A tomcat9 security update has been released for Debian GNU/Linux 10 and 11 to address two vulnerabilities.

DSA 4984-1: tomcat9 security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4984-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
October 14, 2021   https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : tomcat9
CVE ID : CVE-2021-30640 CVE-2021-41079

Two vulnerabilities were discovered in the Tomcat servlet and JSP engine,
which could result in denial of service.

For the oldstable distribution (buster), these problems have been fixed
in version 9.0.31-1~deb10u6.

For the stable distribution (bullseye), these problems have been fixed in
version 9.0.43-2~deb11u2.

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/tomcat9

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/