CVE-2021-42340
Public on 2021-10-14
Modified on 2024-01-17
Description
A memory leak flaw was found in Apache Tomcat, where an HTTP upgrade connection does not release for WebSocket connections once the WebSocket connection is closed. If a sufficient number of such requests are made, an OutOfMemoryError occurs, leading to a denial of service. The highest threat from this vulnerability is to system availability.
Severity
Important
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Tomcat8.5 Extra | tomcat | 2023-08-21 | ALAS2TOMCAT8.5-2023-006 | Fixed |
| Amazon Linux 2 - Tomcat9 Extra | tomcat | 2023-08-21 | ALAS2TOMCAT9-2023-006 | Fixed |
| Amazon Linux 1 | tomcat7 | No Fix Planned | ||
| Amazon Linux 1 | tomcat8 | 2021-10-29 | ALAS-2021-1546 | Fixed |
| Amazon Linux 2023 | tomcat9 | Not Affected |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | CVSSv2 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| NVD | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |