CVE-2021-21419
MEDIUMeventlet >=0.10 <0.31.0 - Uncontrolled Resource Consumption via WebSocket Frame
Title source: llmDescription
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.
References (3)
Core 3
Core References
Third Party Advisory x_refsource_confirm
https://github.com/eventlet/eventlet/security/advisories/GHSA-9p9m-jm8w-94p2
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5JZP4LZOSP7CUAM3GIRW6PIAWKH5VGB/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2WJFSBPLCNSZNHYQC4QDRDFRTEZRMD2L/
Scores
CVSS v3
5.3
EPSS
0.0179
EPSS Percentile
75.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Details
CWE
CWE-400
Status
published
Products (4)
eventlet/eventlet
0.10 - 0.31.0
fedoraproject/fedora
33
fedoraproject/fedora
34
pypi/eventlet
0.10 - 0.31.0PyPI
Published
May 07, 2021
Tracked Since
Feb 18, 2026