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CVE-2023-42806

Estado: ModificadaMedia (6.5)—

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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Iohk — Hydra

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2023-42806",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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          "id": "CVE-2023-42806",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-09-24T14:29:01.242468Z"
        }
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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          "privilegesRequired": "HIGH",
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          "versions": [
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              "status": "affected",
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  "published": "2023-09-21T17:15:23.583",
  "references": [
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      "url": "https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a182c22bb/hydra-node/src/Hydra/HeadLogic.hs#L357",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-347"
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      ]
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  ],
  "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."
    }
  ],
  "lastModified": "2026-06-17T06:24:33.260",
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