Tomcat — контейнер сервлетов с открытым исходным кодом

If a web application sends a WebSocket message concurrently with the WebSocket connection closing when running on Apache Tomcat 8.5.0 to 8.5.75 or Apache Tomcat 9.0.0.M1 to 9.0.20, it is possible that the application will continue to use the socket after it has been closed. The error handling triggered in this case could cause the a pooled object to be placed in the pool twice. This could result in subsequent connections using the same object concurrently which could result in data being returned to the wrong use and/or other errors.

Improper Handling of Exceptional Conditions in Apache Tomcat

Improper Resource Shutdown or Release in Apache Tomcat

Expected Behavior Violation in Apache Tomcat

Exposure of Resource to Wrong Sphere in Apache Tomcat

The Tomcat package on Red Hat Enterprise Linux (RHEL) 7, Fedora, CentOS, Oracle Linux, and possibly other Linux distributions uses weak permissions for /usr/lib/tmpfiles.d/tomcat.conf, which allows local users to gain root privileges by leveraging membership in the tomcat group.

Improper Access Control in Apache Tomcat

Improper Input Validation in Apache Tomcat

Apache Tomcat Improper Access Control vulnerability

Apache Tomcat Unrestricted file upload vulnerability