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Ubuntu Security Notice USN-4726-1

Ubuntu Security Notice USN-4726-1
Posted Feb 9, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4726-1 - It was discovered that OpenJDK incorrectly handled the direct buffering of characters. An attacker could use this issue to cause OpenJDK to crash, resulting in a denial of service, or cause other unspecified impact.

tags | advisory, denial of service
systems | linux, ubuntu
MD5 | 9269af3f5b9fdc2b7137a29839104a51

Ubuntu Security Notice USN-4726-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4726-1
February 09, 2021

openjdk-8, openjdk-lts vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

OpenJDK could be made to crash if it received specially crafted
input.

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

Details:

It was discovered that OpenJDK incorrectly handled the direct buffering of
characters. An attacker could use this issue to cause OpenJDK to crash,
resulting in a denial of service, or cause other unspecified impact.

Update instructions:

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

Ubuntu 20.10:
openjdk-11-jdk 11.0.10+9-0ubuntu1~20.10
openjdk-11-jre 11.0.10+9-0ubuntu1~20.10
openjdk-11-jre-headless 11.0.10+9-0ubuntu1~20.10
openjdk-11-jre-zero 11.0.10+9-0ubuntu1~20.10
openjdk-8-jdk 8u282-b08-0ubuntu1~20.10
openjdk-8-jre 8u282-b08-0ubuntu1~20.10
openjdk-8-jre-headless 8u282-b08-0ubuntu1~20.10
openjdk-8-jre-zero 8u282-b08-0ubuntu1~20.10

Ubuntu 20.04 LTS:
openjdk-11-jdk 11.0.10+9-0ubuntu1~20.04
openjdk-11-jre 11.0.10+9-0ubuntu1~20.04
openjdk-11-jre-headless 11.0.10+9-0ubuntu1~20.04
openjdk-11-jre-zero 11.0.10+9-0ubuntu1~20.04
openjdk-8-jdk 8u282-b08-0ubuntu1~20.04
openjdk-8-jre 8u282-b08-0ubuntu1~20.04
openjdk-8-jre-headless 8u282-b08-0ubuntu1~20.04
openjdk-8-jre-zero 8u282-b08-0ubuntu1~20.04

Ubuntu 18.04 LTS:
openjdk-11-jdk 11.0.10+9-0ubuntu1~18.04
openjdk-11-jre 11.0.10+9-0ubuntu1~18.04
openjdk-11-jre-headless 11.0.10+9-0ubuntu1~18.04
openjdk-11-jre-zero 11.0.10+9-0ubuntu1~18.04
openjdk-8-jdk 8u282-b08-0ubuntu1~18.04
openjdk-8-jre 8u282-b08-0ubuntu1~18.04
openjdk-8-jre-headless 8u282-b08-0ubuntu1~18.04
openjdk-8-jre-zero 8u282-b08-0ubuntu1~18.04

Ubuntu 16.04 LTS:
openjdk-8-jdk 8u282-b08-0ubuntu1~16.04
openjdk-8-jre 8u282-b08-0ubuntu1~16.04
openjdk-8-jre-headless 8u282-b08-0ubuntu1~16.04
openjdk-8-jre-jamvm 8u282-b08-0ubuntu1~16.04
openjdk-8-jre-zero 8u282-b08-0ubuntu1~16.04

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/4726-1
https://launchpad.net/bugs/1914824

Package Information:
https://launchpad.net/ubuntu/+source/openjdk-8/8u282-b08-0ubuntu1~20.10
https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.10+9-0ubuntu1~20.10
https://launchpad.net/ubuntu/+source/openjdk-8/8u282-b08-0ubuntu1~20.04
https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.10+9-0ubuntu1~20.04
https://launchpad.net/ubuntu/+source/openjdk-8/8u282-b08-0ubuntu1~18.04
https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.10+9-0ubuntu1~18.04
https://launchpad.net/ubuntu/+source/openjdk-8/8u282-b08-0ubuntu1~16.04
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