{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2018-8956","sourceIdentifier":"cve@mitre.org","published":"2020-05-06T19:15:12.410","lastModified":"2026-06-17T02:05:43.317","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"ntpd in ntp 4.2.8p10, 4.2.8p11, 4.2.8p12 and 4.2.8p13 allow remote attackers to prevent a broadcast client from synchronizing its clock with a broadcast NTP server via soofed mode 3 and mode 5 packets. The attacker must either be a part of the same broadcast network or control a slave in that broadcast network that can capture certain required packets on the attacker's behalf and send them to the attacker."},{"lang":"es","value":"ntpd en ntp versiones 4.2.8p10, 4.2.8p11, 4.2.8p12 y 4.2.8p13, permiten a atacantes remotos impedir que un cliente de multidifusión sincronice su reloj con un servidor NTP de multidifusión por medio de paquetes de modo 3 y modo 5 suplantados. El atacante debe ser parte de la misma red de multidifusión o controlar un esclavo en esa red de multidifusión que puede capturar determinados paquetes requeridos en nombre del atacante y enviarlos luego al atacante."}],"affected":[{"source":"cve@mitre.org","affectedData":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","baseScore":5.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":10.0,"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-20"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ntp:ntp:4.2.8:p10:*:*:*:*:*:*","matchCriteriaId":"0BC62D4E-D519-458C-BE4E-10DDB73A97D3"},{"vulnerable":true,"criteria":"cpe:2.3:a:ntp:ntp:4.2.8:p11:*:*:*:*:*:*","matchCriteriaId":"1C420117-862A-41A9-BAE8-8B3478FAEBC3"},{"vulnerable":true,"criteria":"cpe:2.3:a:ntp:ntp:4.2.8:p12:*:*:*:*:*:*","matchCriteriaId":"4A484251-3220-498C-83FE-A04B013A31A4"},{"vulnerable":true,"criteria":"cpe:2.3:a:ntp:ntp:4.2.8:p13:*:*:*:*:*:*","matchCriteriaId":"E0CE4157-852B-42ED-A77C-8A17B189432E"}]}]}],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html","source":"cve@mitre.org"},{"url":"http://www.ntp.org/","source":"cve@mitre.org","tags":["Vendor Advisory"]},{"url":"https://arxiv.org/abs/2005.01783","source":"cve@mitre.org","tags":["Third Party Advisory"]},{"url":"https://nikhiltripathi.in/NTP_attack.pdf","source":"cve@mitre.org","tags":["Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20200518-0006/","source":"cve@mitre.org"},{"url":"https://tools.ietf.org/html/rfc5905","source":"cve@mitre.org","tags":["Third Party Advisory"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ntp.org/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]},{"url":"https://arxiv.org/abs/2005.01783","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://nikhiltripathi.in/NTP_attack.pdf","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20200518-0006/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://tools.ietf.org/html/rfc5905","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}