CVE-2021-3505

{"id": "CVE-2021-3505", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 2.1, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2021-04-19T21:15:13.270", "references": [{"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1950046", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://github.com/stefanberger/libtpms/issues/183", "tags": ["Exploit", "Patch", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1950046", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/stefanberger/libtpms/issues/183", "tags": ["Exploit", "Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-331"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in libtpms in versions before 0.8.0. The TPM 2 implementation returns 2048 bit keys with ~1984 bit strength due to a bug in the TCG specification. The bug is in the key creation algorithm in RsaAdjustPrimeCandidate(), which is called before the prime number check. The highest threat from this vulnerability is to data confidentiality."}, {"lang": "es", "value": "Se encontr\u00f3 un fallo en libtpms en versiones anteriores a 0.8.0. La implementaci\u00f3n de TPM 2 devuelve claves de 2048 bits con una intensidad de bits de ~1984 debido a un error en la especificaci\u00f3n TCG. El error est\u00e1 en el algoritmo de creaci\u00f3n de claves en la funci\u00f3n RsaAdjustPrimeCandidate(), que es llamado antes de la comprobaci\u00f3n del n\u00famero primo. La mayor amenaza de esta vulnerabilidad es la confidencialidad de los datos"}], "lastModified": "2024-11-21T06:21:42.280", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1A8A1473-AE41-46BD-98C5-1642BFBD6D47", "versionEndExcluding": "0.8.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*", "vulnerable": true, "matchCriteriaId": "3AA08768-75AF-4791-B229-AE938C780959"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}