A tomcat8 security update has been released for Debian GNU/Linux 9. Several issues were discovered in the Tomcat servlet and JSP engine, which could result in session fixation attacks, information disclosure, cross- site scripting, denial of service via resource exhaustion and insecure redirects.

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Debian Security Advisory DSA-4596-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
December 27, 2019   https://www.debian.org/security/faq
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Package : tomcat8
CVE ID : CVE-2018-8014 CVE-2018-11784 CVE-2019-0199 CVE-2019-0221
CVE-2019-12418 CVE-2019-17563

Several issues were discovered in the Tomcat servlet and JSP engine, which
could result in session fixation attacks, information disclosure, cross-
site scripting, denial of service via resource exhaustion and insecure
redirects.

For the oldstable distribution (stretch), these problems have been fixed
in version 8.5.50-0+deb9u1. This update also requires an updated version
of tomcat-native which has been updated to 1.2.21-1~deb9u1.

We recommend that you upgrade your tomcat8 packages.

For the detailed security status of tomcat8 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/tomcat8

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/