CVE-2021-21419

Advisory

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Affected package

Affected versions

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Fixed versions

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Vulnerability changelog

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. See CVE-2021-21419.


CONFIRM:https://github.com/eventlet/eventlet/security/advisories/GHSA-9p9m-jm8w-94p2: https://github.com/eventlet/eventlet/security/advisories/GHSA-9p9m-jm8w-94p2

Resources

• https://github.com/eventlet/eventlet/security/advisories/GHSA-9p9m-jm8w-94p2
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21419
• https://lists.fedoraproject.org/archives/list/[email protected]/message/R5JZP4LZOSP7CUAM3GIRW6PIAWKH5VGB/
• https://lists.fedoraproject.org/archives/list/[email protected]/message/2WJFSBPLCNSZNHYQC4QDRDFRTEZRMD2L/