CVE-2021-21419

MEDIUM

eventlet >=0.10 <0.31.0 - Uncontrolled Resource Consumption via WebSocket Frame

Title source: llm
STIX 2.1

Description

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.

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