=========================================================================
Ubuntu Security Notice USN-4892-1
April 27, 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's security restriction could be bypassed when verifying Jar
signatures.

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

Details:

It was discovered that OpenJDK incorrectly verified Jar signatures. An
attacker could possibly use this issue to bypass intended security
restrictions when using Jar files signed with a disabled algorithm.

Update instructions:

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

Ubuntu 20.10:
  openjdk-11-jdk                  11.0.11+9-0ubuntu2~20.10
  openjdk-11-jre                  11.0.11+9-0ubuntu2~20.10
  openjdk-11-jre-headless         11.0.11+9-0ubuntu2~20.10
  openjdk-11-jre-zero             11.0.11+9-0ubuntu2~20.10
  openjdk-8-jdk                   8u292-b10-0ubuntu1~20.10
  openjdk-8-jre                   8u292-b10-0ubuntu1~20.10
  openjdk-8-jre-headless          8u292-b10-0ubuntu1~20.10
  openjdk-8-jre-zero              8u292-b10-0ubuntu1~20.10

Ubuntu 20.04 LTS:
  openjdk-11-jdk                  11.0.11+9-0ubuntu2~20.04
  openjdk-11-jre                  11.0.11+9-0ubuntu2~20.04
  openjdk-11-jre-headless         11.0.11+9-0ubuntu2~20.04
  openjdk-11-jre-zero             11.0.11+9-0ubuntu2~20.04
  openjdk-8-jdk                   8u292-b10-0ubuntu1~20.04
  openjdk-8-jre                   8u292-b10-0ubuntu1~20.04
  openjdk-8-jre-headless          8u292-b10-0ubuntu1~20.04
  openjdk-8-jre-zero              8u292-b10-0ubuntu1~20.04

Ubuntu 18.04 LTS:
  openjdk-11-jdk                  11.0.11+9-0ubuntu2~18.04
  openjdk-11-jre                  11.0.11+9-0ubuntu2~18.04
  openjdk-11-jre-headless         11.0.11+9-0ubuntu2~18.04
  openjdk-11-jre-zero             11.0.11+9-0ubuntu2~18.04
  openjdk-8-jdk                   8u292-b10-0ubuntu1~18.04
  openjdk-8-jre                   8u292-b10-0ubuntu1~18.04
  openjdk-8-jre-headless          8u292-b10-0ubuntu1~18.04
  openjdk-8-jre-zero              8u292-b10-0ubuntu1~18.04

Ubuntu 16.04 LTS:
  openjdk-8-jdk                   8u292-b10-0ubuntu1~16.04.1
  openjdk-8-jre                   8u292-b10-0ubuntu1~16.04.1
  openjdk-8-jre-headless          8u292-b10-0ubuntu1~16.04.1
  openjdk-8-jre-zero              8u292-b10-0ubuntu1~16.04.1

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://ubuntu.com/security/notices/USN-4892-1
  CVE-2021-2163

Package Information:
  https://launchpad.net/ubuntu/+source/openjdk-8/8u292-b10-0ubuntu1~20.10
  https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.11+9-0ubuntu2~20.10
  https://launchpad.net/ubuntu/+source/openjdk-8/8u292-b10-0ubuntu1~20.04
  https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.11+9-0ubuntu2~20.04
  https://launchpad.net/ubuntu/+source/openjdk-8/8u292-b10-0ubuntu1~18.04
  https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.11+9-0ubuntu2~18.04
  https://launchpad.net/ubuntu/+source/openjdk-8/8u292-b10-0ubuntu1~16.04.1