A tomcat8 security update has been released for Debian GNU/Linux 8 Extended LTS to address a denial of service issue.

DLA 2764-1: tomcat8 security update

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Debian LTS Advisory DLA-2764-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Markus Koschany
September 22, 2021   https://wiki.debian.org/LTS
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Package : tomcat8
Version : 8.5.54-0+deb9u8
CVE ID : CVE-2021-41079

Apache Tomcat did not properly validate incoming TLS packets. When Tomcat
was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially
crafted packet could be used to trigger an infinite loop resulting in a
denial of service.

For Debian 9 stretch, this problem has been fixed in version
8.5.54-0+deb9u8.

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 LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS