CVE-2021-30639

CVE-2021-30639

maven/tomcat/jasper-runtime

Improper Handling of Exceptional Conditions

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.

Version 8.5.64, version 9.0.44, all versions starting from 10.0.3 up to 10.0.4

Upgrade to version 8.5.65, 9.0.45, 10.0.5 or above.

2021-07-17