Vulnerability · Published Jun 15, 2021 · Assigned by GitHub_M
CVE-2021-32623Opencast vulnerable to billion laughs attack (XML bomb)
High 8.1
In plain English
A high-severity security flaw in opencast from opencast. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.opencastproject:opencast-kernel | 9.6 | GHSA-9gwx-9cwp-5c2m |
Affected products (as reported)
Weakness: CWE-776 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H