CVE-2021-21318

{"id": "CVE-2021-21318", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 4.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 2.5, "exploitabilityScore": 2.8}, {"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 2.5, "exploitabilityScore": 2.8}]}, "published": "2021-02-18T18:15:11.490", "references": [{"url": "https://github.com/opencast/opencast/commit/b18c6a7f81f08ed14884592a6c14c9ab611ad450", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/opencast/opencast/security/advisories/GHSA-vpc2-3wcv-qj4w", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "Opencast is a free, open-source platform to support the management of educational audio and video content. In Opencast before version 9.2 there is a vulnerability in which publishing an episode with strict access rules will overwrite the currently set series access. This allows for an easy denial of access for all users without superuser privileges, effectively hiding the series. Access to series and series metadata on the search service (shown in media module and player) depends on the events published which are part of the series. Publishing an event will automatically publish a series and update access to it. Removing an event or republishing the event should do the same. Affected versions of Opencast may not update the series access or remove a published series if an event is being removed. On removal of an episode, this may lead to an access control list for series metadata with broader access rules than the merged access rules of all remaining events, or the series metadata still being available although all episodes of that series have been removed. This problem is fixed in Opencast 9.2."}, {"lang": "es", "value": "Opencast es una plataforma gratuita de c\u00f3digo abierto para respaldar la administraci\u00f3n de contenido educativo de audio y video. En Opencast versiones anteriores a 9.2, se presenta una vulnerabilidad en la que la publicaci\u00f3n de un episodio con reglas de acceso estrictas sobrescribir\u00e1 el acceso a la serie configurada actualmente. Esto permite una f\u00e1cil denegaci\u00f3n de acceso para todos los usuarios sin privilegios de superusuario, ocultando efectivamente la serie. El acceso a series y metadatos de series en el servicio de b\u00fasqueda (mostrado en m\u00f3dulo multimedia y reproductor) depende de los eventos publicados que forman parte de la serie. La publicaci\u00f3n de un evento publicar\u00e1 autom\u00e1ticamente una serie y actualizar\u00e1 el acceso a ella. Eliminar un evento o volver a publicarlo deber\u00eda hacer lo mismo. Es posible que las versiones afectadas de Opencast no actualicen el acceso a la serie ni eliminen una serie publicada si un evento ha sido eliminado. Al eliminar un episodio, esto puede conllevar a una lista de control de acceso para los metadatos de la serie con reglas de acceso m\u00e1s amplias que las reglas de acceso combinadas de todos los eventos restantes, o que los metadatos de la serie sigan estando disponibles aunque todos los episodios de esa serie hayan sido eliminados. Este problema se corrigi\u00f3 en Opencast versi\u00f3n 9.2"}], "lastModified": "2021-02-26T04:04:04.403", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apereo:opencast:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0BD75109-ECB3-42D8-AC2E-F6AB4E080C14", "versionEndExcluding": "9.2"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}