{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-20T18:09:28.470","vulnerabilities":[{"cve":{"id":"CVE-2018-20187","sourceIdentifier":"cve@mitre.org","published":"2019-03-08T19:29:00.250","lastModified":"2024-11-21T04:01:02.913","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A side-channel issue was discovered in Botan before 2.9.0. An attacker capable of precisely measuring the time taken for ECC key generation may be able to derive information about the high bits of the secret key, as the function to derive the public point from the secret scalar uses an unblinded Montgomery ladder whose loop iteration count depends on the bitlength of the secret. This issue affects only key generation, not ECDSA signatures or ECDH key agreement."},{"lang":"es","value":"Se ha detectado un fallo de canal lateral en Botan en versiones anteriores a la 2.9.0. Un atacante que sea capaz de medir con precisión el tiempo que tarda en generarse una clave ECC podría ser capaz de obtener información sobre el alto número de bits de la clave secreta, ya que la función para obtener el punto público del escalar secreto emplea una \"escalera de Montgomery\", cuya iteración de bucles depende de la longitud de bits del secreto. Esto afecta solamente a la generación de claves y no a las firmas ECDSA y concordancia de claves ECDH."}],"metrics":{"cvssMetricV30":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":3.6}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:N/A:N","baseScore":4.3,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-320"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:*","versionEndExcluding":"2.9.0","matchCriteriaId":"2D1FAA67-A163-4976-B133-2A6281733EA1"}]}]}],"references":[{"url":"https://botan.randombit.net/news.html","source":"cve@mitre.org","tags":["Release Notes","Vendor Advisory"]},{"url":"https://botan.randombit.net/security.html","source":"cve@mitre.org","tags":["Vendor Advisory"]},{"url":"https://github.com/crocs-muni/ECTester","source":"cve@mitre.org","tags":["Not Applicable","Third Party Advisory"]},{"url":"https://botan.randombit.net/news.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes","Vendor Advisory"]},{"url":"https://botan.randombit.net/security.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]},{"url":"https://github.com/crocs-muni/ECTester","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Not Applicable","Third Party Advisory"]}]}}]}