{
  "id": "CVE-2020-17469",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2020-12-11T23:15:13.683",
  "lastModified": "2024-11-21T05:08:10.583",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in FNET through 4.6.4. The code for IPv6 fragment reassembly tries to access a previous fragment starting from a network incoming fragment that still doesn't have a reference to the previous one (which supposedly resides in the reassembly list). When faced with an incoming fragment that belongs to a non-empty fragment list, IPv6 reassembly must check that there are no empty holes between the fragments: this leads to an uninitialized pointer dereference in _fnet_ip6_reassembly in fnet_ip6.c, and causes Denial-of-Service."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en FNET versiones hasta 4.6.4. El c\u00f3digo para el reensamblaje de fragmentos IPv6 intenta acceder a un fragmento anterior a partir de un fragmento entrante de red que a\u00fan no cuenta con una referencia al anterior (que supuestamente reside en la lista de reensamblado). Cuando se enfrenta a un fragmento entrante que pertenece a una lista de fragmentos no vac\u00edos, el reensamblaje de IPv6 debe comprobar que no haya huecos vac\u00edos entre los fragmentos: esto conlleva a una desreferencia del puntero no inicializado en la funci\u00f3n _fnet_ip6_reassembly en el archivo fnet_ip6.c, y causa una Denegaci\u00f3n de Servicio"
    }
  ],
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        "type": "Primary",
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          "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"
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        "exploitabilityScore": 3.9,
        "impactScore": 3.6
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          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL"
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
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        "acInsufInfo": false,
        "obtainAllPrivilege": false,
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  "weaknesses": [
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  "references": [
    {
      "url": "http://fnet.sourceforge.net/manual/fnet_history.html",
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