CVE-2021-22981

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TLS connections that do not use EMS are vulnerable to man-in-the-middle attacks during renegotiation. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated."}, {"lang": "es", "value": "En todas las versiones de BIG-IP 12.1.x y 11.6.x, el protocolo TLS original incluye una debilidad en la negociaci\u00f3n del secreto maestro que es mitigada por la extensi\u00f3n Extended Master Secret (EMS) definida en RFC 7627. Las conexiones TLS que no utilizan EMS son vulnerables a ataques man-in-the-middle durante la renegociaci\u00f3n. Nota: No son evaluadas las versiones de software que han alcanzado End of Software Development (EoSD)"}], "id": "CVE-2021-22981", "lastModified": "2026-06-17T03:38:08.890", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-02-12T18:15:12.797", "references": [{"source": "f5sirt@f5.com", "tags": ["Vendor Advisory"], "url": "https://support.f5.com/csp/article/K09121542"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://support.f5.com/csp/article/K09121542"}], "sourceIdentifier": "f5sirt@f5.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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