CVE-2021-30639
published 2021-07-12CVE-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…
high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
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.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | tomcat | — | — |
| apache | tomcat | — | — |
| apache | tomcat | — | — |
| apache | tomcat | — | — |
| apache | tomcat | — | — |
| apache_software_foundation | apache_tomcat | — | — |
| apache_software_foundation | apache_tomcat | — | — |
| apache_software_foundation | apache_tomcat | — | — |
| debian | tomcat9 | — | — |
| mcafee | epolicy_orchestrator | < 5.10.0 | 5.10.0 |
| mcafee | epolicy_orchestrator | — | — |
| oracle | big_data_spatial_and_graph | < 23.1 | 23.1 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH