{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-09T12:59:43.801","vulnerabilities":[{"cve":{"id":"CVE-2023-42806","sourceIdentifier":"security-advisories@github.com","published":"2023-09-21T17:15:23.583","lastModified":"2024-11-21T08:23:11.767","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Hydra is the layer-two scalability solution for Cardano. Prior to version 0.13.0, not signing and verifying `$\\mathsf{cid}$` allows an attacker (which must be a participant of this head) to use a snapshot from an old head instance with the same participants to close the head or contest the state with it. This can lead to an incorrect distribution of value (= value extraction attack; hard, but possible) or prevent the head to finalize because the value available is not consistent with the closed utxo state (= denial of service; easy). A patch is planned for version 0.13.0. As a workaround, rotate keys between heads so not to re-use keys and not result in the same multi-signature participants."},{"lang":"es","value":" Hydra es the layer-two scalability solution para Cardano. Antes de la versión 0.13.0, no firmar ni verificar `$\\mathsf{cid}$` permite que un atacante (que debe ser un participante de este encabezado) use una instantánea de una instancia principal anterior con los mismos participantes para cerrar el encabezado o disputar al Estado. Esto puede llevar a una distribución incorrecta del valor (= ataque de extracción de valor; difícil, pero posible) o impedir que la cabeza finalice porque el valor disponible no es consistente con el estado utxo cerrado (= denegación de servicio; fácil). Está previsto un parche para la versión 0.13.0. Como workaround, rote las claves entre los cabezales para no reutilizarlas y no generar los mismos participantes con firmas múltiples."}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.2,"impactScore":5.2},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.2,"impactScore":5.2}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-347"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:iohk:hydra:*:*:*:*:*:*:*:*","versionEndExcluding":"0.13.0","matchCriteriaId":"556BF21B-9F61-4C1D-BD51-A2EC64EA1CE7"}]}]}],"references":[{"url":"https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a182c22bb/hydra-node/src/Hydra/HeadLogic.hs#L357","source":"security-advisories@github.com","tags":["Product"]},{"url":"https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a182c22bb/hydra-node/src/Hydra/Snapshot.hs#L50-L54","source":"security-advisories@github.com","tags":["Product"]},{"url":"https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a182c22bb/hydra-plutus/src/Hydra/Contract/Head.hs#L583-L599","source":"security-advisories@github.com","tags":["Product"]},{"url":"https://github.com/input-output-hk/hydra/security/advisories/GHSA-gr36-mc6v-72qq","source":"security-advisories@github.com","tags":["Vendor Advisory"]},{"url":"https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a182c22bb/hydra-node/src/Hydra/HeadLogic.hs#L357","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Product"]},{"url":"https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a182c22bb/hydra-node/src/Hydra/Snapshot.hs#L50-L54","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Product"]},{"url":"https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a182c22bb/hydra-plutus/src/Hydra/Contract/Head.hs#L583-L599","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Product"]},{"url":"https://github.com/input-output-hk/hydra/security/advisories/GHSA-gr36-mc6v-72qq","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}