CVE-2021-43821

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Summary

CVECVE-2021-43821
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-12-14 20:15:00 UTC
Updated2021-12-20 20:48:00 UTC
DescriptionOpencast is an Open Source Lecture Capture & Video Management for Education. Opencast before version 9.10 or 10.6 allows references to local file URLs in ingested media packages, allowing attackers to include local files from Opencast's host machines and making them available via the web interface. Before Opencast 9.10 and 10.6, Opencast would open and include local files during ingests. Attackers could exploit this to include most local files the process has read access to, extracting secrets from the host machine. An attacker would need to have the privileges required to add new media to exploit this. But these are often widely given. The issue has been fixed in Opencast 10.6 and 11.0. You can mitigate this issue by narrowing down the read access Opencast has to files on the file system using UNIX permissions or mandatory access control systems like SELinux. This cannot prevent access to files Opencast needs to read though and we highly recommend updating.

Risk And Classification

Problem Types: CWE-552

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Apereo Opencast All All All All

References

ReferenceSourceLinkTags
Files Accessible to External Parties · Advisory · opencast/opencast · GitHub CONFIRM github.com
opencast/IngestServiceImpl.java at 69952463971cf578363e3b97d8edaf334ff51253 · opencast/opencast · GitHub MISC github.com
Merge pull request from GHSA-59g4-hpg3-3gcp · opencast/opencast@65c46b9 · GitHub MISC github.com
Please Wait... | Cloudflare MISC mvnrepository.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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