{
  "document" : {
    "aggregate_severity" : {
      "text" : "mittel"
    },
    "category" : "csaf_base",
    "csaf_version" : "2.0",
    "distribution" : {
      "tlp" : {
        "label" : "WHITE",
        "url" : "https://www.first.org/tlp/"
      }
    },
    "lang" : "de-DE",
    "notes" : [ {
      "category" : "legal_disclaimer",
      "text" : "Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen."
    }, {
      "category" : "description",
      "text" : "Transport Layer Security (TLS) ist ein hybrides Verschlüsselungsprotokoll zur Datenübertragung im Internet.",
      "title" : "Produktbeschreibung"
    }, {
      "category" : "summary",
      "text" : "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in verschiedenen TLS Implementierungen ausnutzen, um einen Denial of Service Angriff durchzuführen.",
      "title" : "Angriff"
    }, {
      "category" : "general",
      "text" : "- Linux\n- Sonstiges\n- UNIX\n- Windows",
      "title" : "Betroffene Betriebssysteme"
    } ],
    "publisher" : {
      "category" : "other",
      "contact_details" : "csaf-provider@cert-bund.de",
      "name" : "Bundesamt für Sicherheit in der Informationstechnik",
      "namespace" : "https://www.bsi.bund.de"
    },
    "references" : [ {
      "category" : "self",
      "summary" : "WID-SEC-W-2023-1352 - CSAF Version",
      "url" : "https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2023-1352.json"
    }, {
      "category" : "self",
      "summary" : "WID-SEC-2023-1352 - Portal Version",
      "url" : "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-1352"
    }, {
      "category" : "external",
      "summary" : "D(HE)ater proof of concept vom 2021-12-06",
      "url" : "https://github.com/Balasys/dheater"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Alert on DHEater aka CVE-2002-20001 vom 2021-12-07",
      "url" : "https://www.suse.com/support/kb/doc/?id=000020510"
    }, {
      "category" : "external",
      "summary" : "F5 Security Advisory K83120834 vom 2023-06-02",
      "url" : "https://my.f5.com/manage/s/article/K83120834"
    }, {
      "category" : "external",
      "summary" : "WatchGuard Security Advisory WGSA-2024-00008 vom 2024-04-22",
      "url" : "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2024-00008"
    }, {
      "category" : "external",
      "summary" : "Moxa Security Advisory MPSA-259471 vom 2025-12-15",
      "url" : "https://www.moxa.com/en/support/product-support/security-advisory/mpsa-259471-security-enhancement-ssh-weak-algorithms-supported"
    } ],
    "source_lang" : "en-US",
    "title" : "TLS Implementierungen: Schwachstelle ermöglicht Denial of Service",
    "tracking" : {
      "current_release_date" : "2025-12-14T23:00:00.000+00:00",
      "generator" : {
        "date" : "2025-12-15T10:50:02.069+00:00",
        "engine" : {
          "name" : "BSI-WID",
          "version" : "1.5.0"
        }
      },
      "id" : "WID-SEC-W-2023-1352",
      "initial_release_date" : "2021-12-13T23:00:00.000+00:00",
      "revision_history" : [ {
        "date" : "2021-12-13T23:00:00.000+00:00",
        "number" : "1",
        "summary" : "Initiale Fassung"
      }, {
        "date" : "2023-06-04T22:00:00.000+00:00",
        "number" : "2",
        "summary" : "Neue Updates von F5 aufgenommen"
      }, {
        "date" : "2024-04-22T22:00:00.000+00:00",
        "number" : "3",
        "summary" : "Neue Updates von WatchGuard aufgenommen"
      }, {
        "date" : "2025-12-14T23:00:00.000+00:00",
        "number" : "4",
        "summary" : "Neue Updates von moxa aufgenommen"
      } ],
      "status" : "final",
      "version" : "4"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Apache HTTP Server",
        "product" : {
          "name" : "Apache HTTP Server",
          "product_id" : "67869",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:apache:http_server:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Apache"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "F5 BIG-IP",
        "product" : {
          "name" : "F5 BIG-IP",
          "product_id" : "T001663",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:f5:big-ip:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "F5"
    }, {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_version_range",
          "name" : "EDS-510E <5.7.4",
          "product" : {
            "name" : "Moxa Switch EDS-510E <5.7.4",
            "product_id" : "T049408"
          }
        }, {
          "category" : "product_version",
          "name" : "EDS-510E 5.7.4",
          "product" : {
            "name" : "Moxa Switch EDS-510E 5.7.4",
            "product_id" : "T049408-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/h:moxa:switch:eds-510e__5.7.4"
            }
          }
        } ],
        "category" : "product_name",
        "name" : "Switch"
      } ],
      "category" : "vendor",
      "name" : "Moxa"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "NGINX NGINX",
        "product" : {
          "name" : "NGINX NGINX",
          "product_id" : "T014143",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:nginx:nginx:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "NGINX"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Open Source OpenSSH",
        "product" : {
          "name" : "Open Source OpenSSH",
          "product_id" : "8223",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:openbsd:openssh:-"
          }
        }
      }, {
        "category" : "product_name",
        "name" : "Open Source OpenSSL",
        "product" : {
          "name" : "Open Source OpenSSL",
          "product_id" : "8269",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:openssl:openssl:-"
          }
        }
      }, {
        "category" : "product_name",
        "name" : "Open Source Postfix",
        "product" : {
          "name" : "Open Source Postfix",
          "product_id" : "T004032",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:postfix:postfix:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Open Source"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "SUSE Linux",
        "product" : {
          "name" : "SUSE Linux",
          "product_id" : "T002207",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:suse:suse_linux:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "SUSE"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Specification TLS",
        "product" : {
          "name" : "Specification TLS",
          "product_id" : "T004212",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:open_source:tls1:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Specification"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "WatchGuard Firebox",
        "product" : {
          "name" : "WatchGuard Firebox",
          "product_id" : "T034346",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:watchguard:firebox:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "WatchGuard"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2002-20001",
    "product_status" : {
      "known_affected" : [ "T049408", "8223", "T004212", "T034346", "T002207", "8269", "67869", "T001663", "T004032", "T014143" ]
    },
    "release_date" : "2021-12-13T23:00:00.000+00:00",
    "title" : "CVE-2002-20001"
  } ]
}