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CVE-2021-42340

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.

POC

Reference

- https://kc.mcafee.com/corporate/index?page=content&id=SB10379

- https://www.oracle.com/security-alerts/cpuapr2022.html

- https://www.oracle.com/security-alerts/cpujan2022.html

- https://www.oracle.com/security-alerts/cpujul2022.html

Github

- https://github.com/20142995/nuclei-templates

- https://github.com/ARPSyndicate/cvemon

- https://github.com/PalindromeLabs/awesome-websocket-security

- https://github.com/cyb3r-w0lf/nuclei-template-collection

- https://github.com/malwaremily/infosec-news-briefs