Tracker / CVE-2021-43980
CVE-2021-43980
Low 3.7
The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.
Affected products and versions
| apache | tomcat |
|---|---|
| apache | tomcat · 10.0.0 → 10.0.18 |
| apache | tomcat · 8.5.0 → 8.5.77 |
| apache | tomcat · 9.0.0 → 9.0.60 |
| debian | debian_linux |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.