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Ubuntu 23.10 USN-6662-1 Critical: OpenJDK 21 Denial of Service

ubuntu
Calendar Grey February 27, 2024
Dist Ubuntu Esm H88
Ubuntu 20.04, 22.04, and 23.10 have received security updates that address significant vulnerabilities found in OpenJDK 21, ensuring better protection for Java applications.
Several security issues were fixed in OpenJDK 21.

Summary

Several security issues were fixed in OpenJDK 21.

Software Description:

- openjdk-21: Open Source Java implementation

Details:

Yi Yang discovered that the Hotspot component of OpenJDK 21 incorrectly

handled array accesses in the C1 compiler. An attacker could possibly

use this issue to cause a denial of service, execute arbitrary code or

bypass Java sandbox restrictions. (CVE-2024-20918)

It was discovered that the Hotspot component of OpenJDK 21 did not

properly verify bytecode in certain situations. An attacker could

possibly use this issue to bypass Java sandbox restrictions.

(CVE-2024-20919)

It was discovered that the Hotspot component of OpenJDK 21 had an

optimization flaw when generating range check loop predicates. An attacker

could possibly use this issue to cause a denial of service, execute

arbitrary code or bypass Java sandbox restrictions. (CVE-2024-20921)

It was discovered that OpenJDK 21 could produce debug logs that contained

private keys...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu java sandbox bypass openjdk-21

Update Instructions

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

Ubuntu 23.10:
   openjdk-21-jdk                  21.0.2+13-1~23.10.1
   openjdk-21-jdk-headless         21.0.2+13-1~23.10.1
   openjdk-21-jre                  21.0.2+13-1~23.10.1
   openjdk-21-jre-headless         21.0.2+13-1~23.10.1
   openjdk-21-jre-zero             21.0.2+13-1~23.10.1

Ubuntu 22.04 LTS:
   openjdk-21-jdk                  21.0.2+13-1~22.04.1
   openjdk-21-jdk-headless         21.0.2+13-1~22.04.1
   openjdk-21-jre                  21.0.2+13-1~22.04.1
   openjdk-21-jre-headless         21.0.2+13-1~22.04.1
   openjdk-21-jre-zero             21.0.2+13-1~22.04.1

Ubuntu 20.04 LTS:
   openjdk-21-jdk                  21.0.2+13-1~20.04.1
   openjdk-21-jdk-headless         21.0.2+13-1~20.04.1
   openjdk-21-jre                  21.0.2+13-1~20.04.1
   openjdk-21-jre-headless         21.0.2+13-1~20.04.1
   openjdk-21-jre-zero             21.0.2+13-1~20.04.1

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

References

https://ubuntu.com/security/notices/USN-6662-1

CVE-2024-20918, CVE-2024-20919, CVE-2024-20921, CVE-2024-20945,

CVE-2024-20952

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6662-1

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu java sandbox bypass openjdk-21

Package Information

https://launchpad.net/ubuntu/+source/openjdk-21/21.0.2+13-1~23.10.1
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.2+13-1~22.04.1
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.2+13-1~20.04.1

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