{
  "id": "CVE-2020-35680",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2020-12-24T16:15:15.600",
  "lastModified": "2023-11-07T03:22:01.627",
  "vulnStatus": "Modified",
  "descriptions": [
    {
      "lang": "en",
      "value": "smtpd/lka_filter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between the SMTP engine and the filters layer."
    },
    {
      "lang": "es",
      "value": "El archivo smtpd/lka_filter.c en OpenSMTPD versiones anteriores a 6.8.0p1, en determinadas configuraciones, permite a atacantes remotos causar una denegaci\u00f3n de servicio (desreferencia del puntero NULL y fallo del demonio) por medio de un patr\u00f3n dise\u00f1ado de actividad del cliente, porque la m\u00e1quina de estado del filtro no mantiene apropiadamente el canal de I/O entre el motor SMTP y la capa de filtros"
    }
  ],
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        "type": "Primary",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
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          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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  "weaknesses": [
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      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "CWE-476"
        }
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    }
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  "references": [
    {
      "url": "https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1",
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
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    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/",
      "source": "cve@mitre.org"
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    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/",
      "source": "cve@mitre.org"
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      "source": "cve@mitre.org",
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      "source": "cve@mitre.org",
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      "url": "https://www.mail-archive.com/misc%40opensmtpd.org/msg05188.html",
      "source": "cve@mitre.org"
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}