A Tomcat security update is available for Ubuntu Linux 16.04 LTS.

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Ubuntu Security Notice USN-4251-1
January 27, 2020

tomcat8 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Tomcat.

Software Description:
- tomcat8: Servlet and JSP engine

Details:

It was discovered that Tomcat incorrectly handled the RMI registry when
configured with the JMX Remote Lifecycle Listener. A local attacker could
possibly use this issue to obtain credentials and gain complete control
over the Tomcat instance. (CVE-2019-12418)

It was discovered that Tomcat incorrectly handled FORM authentication. A
remote attacker could possibly use this issue to perform a session fixation
attack. (CVE-2019-17563)

Update instructions:

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

Ubuntu 16.04 LTS:
libtomcat8-java 8.0.32-1ubuntu1.11
tomcat8 8.0.32-1ubuntu1.11

In general, a standard system update will make all the necessary changes.

References:
  https://usn.ubuntu.com/4251-1
CVE-2019-12418, CVE-2019-17563

Package Information:
  https://launchpad.net/ubuntu/+source/tomcat8/8.0.32-1ubuntu1.11