https://lwn.net/Articles/337422/
Ubuntu alert USN-788-1 (tomcat6) [LWN.net]
ubuntualertusn7881
https://www.suse.com/pt-br/support/update/announcement/2020/suse-su-202014375-1/
Security update for tomcat6 SUSE-SU-2020:14375-1 | SUSE Support | SUSE
Announcement of Security update for tomcat6. Maximize the value of open source with SUSE solution, backed by SUSE Support.
security updatetomcat6suse202014375
https://lwn.net/Articles/466811/
Fedora alert FEDORA-2011-15005 (tomcat6) [LWN.net]
fedoraalert201115005tomcat6