==========================================================================
Ubuntu Security Notice USN-7531-1
May 26, 2025

openjdk-21-crac vulnerabilities
==========================================================================

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

- Ubuntu 25.04
- Ubuntu 24.10

Summary:

Several security issues were fixed in CRaC JDK 21.

Software Description:
- openjdk-21-crac: Open Source Java implementation with Coordinated Restore at Checkpoints

Details:

Alicja Kario discovered that the JSSE component of CRaC JDK 21 incorrectly
handled RSA padding. An Attacker could possibly use this issue to obtain
sensitive information. (CVE-2025-21587)

It was discovered that the Compiler component of CRaC JDK 21 incorrectly
handled compiler transformations. An attacker could possibly use this
issue to cause a denial of service or execute arbitrary code.
(CVE-2025-30691)

It was discovered that the 2D component of CRaC JDK 21 did not properly
manage memory under certain circumstances. An attacker could possibly use
this issue to cause a denial of service or execute arbitrary code.
(CVE-2025-30698)

In addition to security fixes, the updated packages contain bug fixes, new
features, and possibly incompatible changes.

Please see the following for more information:
https://openjdk.org/groups/vulnerability/advisories/2025-04-15

Update instructions:

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

Ubuntu 25.04
  openjdk-21-crac-jdk             21.0.7+6.1-0ubuntu1~25.04
  openjdk-21-crac-jdk-headless    21.0.7+6.1-0ubuntu1~25.04
  openjdk-21-crac-jre             21.0.7+6.1-0ubuntu1~25.04
  openjdk-21-crac-jre-headless    21.0.7+6.1-0ubuntu1~25.04
  openjdk-21-crac-jre-zero        21.0.7+6.1-0ubuntu1~25.04

Ubuntu 24.10
  openjdk-21-crac-jdk             21.0.7+6.1-0ubuntu1~24.10
  openjdk-21-crac-jdk-headless    21.0.7+6.1-0ubuntu1~24.10
  openjdk-21-crac-jre             21.0.7+6.1-0ubuntu1~24.10
  openjdk-21-crac-jre-headless    21.0.7+6.1-0ubuntu1~24.10
  openjdk-21-crac-jre-zero        21.0.7+6.1-0ubuntu1~24.10

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-7531-1
  CVE-2025-21587, CVE-2025-30691, CVE-2025-30698

Package Information:
  https://launchpad.net/ubuntu/+source/openjdk-21-crac/21.0.7+6.1-0ubuntu1~25.04
  https://launchpad.net/ubuntu/+source/openjdk-21-crac/21.0.7+6.1-0ubuntu1~24.10