2 lines
5.7 KiB
JSON
2 lines
5.7 KiB
JSON
{"affected":[{"affectedData":[{"product":"synapse","vendor":"matrix-org","versions":[{"status":"affected","version":">=0.99.0, < 1.25.0"}]}],"source":"security-advisories@github.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*","matchCriteriaId":"6C16EE11-380E-400F-9A55-6068AAF132D8","versionEndExcluding":"1.25.0","versionStartIncluding":"0.99.0","vulnerable":true}],"negate":false,"operator":"OR"}]},{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*","matchCriteriaId":"A930E247-0B43-43CB-98FF-6CE7B8189835","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.25.0, a malicious homeserver could redirect requests to their .well-known file to a large file. This can lead to a denial of service attack where homeservers will consume significantly more resources when requesting the .well-known file of a malicious homeserver. This affects any server which accepts federation requests from untrusted servers. Issue is resolved in version 1.25.0. As a workaround the `federation_domain_whitelist` setting can be used to restrict the homeservers communicated with over federation."},{"lang":"es","value":"Synapse es un servidor doméstico de referencia de Matrix escrito en python (paquete pypi matrix-synapse). Matrix es un ecosistema para VoIP y mensajería instantánea federada abierta. En Synapse versiones anteriores a 1.25.0, un servidor doméstico malicioso podía redireccionar las peticiones para su archivo .well-known a un archivo grande. Esto puede conllevar a un ataque de denegación de servicio en el que los servidores domésticos consumirán significativamente más recursos al solicitar el archivo .well-known de un servidor doméstico malicioso. Esto afecta a cualquier servidor que acepte peticiones de federación desde servidores que no sean confiables. El problema es resuelto en versión 1.25.0. Como solución alternativa, el ajuste de \"federation_domain_whitelist\" puede ser usado para restringir los servidores domésticos que se comunican con la federación"}],"id":"CVE-2021-21274","lastModified":"2026-06-17T03:35:10.330","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"MEDIUM","cvssData":{"accessComplexity":"MEDIUM","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"PARTIAL","baseScore":4.3,"confidentialityImpact":"NONE","integrityImpact":"NONE","vectorString":"AV:N/AC:M/Au:N/C:N/I:N/A:P","version":"2.0"},"exploitabilityScore":8.6,"impactScore":2.9,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":true}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"exploitabilityScore":2.8,"impactScore":1.4,"source":"security-advisories@github.com","type":"Secondary"},{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"exploitabilityScore":2.8,"impactScore":3.6,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2021-02-26T18:15:12.237","references":[{"source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"],"url":"https://github.com/matrix-org/synapse/commit/ff5c4da1289cb5e097902b3e55b771be342c29d6"},{"source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"],"url":"https://github.com/matrix-org/synapse/pull/8950"},{"source":"security-advisories@github.com","tags":["Third Party Advisory"],"url":"https://github.com/matrix-org/synapse/releases/tag/v1.25.0"},{"source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"],"url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-2hwx-mjrm-v3g8"},{"source":"security-advisories@github.com","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"],"url":"https://github.com/matrix-org/synapse/commit/ff5c4da1289cb5e097902b3e55b771be342c29d6"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"],"url":"https://github.com/matrix-org/synapse/pull/8950"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://github.com/matrix-org/synapse/releases/tag/v1.25.0"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"],"url":"https://github.com/matrix-org/synapse/security/advisories/GHSA-2hwx-mjrm-v3g8"},{"source":"af854a3a-2127-422b-91ae-364da2661108","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY/"}],"sourceIdentifier":"security-advisories@github.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-400"}],"source":"security-advisories@github.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-770"}],"source":"nvd@nist.gov","type":"Primary"}]}
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