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Ubuntu Security Notice USN-3949-1
April 16, 2019

openjdk-lts vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

Java applets or applications could be made to expose sensitive
information.

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

Details:

It was discovered that a memory disclosure issue existed in the OpenJDK
Library subsystem. An attacker could use this to expose sensitive
information and possibly bypass Java sandbox restrictions. (CVE-2019-2422)

Please note that with this update, the OpenJDK package in Ubuntu
18.04 LTS has transitioned from OpenJDK 10 to OpenJDK 11. Several
additional packages were updated to be compatible with OpenJDK 11.

Update instructions:

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

Ubuntu 18.04 LTS:
  openjdk-11-jdk                  11.0.2+9-3ubuntu1~18.04.3
  openjdk-11-jre                  11.0.2+9-3ubuntu1~18.04.3

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:
  https://usn.ubuntu.com/usn/usn-3949-1
  CVE-2019-2422

Package Information:
  https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.2+9-3ubuntu1~18.04.3