{
  "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" : "Kerberos ist ein verteilter Netzwerkdienst zur Authentifizierung. MIT Kerberos ist die freie Implementierung des \"Kerberos network authentication protocol\", des Massachusetts Institute of Technology (MIT).",
      "title" : "Produktbeschreibung"
    }, {
      "category" : "summary",
      "text" : "Ein Angreifer kann mehrere Schwachstellen in MIT Kerberos ausnutzen, um einen Denial of Service Angriff durchzuführen.",
      "title" : "Angriff"
    }, {
      "category" : "general",
      "text" : "- Linux\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-2026-1290 - CSAF Version",
      "url" : "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1290.json"
    }, {
      "category" : "self",
      "summary" : "WID-SEC-2026-1290 - Portal Version",
      "url" : "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1290"
    }, {
      "category" : "external",
      "summary" : "Cem's Blog vom 2026-04-27 mit PoC",
      "url" : "https://cems.fun/2026/04/27/krb5-two-unauthenticated-network-vulnerabilities.html"
    }, {
      "category" : "external",
      "summary" : "OSS Security Mailing List vom 2026-04-27",
      "url" : "https://seclists.org/oss-sec/2026/q2/235"
    }, {
      "category" : "external",
      "summary" : "krb5 Fix vom 2026-04-27",
      "url" : "https://github.com/krb5/krb5/commit/2e75f0d9362fb979f5fc92829431a590a130929f"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-2026-2E9FE57A46 vom 2026-04-29",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-2026-2e9fe57a46"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-2026-8B43EA2F82 vom 2026-04-29",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-2026-8b43ea2f82"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-2026-6C99AAA6D3 vom 2026-04-29",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-2026-6c99aaa6d3"
    }, {
      "category" : "external",
      "summary" : "Fedora Security Advisory FEDORA-2026-684396998A vom 2026-04-29",
      "url" : "https://bodhi.fedoraproject.org/updates/FEDORA-2026-684396998a"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2026:12220 vom 2026-04-30",
      "url" : "https://access.redhat.com/errata/RHSA-2026:12220"
    }, {
      "category" : "external",
      "summary" : "openSUSE Security Update OPENSUSE-SU-2026:10729-1 vom 2026-05-11",
      "url" : "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/CGQDIGY7A2NYHA7RFMRH6ORESGTIUR7C/"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2026:16799 vom 2026-05-13",
      "url" : "https://access.redhat.com/errata/RHSA-2026:16799"
    }, {
      "category" : "external",
      "summary" : "Rocky Linux Security Advisory RLSA-2026:16799 vom 2026-05-14",
      "url" : "https://errata.build.resf.org/RLSA-2026:16799"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2026-16799 vom 2026-05-15",
      "url" : "http://linux.oracle.com/errata/ELSA-2026-16799.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2026:1816-1 vom 2026-05-13",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026022.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2026:21629-1 vom 2026-05-15",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026063.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2026:21618-1 vom 2026-05-15",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026073.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2026:21641-1 vom 2026-05-15",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026051.html"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2026:19357 vom 2026-05-20",
      "url" : "https://access.redhat.com/errata/RHSA-2026:19357"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2026:19145 vom 2026-05-19",
      "url" : "https://access.redhat.com/errata/RHSA-2026:19145"
    }, {
      "category" : "external",
      "summary" : "Debian Security Advisory DSA-6293 vom 2026-05-23",
      "url" : "https://security-tracker.debian.org/tracker/DSA-6293-1"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2026:17789 vom 2026-05-26",
      "url" : "https://access.redhat.com/errata/RHSA-2026:17789"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2026:21275 vom 2026-05-27",
      "url" : "https://access.redhat.com/errata/RHSA-2026:21275"
    }, {
      "category" : "external",
      "summary" : "Debian Security Advisory DLA-4603 vom 2026-05-28",
      "url" : "https://lists.debian.org/debian-lts-announce/2026/05/msg00047.html"
    } ],
    "source_lang" : "en-US",
    "title" : "MIT Kerberos: Mehrere Schwachstellen ermöglichen Denial of Service",
    "tracking" : {
      "current_release_date" : "2026-05-28T22:00:00.000+00:00",
      "generator" : {
        "date" : "2026-05-29T07:15:39.141+00:00",
        "engine" : {
          "name" : "BSI-WID",
          "version" : "1.6.0"
        }
      },
      "id" : "WID-SEC-W-2026-1290",
      "initial_release_date" : "2026-04-27T22:00:00.000+00:00",
      "revision_history" : [ {
        "date" : "2026-04-27T22:00:00.000+00:00",
        "number" : "1",
        "summary" : "Initiale Fassung"
      }, {
        "date" : "2026-04-29T22:00:00.000+00:00",
        "number" : "2",
        "summary" : "Neue Updates von Fedora aufgenommen"
      }, {
        "date" : "2026-05-03T22:00:00.000+00:00",
        "number" : "3",
        "summary" : "Neue Updates von Red Hat aufgenommen"
      }, {
        "date" : "2026-05-11T22:00:00.000+00:00",
        "number" : "4",
        "summary" : "Neue Updates von openSUSE aufgenommen"
      }, {
        "date" : "2026-05-12T22:00:00.000+00:00",
        "number" : "5",
        "summary" : "Neue Updates von Red Hat aufgenommen"
      }, {
        "date" : "2026-05-14T22:00:00.000+00:00",
        "number" : "6",
        "summary" : "Neue Updates von Rocky Enterprise Software Foundation, Oracle Linux und SUSE aufgenommen"
      }, {
        "date" : "2026-05-17T22:00:00.000+00:00",
        "number" : "7",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2026-05-19T22:00:00.000+00:00",
        "number" : "8",
        "summary" : "Neue Updates von Red Hat aufgenommen"
      }, {
        "date" : "2026-05-25T22:00:00.000+00:00",
        "number" : "9",
        "summary" : "Neue Updates von Debian und Red Hat aufgenommen"
      }, {
        "date" : "2026-05-27T22:00:00.000+00:00",
        "number" : "10",
        "summary" : "Neue Updates von Red Hat aufgenommen"
      }, {
        "date" : "2026-05-28T22:00:00.000+00:00",
        "number" : "11",
        "summary" : "Neue Updates von Debian aufgenommen"
      } ],
      "status" : "final",
      "version" : "11"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Debian Linux",
        "product" : {
          "name" : "Debian Linux",
          "product_id" : "T054613",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:debian:debian_linux:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Debian"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Fedora Linux",
        "product" : {
          "name" : "Fedora Linux",
          "product_id" : "74185",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:fedoraproject:fedora:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Fedora"
    }, {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_version_range",
          "name" : ">=1.18",
          "product" : {
            "name" : "MIT Kerberos >=1.18",
            "product_id" : "T053362"
          }
        }, {
          "category" : "product_version_range",
          "name" : ">=1.18",
          "product" : {
            "name" : "MIT Kerberos >=1.18",
            "product_id" : "T053362-fixed"
          }
        } ],
        "category" : "product_name",
        "name" : "Kerberos"
      } ],
      "category" : "vendor",
      "name" : "MIT"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Oracle Linux",
        "product" : {
          "name" : "Oracle Linux",
          "product_id" : "T004914",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:oracle:linux:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Oracle"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "RESF Rocky Linux",
        "product" : {
          "name" : "RESF Rocky Linux",
          "product_id" : "T032255",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:resf:rocky_linux:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "RESF"
    }, {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_name",
          "name" : "Red Hat Enterprise Linux",
          "product" : {
            "name" : "Red Hat Enterprise Linux",
            "product_id" : "67646",
            "product_identification_helper" : {
              "cpe" : "cpe:/o:redhat:enterprise_linux:-"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "Cryostat <4.2.0",
          "product" : {
            "name" : "Red Hat Enterprise Linux Cryostat <4.2.0",
            "product_id" : "T054651"
          }
        }, {
          "category" : "product_version",
          "name" : "Cryostat 4.2.0",
          "product" : {
            "name" : "Red Hat Enterprise Linux Cryostat 4.2.0",
            "product_id" : "T054651-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/o:redhat:enterprise_linux:cryostat__4.2.0"
            }
          }
        }, {
          "category" : "product_version",
          "name" : "Update Infrastructure 5.1",
          "product" : {
            "name" : "Red Hat Enterprise Linux Update Infrastructure 5.1",
            "product_id" : "T054761",
            "product_identification_helper" : {
              "cpe" : "cpe:/o:redhat:enterprise_linux:update_infrastructure_5.1"
            }
          }
        } ],
        "category" : "product_name",
        "name" : "Enterprise Linux"
      } ],
      "category" : "vendor",
      "name" : "Red Hat"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "SUSE Linux",
        "product" : {
          "name" : "SUSE Linux",
          "product_id" : "T002207",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:suse:suse_linux:-"
          }
        }
      }, {
        "category" : "product_name",
        "name" : "SUSE openSUSE",
        "product" : {
          "name" : "SUSE openSUSE",
          "product_id" : "T027843",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:suse:opensuse:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "SUSE"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2026-40355",
    "product_status" : {
      "known_affected" : [ "T054761", "T054651", "T002207", "67646", "T027843", "T054613", "T004914", "T032255", "74185" ]
    },
    "release_date" : "2026-04-27T22:00:00.000+00:00",
    "title" : "CVE-2026-40355"
  }, {
    "cve" : "CVE-2026-40356",
    "product_status" : {
      "known_affected" : [ "T054761", "T054651", "T002207", "67646", "T027843", "T054613", "T004914", "T032255", "74185" ]
    },
    "release_date" : "2026-04-27T22:00:00.000+00:00",
    "title" : "CVE-2026-40356"
  } ]
}