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CVE-2021-21419

Published: 7 May 2021

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.

Priority

Medium

CVSS 3 base score: 5.3

Status

Package Release Status
python-eventlet
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal
Released (0.25.1-2ubuntu1.1)
groovy
Released (0.26.1-0ubuntu1.1)
hirsute
Released (0.30.0-0ubuntu1.1)
impish
Released (0.30.0-0ubuntu2)
jammy
Released (0.30.0-0ubuntu2)
precise Does not exist

trusty Does not exist

upstream
Released (0.31.0)
xenial Not vulnerable
(code not present)

Notes

AuthorNote
leosilva
support for permessage-defalte extension or compression extension
was added by b7d2a251ad55e1c161aa6c8aa236db456c4c4a21 and it's not
present in versions of Bionic and xenial/esm-infra.

References

Bugs