CVE-2021-32623
Opencast Billion Laughs Denial of Service Vulnerability
Description
Opencast is a free and open source solution for automated video capture and distribution. Versions of Opencast prior to 9.6 are vulnerable to the billion laughs attack, which allows an attacker to easily execute a (seemingly permanent) denial of service attack, essentially taking down Opencast using a single HTTP request. To exploit this, users need to have ingest privileges, limiting the group of potential attackers The problem has been fixed in Opencast 9.6. There is no known workaround for this issue.
INFO
Published Date :
June 16, 2021, 12:15 a.m.
Last Modified :
Nov. 21, 2024, 6:07 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
2.8
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-2021-32623.
| URL | Resource |
|---|---|
| https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e | Patch Third Party Advisory |
| https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m | Exploit Third Party Advisory |
| https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e | Patch Third Party Advisory |
| https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m | 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-2021-32623 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-32623 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e Added Reference https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jun. 23, 2021
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:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e No Types Assigned https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e Patch, Third Party Advisory Changed Reference Type https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m No Types Assigned https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m Exploit, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:apereo:opencast:*:*:*:*:*:*:*:* versions up to (excluding) 9.6
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-32623 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-2021-32623
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} -0.02%
score
0.26076
percentile