that OpenJDK 8 incorrectly verified names in
TLS server's X.509 certificates. An attacker could possibly use this
issue to obtain sensitive information. (CVE-2020-14577)

It was discovered that OpenJDK 8 incorrectly handled exceptions in
DerInputStream class and in the DerValue.equals() method. An attacker
could possibly use this issue to cause a denial of service.
(CVE-2020-14578, CVE-2020-14579)

It was discovered that OpenJDK 8 incorrectly handled image files. An
attacker could possibly use this issue to obtain sensitive information.
(CVE-2020-14581)

Markus Loewe discovered that OpenJDK 8 incorrectly handled concurrent
access in java.nio.Buffer class. An attacker could use this issue to
bypass sandbox restrictions.
(CVE-2020-14583)

It was discovered that OpenJDK 8 incorrectly handled transformation of
images. An attacker could possibly use this issue to bypass sandbox
restrictions and insert, edit or obtain sensitive information.
(CVE-2020-14593)

Roman Shemyakin discovered that OpenJDK 8 incorrectly handled XML files.
An attacker could possibly use this issue to insert, edit or obtain
sensitive information. (CVE-2020-14621)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
openjdk-8-jdk 8u265-b01-0ubuntu2~20.04
openjdk-8-jre 8u265-b01-0ubuntu2~20.04
openjdk-8-jre-headless 8u265-b01-0ubuntu2~20.04
openjdk-8-jre-zero 8u265-b01-0ubuntu2~20.04

Ubuntu 18.04 LTS:
openjdk-8-jdk 8u265-b01-0ubuntu2~18.04
openjdk-8-jre 8u265-b01-0ubuntu2~18.04
openjdk-8-jre-headless 8u265-b01-0ubuntu2~18.04
openjdk-8-jre-zero 8u265-b01-0ubuntu2~18.04

Ubuntu 16.04 LTS:
openjdk-8-jdk 8u265-b01-0ubuntu2~16.04
openjdk-8-jre 8u265-b01-0ubuntu2~16.04
openjdk-8-jre-headless 8u265-b01-0ubuntu2~16.04
openjdk-8-jre-jamvm 8u265-b01-0ubuntu2~16.04
openjdk-8-jre-zero 8u265-b01-0ubuntu2~16.04

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any Java
applications or applets to make all the necessary changes.

References:
  https://usn.ubuntu.com/4453-1
CVE-2020-14556, CVE-2020-14577, CVE-2020-14578, CVE-2020-14579,
CVE-2020-14581, CVE-2020-14583, CVE-2020-14593, CVE-2020-14621

Package Information:
  https://launchpad.net/ubuntu/+source/openjdk-8/8u265-b01-0ubuntu2~20.04
  https://launchpad.net/ubuntu/+source/openjdk-8/8u265-b01-0ubuntu2~18.04
  https://launchpad.net/ubuntu/+source/openjdk-8/8u265-b01-0ubuntu2~16.04