CVE-2021-21419

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.

Risk Information

Base Score

5.3

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS Score

Exploitation Probability

0.13

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2021-21419 are fixed in Python-eventlet 0.31.0	Windows
concurrent networking library (USN-4956-1) python3-eventlet_0.25.1-2ubuntu1.1_all.deb	Linux
concurrent networking library (USN-4956-1) python3-eventlet_0.26.1-0ubuntu1.1_all.deb	Linux
concurrent networking library (USN-4956-1) python3-eventlet_0.30.0-0ubuntu1.1_all.deb	Linux
Vulnerabilities CVE-2021-21419 are fixed in Python-eventlet for linux 0.31.0	Linux
CVE-2021-21419	NCM

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234