Debian 10: DLA-3707-1 critical: Apache Tomcat 9 request smuggling

An Improper Input Validation vulnerability was present.
and Tomcat did not correctly parse HTTP trailer headers.
A trailer header that exceeded the header size limit could cause
Tomcat to treat a single request as multiple requests leading to
the possibility of request smuggling when behind a reverse proxy.

For Debian 10 buster, this problem has been fixed in version
9.0.31-1~deb10u11.

We recommend that you upgrade your tomcat9 packages.

For the detailed security status of tomcat9 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/tomcat9

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