CVE-2021-21419 – Improper Handling of Highly Compressed Data (Data Amplification) and Memory Allocation with Excessive Size Value in eventlet

https://notcve.org/view.php?id=CVE-2021-21419

Eventlet is a concurrent networking library for Python. A websocket peer may exhaust memory on Eventlet side by sending very large websocket frames. Malicious peer may exhaust memory on Eventlet side by sending highly compressed data frame. A patch in version 0.31.0 restricts websocket frame to reasonable limits. As a workaround, restricting memory usage via OS limits would help against overall machine exhaustion, but there is no workaround to protect Eventlet process. • https://github.com/eventlet/eventlet/security/advisories/GHSA-9p9m-jm8w-94p2 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2WJFSBPLCNSZNHYQC4QDRDFRTEZRMD2L https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5JZP4LZOSP7CUAM3GIRW6PIAWKH5VGB https://access.redhat.com/security/cve/CVE-2021-21419 https://bugzilla.redhat.com/show_bug.cgi?id=1958407 • CWE-400: Uncontrolled Resource Consumption •