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anteriores, cuando el algoritmo de firma digital de la curva el\u00edmptica(ECDSA) se utiliza para el conjunto de cifrado ECDHE_ECDSA, no aplica adecuadamente las curvas sobre campos binarios, lo que hace que sea m\u00e1s f\u00e1cil para el atacantes dependientes del contexto determinar las claves privadas a trav\u00e9s de un ataque de oportunidad y un c\u00e1lculo del entramado (lattice)."}], "id": "CVE-2011-1945", "lastModified": "2026-04-29T01:13:23.040", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.6, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 4.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2011-05-31T20:55:05.267", "references": [{"source": "secalert@redhat.com", "tags": ["Exploit"], "url": "http://eprint.iacr.org/2011/232.pdf"}, {"source": "secalert@redhat.com", "url": "http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html"}, {"source": "secalert@redhat.com", "url": "http://secunia.com/advisories/44935"}, {"source": "secalert@redhat.com", "url": "http://support.apple.com/kb/HT5784"}, {"source": "secalert@redhat.com", "url": "http://www.debian.org/security/2011/dsa-2309"}, {"source": "secalert@redhat.com", "tags": ["US Government Resource"], "url": "http://www.kb.cert.org/vuls/id/536044"}, {"source": "secalert@redhat.com", "tags": ["US Government Resource"], "url": "http://www.kb.cert.org/vuls/id/MAPG-8FENZ3"}, {"source": "secalert@redhat.com", "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:136"}, {"source": "secalert@redhat.com", "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:137"}, {"source": "secalert@redhat.com", "url": "https://hermes.opensuse.org/messages/8760466"}, {"source": "secalert@redhat.com", "url": "https://hermes.opensuse.org/messages/8764170"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit"], "url": "http://eprint.iacr.org/2011/232.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://secunia.com/advisories/44935"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://support.apple.com/kb/HT5784"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.debian.org/security/2011/dsa-2309"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["US Government Resource"], "url": "http://www.kb.cert.org/vuls/id/536044"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["US Government Resource"], "url": "http://www.kb.cert.org/vuls/id/MAPG-8FENZ3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:136"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:137"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://hermes.opensuse.org/messages/8760466"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://hermes.opensuse.org/messages/8764170"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-310"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank CERT/CC for reporting this issue.", "bugzilla": {"description": "openssl: ECDSA private key leak through a remote timing attack", "id": "709021", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=709021"}, "csaw": false, "cvss": {"cvss_base_score": "4.3", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "status": "draft"}, "details": ["The elliptic curve cryptography (ECC) subsystem in OpenSSL 1.0.0d and earlier, when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE_ECDSA cipher suite, does not properly implement curves over binary fields, which makes it easier for context-dependent attackers to determine private keys via a timing attack and a lattice calculation."], "name": "CVE-2011-1945", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:3", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 3"}, {"cpe": "cpe:/o:redhat:enterprise_linux:3", "fix_state": "Not affected", "package_name": "openssl096b", "product_name": "Red Hat Enterprise Linux 3"}, {"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Not affected", "package_name": "openssl096b", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "openssl097a", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "openssl098e", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2011-05-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-1945\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-1945"], "statement": "Not vulnerable. This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 3, 4, 5, or 6, as they do not include the support for the elliptic curve cryptography.", "threat_severity": "Important"}

{}