Update the affected package openjdk-17 to the latest version. A remote non-authenticated attacker can exploit this vulnerability to manipulate data. The vulnerability exists due to improper input validation within the JGSS component in Oracle GraalVM Enterprise Edition. The vulnerability allows a remote non-authenticated attacker to manipulate data. OpenJDK 64-Bit Server VM (build 25.CWE-ID: CWE-20 - Improper input validation You get something like this: openjdk version '1.8.0_171'

Check with java -version and javac -version that version 8 is the default JDK.

Repeat the previous operation with default Javac:.

Enter ‘2’ to select the java-8-openjdk-amd64.

Pay attention to the asterisk before the numbers on the left and if the correct one is not set choose the correct one by typing the number of it and pressing enter. Press enter to keep the current choice, or type selection number: * 0 /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java 1071 auto modeġ /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java 1071 manual modeĢ /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1069 manual mode You get something like this: There are 2 choices for the alternative java (providing /usr/bin/java). You get something like this (in a 32-bit environment -i386 postfix instead of -amd64): java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-amd64

Check which JDK-Versions are available on your system perform:.

Sudo add-apt-repository ppa:openjdk-r/ppa

Add this repository to your system’s Software Sources:

Version 8 of OpenJDK is available for Ubuntu Trusty 14.04 from the PPA repository OpenJDK builds.

Openjdk ubuntu