CVE-2020-28942

{"id": "CVE-2020-28942", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "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": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "published": "2020-11-19T17:15:13.310", "references": [{"url": "https://support.primekey.com/news/posts/40", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-295"}]}], "descriptions": [{"lang": "en", "value": "An issue exists in PrimeKey EJBCA before 7.4.3 when enrolling with EST while proxied through an RA over the Peers protocol. As a part of EJBCA's domain security model, the peer connector allows the restriction of client certificates (for the RA, not the end user) to a limited set of allowed CAs, thus restricting the accessibility of that RA to the rights it has within a specific role. While this works for other protocols such as CMP, it was found that the EJBCA enrollment over an EST implementation bypasses this check, allowing enrollment with a valid client certificate through any functioning and authenticated RA connected to the CA. NOTE: an attacker must already have a trusted client certificate and authorization to enroll against the targeted CA."}, {"lang": "es", "value": "Se presenta un problema en PrimeKey EJBCA versiones anteriores a 7.4.3 cuando se inscribe con EST mientras se realiza un proxy por medio de un RA sobre el protocolo Peers. Como parte del modelo de seguridad de dominio de EJBCA, el conector de peers permite la restricci\u00f3n de certificados de cliente (para el RA, no para el usuario final) a un ajuste limitado de CAs permitidas, restringiendo as\u00ed la accesibilidad de ese RA a los derechos que presenta dentro de un papel espec\u00edfico. Si bien esto funciona para otros protocolos como CMP, se encontr\u00f3 que la inscripci\u00f3n EJBCA sobre una implementaci\u00f3n de EST al omitir esta comprobaci\u00f3n, permite la inscripci\u00f3n con un certificado de cliente v\u00e1lido por medio de cualquier RA autenticado y en funcionamiento conectado a la CA. NOTA: un atacante ya debe tener un certificado de cliente confiable y autorizaci\u00f3n para inscribirse en la CA apuntado"}], "lastModified": "2020-12-03T18:54:00.837", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:primekey:ejbca:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "1AD6F9F4-0E93-4978-9585-1748B9F3B2F5", "versionEndExcluding": "7.4.3"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}