nvd-json-data-feeds/CVE-2025/CVE-2025-243xx/CVE-2025-24356.json

{
  "id": "CVE-2025-24356",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2025-01-27T18:15:41.347",
  "lastModified": "2025-01-27T18:15:41.347",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "fastd is a VPN daemon which tunnels IP packets and Ethernet frames over UDP. When receiving a data packet from an unknown IP address/port combination, fastd will assume that one of its connected peers has moved to a new address and initiate a reconnect by sending a handshake packet. This \"fast reconnect\" avoids having to wait for a session timeout (up to ~90s) until a new connection is established. Even a 1-byte UDP packet just containing the fastd packet type header can trigger a much larger handshake packet (~150 bytes of UDP payload). Including IPv4 and UDP headers, the resulting amplification factor is roughly 12-13. By sending data packets with a spoofed source address to fastd instances reachable on the internet, this amplification of UDP traffic might be used to facilitate a Distributed Denial of Service attack. This vulnerability is fixed in v23."
    },
    {
      "lang": "es",
      "value": "fastd es una VPN daemon que tuneliza paquetes IP y tramas Ethernet sobre UDP. Al recibir un paquete de datos de una combinaci\u00f3n desconocida de direcci\u00f3n IP/puerto, fastd asumir\u00e1 que uno de sus pares conectados se ha mudado a una nueva direcci\u00f3n e iniciar\u00e1 una reconexi\u00f3n enviando un paquete handshake. Esta \"reconexi\u00f3n r\u00e1pida\" evita tener que esperar a que se agote el tiempo de espera de la sesi\u00f3n (hasta ~90 s) hasta que se establezca una nueva conexi\u00f3n. Incluso un paquete UDP de 1 byte que solo contenga el encabezado de tipo de paquete fastd puede activar un paquete handshakee mucho m\u00e1s grande (~150 bytes de UDP payload). incluida IPv4 y encabezados UDP, el factor de amplificaci\u00f3n resultante es aproximadamente 12-13. Al enviar paquetes de datos con una direcci\u00f3n de origen falsificada a instancias de fastd accesibles en Internet, esta amplificaci\u00f3n del tr\u00e1fico UDP podr\u00eda usarse para facilitar un ataque de denegaci\u00f3n de servicio distribuido. Esta vulnerabilidad se corrigi\u00f3 en la v23."
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "security-advisories@github.com",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnerableSystemConfidentiality": "NONE",
          "vulnerableSystemIntegrity": "NONE",
          "vulnerableSystemAvailability": "NONE",
          "subsequentSystemConfidentiality": "NONE",
          "subsequentSystemIntegrity": "NONE",
          "subsequentSystemAvailability": "LOW",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirements": "NOT_DEFINED",
          "integrityRequirements": "NOT_DEFINED",
          "availabilityRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnerableSystemConfidentiality": "NOT_DEFINED",
          "modifiedVulnerableSystemIntegrity": "NOT_DEFINED",
          "modifiedVulnerableSystemAvailability": "NOT_DEFINED",
          "modifiedSubsequentSystemConfidentiality": "NOT_DEFINED",
          "modifiedSubsequentSystemIntegrity": "NOT_DEFINED",
          "modifiedSubsequentSystemAvailability": "NOT_DEFINED",
          "safety": "NOT_DEFINED",
          "automatable": "NOT_DEFINED",
          "recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "security-advisories@github.com",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-405"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/neocturne/fastd/commit/1f233bee76b722c0b3f9024f2c39c72e9f7e5843",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/neocturne/fastd/commit/3940150e801d0c91460491bec32cbcc5bbc89d5f",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/neocturne/fastd/commit/5f63fcfc18ae9cad023fa463b152d5e14192b5a8",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/neocturne/fastd/commit/9df7e516378441d2d17b89f9db5c27c8312d8f12",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/neocturne/fastd/commit/c1a07b3f2b9066c3713c68547da700b85d60f4f7",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/neocturne/fastd/commit/ce1b79b12dbfa796743b5f3a50789ade965b7023",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/neocturne/fastd/commit/d03a0a17347efb5293e42fde7d982781e90f14ef",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/neocturne/fastd/security/advisories/GHSA-pggg-vpfv-4rcv",
      "source": "security-advisories@github.com"
    }
  ]
}