Operating System:

[Ubuntu]

Published:

10 February 2021

Protect yourself against future threats.

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0453
                     USN-4726-1: OpenJDK vulnerability
                             10 February 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           OpenJDK
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Unknown/Unspecified
Resolution:        Patch/Upgrade

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4726-1

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USN-4726-1: OpenJDK vulnerability
09 February 2021

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

  o Ubuntu 20.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Packages

  o openjdk-8 - Open Source Java implementation
  o 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

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

Ubuntu 20.04

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

Ubuntu 18.04

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

Ubuntu 16.04

  o openjdk-8-jdk - 8u282-b08-0ubuntu1~16.04
  o openjdk-8-jre - 8u282-b08-0ubuntu1~16.04
  o openjdk-8-jre-headless - 8u282-b08-0ubuntu1~16.04
  o openjdk-8-jre-jamvm - 8u282-b08-0ubuntu1~16.04
  o 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

  o https://launchpad.net/bugs/1914824

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