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Date: Wed, 13 Mar 2024 15:49:34 +0000
From: Mark Thomas <>
Subject: CVE-2024-23672: Apache Tomcat: WebSocket DoS with incomplete closing

Severity: important

Affected versions:

- Apache Tomcat 11.0.0-M1 through 11.0.0-M16
- Apache Tomcat 10.1.0-M1 through 10.1.18
- Apache Tomcat 9.0.0-M1 through 9.0.85
- Apache Tomcat 8.5.0 through 8.5.98


Denial of Service via incomplete cleanup vulnerability in Apache Tomcat. 
It was possible for WebSocket clients to keep WebSocket connections open 
leading to increased resource consumption.This issue affects Apache 
Tomcat: from 11.0.0-M1 through 11.0.0-M16, from 10.1.0-M1 through 
10.1.18, from 9.0.0-M1 through 9.0.85, from 8.5.0 through 8.5.98.

Users are recommended to upgrade to version 11.0.0-M17, 10.1.19, 9.0.86 
or 8.5.99 which fixes the issue.


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