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.
The product does not handle or incorrectly handles an exceptional condition.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tomcat | Apache | 8.5.64 (including) | 8.5.64 (including) |
| Tomcat | Apache | 9.0.44 (including) | 9.0.44 (including) |
| Tomcat | Apache | 10.0.3 (including) | 10.0.3 (including) |
| Tomcat | Apache | 10.0.4 (including) | 10.0.4 (including) |
| Tomcat6 | Ubuntu | trusty | * |
| Tomcat6 | Ubuntu | trusty/esm | * |
| Tomcat6 | Ubuntu | xenial | * |
| Tomcat7 | Ubuntu | bionic | * |
| Tomcat7 | Ubuntu | trusty | * |
| Tomcat7 | Ubuntu | trusty/esm | * |
| Tomcat7 | Ubuntu | xenial | * |
| Tomcat8 | Ubuntu | bionic | * |
| Tomcat8 | Ubuntu | xenial | * |
| Tomcat9 | Ubuntu | bionic | * |
| Tomcat9 | Ubuntu | groovy | * |
| Tomcat9 | Ubuntu | hirsute | * |
| Tomcat9 | Ubuntu | impish | * |
| Tomcat9 | Ubuntu | kinetic | * |
| Tomcat9 | Ubuntu | lunar | * |
| Tomcat9 | Ubuntu | mantic | * |