CVE-2021-20237
ZeroMQ Unauthenticated Memory Consumption Denial of Service Vulnerability
Description
An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ's src/xpub.cpp in versions before 4.3.3. This flaw allows a remote unauthenticated attacker to send crafted PUB messages that consume excessive memory if the CURVE/ZAP authentication is disabled on the server, causing a denial of service. The highest threat from this vulnerability is to system availability.
INFO
Published Date :
May 28, 2021, 11:15 a.m.
Last Modified :
Aug. 5, 2022, 3:20 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
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-2021-20237.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1921989 | Issue Tracking Third Party Advisory |
| https://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxw | Patch Third Party Advisory |
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-2021-20237 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20237 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 -
Reanalysis by [email protected]
Aug. 05, 2022
Action Type Old Value New Value Added CWE NIST CWE-401 -
Initial Analysis by [email protected]
Jun. 08, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/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:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1921989 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1921989 Issue Tracking, Third Party Advisory Changed Reference Type https://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxw No Types Assigned https://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxw Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:zeromq:libzmq:*:*:*:*:*:*:*:* versions from (including) 4.2.0 up to (excluding) 4.3.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-20237 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-2021-20237
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.25 }} 0.06%
score
0.64494
percentile