CVE-2021-30639

A vulnerability in Apache Tomcat allows an attacker to remotely trigger a denial of service. An error introduced as part of a change to improve error handling during non-blocking I/O meant that the error flag associated with the Request object was not reset between requests. This meant that once a non-blocking I/O error occurred, all future requests handled by that request object would fail. Users were able to trigger non-blocking I/O errors, e.g. by dropping a connection, thereby creating the possibility of triggering a DoS. Applications that do not use non-blocking I/O are not exposed to this vulnerability. This issue affects Apache Tomcat 10.0.3 to 10.0.4; 9.0.44; 8.5.64.

• apache tomcat 8.5.64 • apache tomcat 9.0.44 • apache tomcat 10.0.3 • apache tomcat 10.0.4 • mcafee epolicy orchestrator (< 5.10.0) • mcafee epolicy orchestrator 5.10.0 • oracle big data spatial and graph (< 23.1)