vulnerability
Ubuntu: (CVE-2021-42340): tomcat9 vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:N/A:P) | Oct 14, 2021 | Jun 26, 2025 | Aug 18, 2025 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
Oct 14, 2021
Added
Jun 26, 2025
Modified
Aug 18, 2025
Description
The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.
Solution
no-fix-ubuntu-package
References
- CVE-2021-42340
- https://attackerkb.com/topics/CVE-2021-42340
- CWE-772
- URL-https://github.com/apache/tomcat/commit/80f1438ec45e77a07b96419808971838d259eb47
- URL-https://github.com/apache/tomcat/commit/d27535bdee95d252418201eb21e9d29476aa6b6a
- URL-https://lists.apache.org/thread.html/r83a35be60f06aca2065f188ee542b9099695d57ced2e70e0885f905c%40%3Cannounce.tomcat.apache.org%3E
- URL-https://www.cve.org/CVERecord?id=CVE-2021-42340
- URL-https://www.openwall.com/lists/oss-security/2021/10/14/1
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