A JUnit 4 security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, 20.04 LTS, and 20.10.

USN-4731-1: JUnit 4 vulnerability

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Ubuntu Security Notice USN-4731-1
February 10, 2021

junit4 vulnerability
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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:

The system could be made to expose sensitive information.

Software Description:
- junit4: Simple framework to write repeatable tests

Details:

It was discovered that JUnit 4 contains a local information disclosure
vulnerability. An attacker could possibly use this issue to obtain sensitive
information.

Update instructions:

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

Ubuntu 20.10:
junit4 4.12-8ubuntu0.20.10.1
junit4-doc 4.12-8ubuntu0.20.10.1

Ubuntu 20.04 LTS:
junit4 4.12-8ubuntu0.20.04.1
junit4-doc 4.12-8ubuntu0.20.04.1

Ubuntu 18.04 LTS:
junit4 4.12-8~18.04.1
junit4-doc 4.12-8~18.04.1

Ubuntu 16.04 LTS:
junit4 4.12-4ubuntu1.1
junit4-doc 4.12-4ubuntu1.1

In general, a standard system update will make all the necessary changes.

References:
  https://usn.ubuntu.com/4731-1
CVE-2020-15250

Package Information:
  https://launchpad.net/ubuntu/+source/junit4/4.12-8ubuntu0.20.10.1
  https://launchpad.net/ubuntu/+source/junit4/4.12-8ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/junit4/4.12-8~18.04.1
  https://launchpad.net/ubuntu/+source/junit4/4.12-4ubuntu1.1