CVE-2021-32623: high-severity vulnerability in opencast
Opencast vulnerable to billion laughs attack (XML bomb)
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.1epss 1.3%
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Affected products
opencast · opencastRelated CVEs — opencast
In the same product, most dangerous first.
CVE-2021-43821CRITICALFiles Accessible to External Parties in OpencastEPSS 2.0%CVE-2021-43807HIGHHTTP Method Spoofing in OpencastEPSS 1.5%CVE-2020-5206HIGHAuthentication Bypass For Endpoints With Anonymous Access in OpenCastEPSS 1.3%CVE-2020-5230HIGHOpencast uses unsafe identifiersEPSS 1.2%CVE-2020-5228HIGHOpencast allows unauthorized public access via OAI-PMHEPSS 1.0%CVE-2020-5222MEDIUMHard-Coded Key Used For Remember-me Token in OpenCastEPSS 0.9%