CVE-2021-32623 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5