{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-18T09:43:08.640","vulnerabilities":[{"cve":{"id":"CVE-2023-49786","sourceIdentifier":"security-advisories@github.com","published":"2023-12-14T20:15:52.927","lastModified":"2024-11-21T08:33:50.533","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6."},{"lang":"es","value":"Asterisk es un conjunto de herramientas de telefonía y centralita privada de código abierto. En Asterisk anteriores a las versiones 18.20.1, 20.5.1 y 21.0.1; así como certificado-asterisco anterior a 18.9-cert6; Asterisk es susceptible a un DoS debido a una condición de ejecución en la fase \"hello handshake\" del protocolo DTLS cuando maneja DTLS-SRTP para la configuración de medios. Este ataque se puede realizar de forma continua, negando así nuevas llamadas cifradas DTLS-SRTP durante el ataque. El abuso de esta vulnerabilidad puede provocar una denegación de servicio masiva en servidores Asterisk vulnerables para llamadas que dependen de DTLS-SRTP. El commit d7d7764cb07c8a1872804321302ef93bf62cba05 contiene una solución, que forma parte de las versiones 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6."}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":3.6}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-703"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-362"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*","versionEndExcluding":"18.20.1","matchCriteriaId":"A49E9157-3440-47C5-B730-B1F3BE7240C9"},{"vulnerable":true,"criteria":"cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*","versionStartIncluding":"19.0.0","versionEndExcluding":"20.5.1","matchCriteriaId":"FCA06EB6-E31A-43B2-A750-186255114B8F"},{"vulnerable":true,"criteria":"cpe:2.3:a:digium:asterisk:21.0.0:*:*:*:*:*:*:*","matchCriteriaId":"D3E690E3-3E92-42ED-87DD-1C6B838A3FF9"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:*:*:*:*:*:*:*","matchCriteriaId":"2AFE2011-05AA-45A6-A561-65C6C664DA7B"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1:*:*:*:*:*:*","matchCriteriaId":"C1117AA4-CE6B-479B-9995-A9F71C430663"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc1:*:*:*:*:*:*","matchCriteriaId":"775041BD-5C86-42B6-8B34-E1D5171B3D87"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc2:*:*:*:*:*:*","matchCriteriaId":"55EC2877-2FF5-4777-B118-E764A94BCE56"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc3:*:*:*:*:*:*","matchCriteriaId":"EB0392C9-A5E9-4D71-8B8D-63FB96E055A5"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc4:*:*:*:*:*:*","matchCriteriaId":"09AF962D-D4BB-40BA-B435-A59E4402931C"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert2:*:*:*:*:*:*","matchCriteriaId":"559D1063-7F37-44F8-B5C6-94758B675FDF"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert3:*:*:*:*:*:*","matchCriteriaId":"185B2B4B-B246-4379-906B-9BDA7CDD4400"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:rc1:*:*:*:*:*:*","matchCriteriaId":"73D3592D-3CE5-4462-9FE8-4BCB54E74B5B"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:13.13.0:rc2:*:*:*:*:*:*","matchCriteriaId":"B3CCE9E0-5DC4-43A2-96DB-9ABEA60EC157"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:-:*:*:*:*:*:*","matchCriteriaId":"1EAD713A-CBA2-40C3-9DE3-5366827F18C7"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert1:*:*:*:*:*:*","matchCriteriaId":"A5F5A8B7-29C9-403C-9561-7B3E96F9FCA8"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert10:*:*:*:*:*:*","matchCriteriaId":"F9B96A53-2263-463C-9CCA-0F29865FE500"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert11:*:*:*:*:*:*","matchCriteriaId":"A53049F1-8551-453E-834A-68826A7AA959"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert12:*:*:*:*:*:*","matchCriteriaId":"B224A4E9-4B6B-4187-B0D6-E4BAE2637960"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert2:*:*:*:*:*:*","matchCriteriaId":"9501DBFF-516D-4F26-BBF6-1B453EE2A630"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert3:*:*:*:*:*:*","matchCriteriaId":"9D3E9AC0-C0B4-4E87-8D48-2B688D28B678"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert4:*:*:*:*:*:*","matchCriteriaId":"1A8628F6-F8D1-4C0C-BD89-8E2EEF19A5F9"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert5:*:*:*:*:*:*","matchCriteriaId":"E27A6FD1-9321-4C9E-B32B-D6330CD3DC92"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert6:*:*:*:*:*:*","matchCriteriaId":"B6BF5EDB-9D17-453D-A22E-FDDC4DCDD85B"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert7:*:*:*:*:*:*","matchCriteriaId":"4C75A21E-5D05-434B-93DE-8DAC4DD3E587"},{"vulnerable":true,"criteria":"cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert8:*:*:*:*:*: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