This update for tomcat to version 9.0.20 fixes the following issues:
Security issues fixed:
- CVE-2019-0199: Fixed a denial of service in the HTTP/2 implementation related to
streams with excessive numbers of SETTINGS frames (bsc#1131055).
- CVE-2019-0221: Fixed a cross site scripting vulnerability with the SSI printenv command (bsc#1136085).
Non-security issues fixed:
- Increase maximum number of threads and open files for tomcat (bsc#1111966).