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USN-6077-1: OpenJDK vulnerabilities

16 May 2023

Several security issues were fixed in OpenJDK.

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Packages

Details

Ben Smyth discovered that OpenJDK incorrectly handled half-duplex
connections during TLS handshake. A remote attacker could possibly use
this issue to insert, edit or obtain sensitive information.
(CVE-2023-21930)

It was discovered that OpenJDK incorrectly handled certain inputs. An
attacker could possibly use this issue to insert, edit or obtain sensitive
information. (CVE-2023-21937)

It was discovered that OpenJDK incorrectly handled command arguments. An
attacker could possibly use this issue to insert, edit or obtain sensitive
information. (CVE-2023-21938)

It was discovered that OpenJDK incorrectly validated HTML documents. An
attacker could possibly use this issue to insert, edit or obtain sensitive
information. (CVE-2023-21939)

Ramki Ramakrishna discovered that OpenJDK incorrectly handled garbage
collection. An attacker could possibly use this issue to bypass Java
sandbox restrictions. (CVE-2023-21954)

Jonathan Looney discovered that OpenJDK incorrectly handled certificate
chains during TLS session negotiation. A remote attacker could possibly
use this issue to cause a denial of service. (CVE-2023-21967)

Adam Reziouk discovered that OpenJDK incorrectly sanitized URIs. An
attacker could possibly use this issue to bypass Java sandbox
restrictions. (CVE-2023-21968)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 23.04
Ubuntu 22.10
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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

References

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Further reading