CVE-2021-4314

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{"affected": [{"affectedData": [{"product": "Zowe", "vendor": "Open Mainframe Project", "versions": [{"lessThan": "1.19.0", "status": "affected", "version": "1.16.0", "versionType": "semver"}]}], "source": "zowe-security@lists.openmainframeproject.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:linuxfoundation:zowe_api_mediation_layer:*:*:*:*:*:*:*:*", "matchCriteriaId": "E12D0354-4008-4E89-8AD4-DCE9AFB6BDA1", "versionEndExcluding": "1.19.0", "versionStartIncluding": "1.16.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "It is possible to manipulate the JWT token without the knowledge of the JWT secret and authenticate without valid JWT token as any user. This is happening only in the situation when zOSMF doesn\u2019t have the APAR PH12143 applied. This issue affects: 1.16 versions to 1.19. What happens is that the services using the ZAAS client or the API ML API to query will be deceived into believing the information in the JWT token is valid when it isn\u2019t. It\u2019s possible to use this to persuade the southbound service that different user is authenticated."}, {"lang": "es", "value": "Es posible manipular el token JWT sin conocer el secreto de JWT y autenticarse sin un token JWT v\u00e1lido como cualquier usuario. Esto sucede s\u00f3lo en la situaci\u00f3n en la que zOSMF no tiene aplicado el APAR PH12143. Este problema afecta: versiones 1.16 a 1.19. Lo que sucede es que los servicios que utilizan el cliente ZAAS o la API API ML para realizar consultas ser\u00e1n enga\u00f1ados haci\u00e9ndoles creer que la informaci\u00f3n en el token JWT es v\u00e1lida cuando no lo es. Es posible utilizar esto para persuadir al servicio en direcci\u00f3n sur de que un usuario diferente est\u00e1 autenticado."}], "id": "CVE-2021-4314", "lastModified": "2026-06-17T04:19:29.310", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-4314", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-04-02T16:07:48.197704Z", "version": "2.0.3"}}]}, "published": "2023-01-18T16:15:11.130", "references": [{"source": "zowe-security@lists.openmainframeproject.org", "tags": ["Product"], "url": "https://github.com/zowe/api-layer/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product"], "url": "https://github.com/zowe/api-layer/"}], "sourceIdentifier": "zowe-security@lists.openmainframeproject.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-269"}], "source": "zowe-security@lists.openmainframeproject.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-287"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-269"}, {"lang": "en", "value": "CWE-287"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

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