A tomcat8 security update has been released for Debian GNU/Linux 9 to address several vulnerabilities that can result in HTTP request smuggling.

DSA 4673-1: tomcat8 security update

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Debian Security Advisory DSA-4673-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
May 03, 2020   https://www.debian.org/security/faq
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Package : tomcat8
CVE ID : CVE-2019-17569 CVE-2020-1935 CVE-2020-1938

Several vulnerabilities were discovered in the Tomcat servlet and JSP
engine, which could result in HTTP request smuggling and code execution
in the AJP connector (disabled by default in Debian).

For the oldstable distribution (stretch), these problems have been fixed
in version 8.5.54-0+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/