CVE-2021-21419
Eventlet Websocket Denial of Service (DoS) Memory Exhaustion
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.
INFO
Published Date :
May 7, 2021, 3:15 p.m.
Last Modified :
Nov. 7, 2023, 3:30 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-21419.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-21419 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21419 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5JZP4LZOSP7CUAM3GIRW6PIAWKH5VGB/ [No types assigned] Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2WJFSBPLCNSZNHYQC4QDRDFRTEZRMD2L/ [No types assigned] Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/R5JZP4LZOSP7CUAM3GIRW6PIAWKH5VGB/ Removed Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/2WJFSBPLCNSZNHYQC4QDRDFRTEZRMD2L/ -
Modified Analysis by [email protected]
May. 27, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/2WJFSBPLCNSZNHYQC4QDRDFRTEZRMD2L/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/2WJFSBPLCNSZNHYQC4QDRDFRTEZRMD2L/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/R5JZP4LZOSP7CUAM3GIRW6PIAWKH5VGB/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/R5JZP4LZOSP7CUAM3GIRW6PIAWKH5VGB/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* -
CVE Modified by [email protected]
May. 25, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/R5JZP4LZOSP7CUAM3GIRW6PIAWKH5VGB/ [No Types Assigned] Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/2WJFSBPLCNSZNHYQC4QDRDFRTEZRMD2L/ [No Types Assigned] -
Initial Analysis by [email protected]
May. 14, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Changed Reference Type https://github.com/eventlet/eventlet/security/advisories/GHSA-9p9m-jm8w-94p2 No Types Assigned https://github.com/eventlet/eventlet/security/advisories/GHSA-9p9m-jm8w-94p2 Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:eventlet:eventlet:*:*:*:*:*:*:*:* versions from (including) 0.10 up to (excluding) 0.31.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21419 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-21419
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} 0.02%
score
0.46802
percentile