It has to do with not releasing http websocket connections properly. So its
both. We just had to upgrade to 9.0.53 on everything because of this.
Shawn Beard • Sr. Systems Engineer
Middleware Engineering
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-----Original Message-----
From: James H. H. Lampert <[email protected]>
Sent: Monday, December 6, 2021 1:29 PM
To: Tomcat Users List <[email protected]>
Subject: Re: [SECURITY] CVE-2021-42340 Apache Tomcat DoS [EXTERNAL]
** CAUTION: External message
On 10/14/21 7:12 AM, Mark Thomas wrote:
> The fix for bug 63362 introduced a memory leak. The object introduced
> to collect metrics for HTTP upgrade connections was not released for
> WebSocket connections once the WebSocket connection was closed. This
> created a memory leak that, over time, could lead to a denial of
> service via an OutOfMemoryError.
Question:
Is this even an issue if the Tomcat is configured to *only* listen on 443, and
rejects non-HTTPS connections outright?
--
JHHL
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