[USN-7254-1] OpenJDK 21 vulnerability

[Evan Caville]

==========================================================================
Ubuntu Security Notice USN-7254-1
February 05, 2025

openjdk-21 vulnerability
==========================================================================

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

- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

OpenJDK 21 could be made to expose sensitive information over the
network.

Software Description:
- openjdk-21: Open Source Java implementation

Details:

It was discovered that the Hotspot component of OpenJDK 21 did not properly
handle API access under certain circumstances. An unauthenticated attacker
could possibly use this issue to access unauthorized resources and expose
sensitive information.

Update instructions:

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

Ubuntu 24.10
   openjdk-21-jdk                  21.0.6+7-1~24.10.1
   openjdk-21-jdk-headless         21.0.6+7-1~24.10.1
   openjdk-21-jre                  21.0.6+7-1~24.10.1
   openjdk-21-jre-headless         21.0.6+7-1~24.10.1
   openjdk-21-jre-zero             21.0.6+7-1~24.10.1

Ubuntu 24.04 LTS
   openjdk-21-jdk                  21.0.6+7-1~24.04.1
   openjdk-21-jdk-headless         21.0.6+7-1~24.04.1
   openjdk-21-jre                  21.0.6+7-1~24.04.1
   openjdk-21-jre-headless         21.0.6+7-1~24.04.1
   openjdk-21-jre-zero             21.0.6+7-1~24.04.1

Ubuntu 22.04 LTS
   openjdk-21-jdk                  21.0.6+7-1~22.04.1
   openjdk-21-jdk-headless         21.0.6+7-1~22.04.1
   openjdk-21-jre                  21.0.6+7-1~22.04.1
   openjdk-21-jre-headless         21.0.6+7-1~22.04.1
   openjdk-21-jre-zero             21.0.6+7-1~22.04.1

Ubuntu 20.04 LTS
   openjdk-21-jdk                  21.0.6+7-1~20.04.1
   openjdk-21-jdk-headless         21.0.6+7-1~20.04.1
   openjdk-21-jre                  21.0.6+7-1~20.04.1
   openjdk-21-jre-headless         21.0.6+7-1~20.04.1
   openjdk-21-jre-zero             21.0.6+7-1~20.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart Java
applications to make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-7254-1
   CVE-2025-21502

Package Information:
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.6+7-1~24.10.1
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.6+7-1~24.04.1
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.6+7-1~22.04.1
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.6+7-1~20.04.1

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