A tomcat8 security update has been released for Debian GNU/Linux 10 to address an issue where excessive number of concurrent streams could have resulted in users seeing responses for unexpected resources.

DLA 2407-1: tomcat8 security update

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Debian LTS Advisory DLA-2407-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Chris Lamb
October 14, 2020   https://wiki.debian.org/LTS
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Package : tomcat8
Version : 8.5.54-0+deb9u4
CVE ID : CVE-2020-13943

It was discovered that there was an issue in Apache Tomcat 8, the
Java application server. An excessive number of concurrent streams
could have resulted in users seeing responses for unexpected
resources.

For Debian 9 "Stretch", this problem has been fixed in version
8.5.54-0+deb9u4.

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