CVE-2021-43850
Discourse Message Bus Denial of Service Vulnerability
Description
Discourse is an open source platform for community discussion. In affected versions admins users can trigger a Denial of Service attack via the `/message-bus/_diagnostics` path. The impact of this vulnerability is greater on multisite Discourse instances (where multiple forums are served from a single application server) where any admin user on any of the forums are able to visit the `/message-bus/_diagnostics` path. The problem has been patched. Please upgrade to 2.8.0.beta10 or 2.7.12. No workarounds for this issue exist.
INFO
Published Date :
Jan. 4, 2022, 8:15 p.m.
Last Modified :
Jan. 14, 2022, 2:50 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
2.3
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-2021-43850
.
URL | Resource |
---|---|
https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39 | Patch Third Party Advisory |
https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr | Exploit 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-2021-43850
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-43850
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 -
Initial Analysis by [email protected]
Jan. 14, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H Changed Reference Type https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39 No Types Assigned https://github.com/discourse/discourse/commit/7a8ec129fb54f188b2da6588c9d24d3a36eb0d39 Patch, Third Party Advisory Changed Reference Type https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr No Types Assigned https://github.com/discourse/discourse/security/advisories/GHSA-59jr-pj65-qmvr Exploit, Third Party Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.12 *cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:* *cpe:2.3:a:discourse:discourse:2.8.0:beta2:*:*:*:*:*:* *cpe:2.3:a:discourse:discourse:2.8.0:beta3:*:*:*:*:*:* *cpe:2.3:a:discourse:discourse:2.8.0:beta4:*:*:*:*:*:* *cpe:2.3:a:discourse:discourse:2.8.0:beta5:*:*:*:*:*:* *cpe:2.3:a:discourse:discourse:2.8.0:beta6:*:*:*:*:*:* *cpe:2.3:a:discourse:discourse:2.8.0:beta7:*:*:*:*:*:* *cpe:2.3:a:discourse:discourse:2.8.0:beta8:*:*:*:*:*:* *cpe:2.3:a:discourse:discourse:2.8.0:beta9:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-43850
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-2021-43850
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.07 }} 0.01%
score
0.28878
percentile