Ubuntu: USN-1234-1 Critical Security Update for OpenJDK 11 DoS Flaw

Several vulnerabilities have been discovered in the OpenJDK Java runtime,
resulting in denial of service, incorrect implementation of Kerberos
GSSAPI and TGS requests or incorrect TLS handshakes.

For the oldstable distribution (stretch), these problems have been fixed
in version 8u242-b08-1~deb9u1.

We recommend that you upgrade your openjdk-8 packages.

For the detailed security status of openjdk-8 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/openjdk-8

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/