USN-7339-1: CRaC JDK 21 vulnerabilities

Releases

• Ubuntu 24.10

Packages

• openjdk-21-crac - Open Source Java implementation with Coordinated Restore at Checkpoints

Details

Andy Boothe discovered that the Networking component of CRaC JDK 21 did not
properly handle access under certain circumstances. An unauthenticated
attacker could possibly use this issue to cause a denial of service.
(CVE-2024-21208)

It was discovered that the Hotspot component of CRaC JDK 21 did not
properly handle vectorization under certain circumstances. An
unauthenticated attacker could possibly use this issue to access
unauthorized resources and expose sensitive information.
(CVE-2024-21210, CVE-2024-21235)

It was discovered that the Serialization component of CRaC JDK 21 did not
properly handle deserialization under certain circumstances. An
unauthenticated attacker could possibly use this issue to cause a denial
of service. (CVE-2024-21217)

It was discovered that the Hotspot component of CRaC JDK 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. (CVE-2025-21502)

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/2024-10-15
https://openjdk.org/groups/vulnerability/advisories/2025-01-21

Update instructions

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

Ubuntu 24.10

• openjdk-21-crac-jdk - 21.0.6+7-0ubuntu1~24.10
• openjdk-21-crac-jdk-headless - 21.0.6+7-0ubuntu1~24.10
• openjdk-21-crac-jre - 21.0.6+7-0ubuntu1~24.10
• openjdk-21-crac-jre-headless - 21.0.6+7-0ubuntu1~24.10
• openjdk-21-crac-jre-zero - 21.0.6+7-0ubuntu1~24.10

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

• CVE-2024-21235
• CVE-2024-21208
• CVE-2024-21210
• CVE-2025-21502
• CVE-2024-21217

Related notices

• USN-7096-1
• USN-7097-1
• USN-7098-1
• USN-7099-1
• USN-7124-1
• USN-7338-1
• USN-7252-1
• USN-7253-1
• USN-7254-1
• USN-7255-1