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GHSA-9p9m-jm8w-94p2

Improper Handling of Highly Compressed Data (Data Amplification) and Memory Allocation with Excessive Size Value in eventlet

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-21419

Packages

EcosystemPackageAffectedFixed in
PyPI eventlet >= 0.10, < 0.31.0 0.31.0

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact 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. ### Patches Version 0.31.0 restricts websocket frame to reasonable limits. ### Workarounds Restricting memory usage via OS limits would help against overall machine exhaustion. No workaround to protect Eventlet process. ### For more information If you have any questions or comments about this advisory: * Open an issue in [eventlet](https://github.com/eventlet/eventlet/issues) * Contact current maintainers. At 2021-03: [email protected] or https://t.me/temotor

References

External links from the advisory. They lead to third-party sites.