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VULNERABILITIES

CVE-2021-32623 Details

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.

Metrics

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e CVEPatchThird Party Advisory
https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m CVEExploitThird Party Advisory
https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e [email protected]PatchThird Party Advisory
https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m [email protected]ExploitThird Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-776Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')[email protected]

Affected Products

ProductVersions
apereo opencast
< 9.6

CPE

  • cpe:2.3:a:apereo:opencast:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-32623
NVD Published Date:
Jun 16, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-32623 Details - Not Deferred