openjdk-8 vulnerabilities

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

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

* CVE-2020-14556
* CVE-2020-14577
* CVE-2020-14578
* CVE-2020-14579
* CVE-2020-14581
* CVE-2020-14583
* CVE-2020-14593
* CVE-2020-14621

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