Vulnerability in org.opencastproject:opencast-ingest-service-impl (CVE-2021-43821)
Summary
Vulnerability in org.opencastproject:opencast-ingest-service-impl (CVE-2021-43821). Confidential information can be exposed externally. Mitigation: upgrade to 10.6 or later.
Original description
The description as published by the source.
Opencast 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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2021-43821 has been found in org.opencastproject:opencast-ingest-service-impl.
Confidential information can be exposed externally.
What to do: upgrade org.opencastproject:opencast-ingest-service-impl to 10.6 or later.
If unsure, ask your IT team or search "org.opencastproject:opencast-ingest-service-impl CVE-2021-43821" on the vendor's site.
CVE-2021-43821 (org.opencastproject:opencast-ingest-service-impl) — CWE-552
Attack vector: remote (network-reachable) / no user interaction
Patched: 10.6 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-552) exists in org.opencastproject:opencast-ingest-service-impl.
Check the vendor advisory for the affected versions of org.opencastproject:opencast-ingest-service-impl.
Severity: ?. Confidential information can be exposed externally.
Update to 10.6.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで org.opencastproject:opencast-ingest-service-impl を使っているサービスとバージョンを洗い出す。
-
2Apply patch patch
Upgrade org.opencastproject:opencast-ingest-service-impl to 10.6ステージング環境で 10.6 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- advisory mvnrepository.com
- package github.com
- patch github.com
- patch github.com
- report github.com