1. Ubuntu Security Notices
  2. USN-4892-1

USN-4892-1: OpenJDK vulnerability

Publication date

27 April 2021

Overview

OpenJDK’s security restriction could be bypassed when verifying Jar signatures.

Releases

Packages

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.

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

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.

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
20.10 groovy 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
20.04 focal 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
18.04 bionic 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
16.04 xenial 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

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References

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