{
  "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" : "Der Kernel stellt den Kern des Linux Betriebssystems dar.",
      "title" : "Produktbeschreibung"
    }, {
      "category" : "summary",
      "text" : "Ein lokaler Angreifer kann eine Schwachstelle im Linux Kernel ausnutzen, um Sicherheitsvorkehrungen zu umgehen.",
      "title" : "Angriff"
    }, {
      "category" : "general",
      "text" : "- Linux\n- Applicance",
      "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-2022-0340 - CSAF Version",
      "url" : "https://wid.cert-bund.de/.well-known/csaf/white/2020/wid-sec-w-2022-0340.json"
    }, {
      "category" : "self",
      "summary" : "WID-SEC-2022-0340 - Portal Version",
      "url" : "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2022-0340"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:4611-1 vom 2022-12-23",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-December/013341.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:4561-1 vom 2022-12-19",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-December/013272.html"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2022-9999 vom 2022-11-16",
      "url" : "http://linux.oracle.com/errata/ELSA-2022-9999.html"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2021-9141 vom 2021-04-01",
      "url" : "http://linux.oracle.com/errata/ELSA-2021-9141.html"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2021-9140 vom 2021-04-01",
      "url" : "http://linux.oracle.com/errata/ELSA-2021-9140.html"
    }, {
      "category" : "external",
      "summary" : "NIST Vulnerability Database vom 2020-10-04",
      "url" : "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-26541"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2020-5912 vom 2020-11-06",
      "url" : "http://linux.oracle.com/errata/ELSA-2020-5912.html"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2020-5913 vom 2020-11-10",
      "url" : "https://linux.oracle.com/errata/ELSA-2020-5913.html"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2020-5923 vom 2020-11-12",
      "url" : "https://linux.oracle.com/errata/ELSA-2020-5923.html"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2020-5924 vom 2020-11-12",
      "url" : "https://linux.oracle.com/errata/ELSA-2020-5924.html"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2020-5956 vom 2020-12-02",
      "url" : "http://linux.oracle.com/errata/ELSA-2020-5956.html"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2021:2570 vom 2021-06-29",
      "url" : "https://access.redhat.com/errata/RHSA-2021:2570"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2021:2599 vom 2021-06-29",
      "url" : "https://access.redhat.com/errata/RHSA-2021:2599"
    }, {
      "category" : "external",
      "summary" : "Oracle Linux Security Advisory ELSA-2021-2570 vom 2021-07-01",
      "url" : "https://linux.oracle.com/errata/ELSA-2021-2570.html"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2021:2666 vom 2021-07-07",
      "url" : "https://access.redhat.com/errata/RHSA-2021:2666"
    }, {
      "category" : "external",
      "summary" : "Ubuntu Security Notice USN-5120-1 vom 2021-10-22",
      "url" : "https://ubuntu.com/security/notices/USN-5120-1"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2021:2719 vom 2021-07-20",
      "url" : "https://access.redhat.com/errata/RHSA-2021:2719"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory RHSA-2021:2718 vom 2021-07-21",
      "url" : "https://access.redhat.com/errata/RHSA-2021:2718"
    }, {
      "category" : "external",
      "summary" : "AVAYA Security Advisory ASA-2021-099 vom 2021-08-25",
      "url" : "https://downloads.avaya.com/css/P8/documents/101077235"
    }, {
      "category" : "external",
      "summary" : "Ubuntu Security Notice USN-5070-1 vom 2021-09-09",
      "url" : "https://ubuntu.com/security/notices/USN-5070-1"
    }, {
      "category" : "external",
      "summary" : "Ubuntu Security Notice USN-5106-1 vom 2021-10-06",
      "url" : "https://ubuntu.com/security/notices/USN-5106-1"
    }, {
      "category" : "external",
      "summary" : "Ubuntu Security Notice USN-5210-1 vom 2022-01-06",
      "url" : "https://ubuntu.com/security/notices/USN-5210-1"
    }, {
      "category" : "external",
      "summary" : "Ubuntu Security Notice USN-5210-2 vom 2022-01-12",
      "url" : "https://ubuntu.com/security/notices/USN-5210-2"
    }, {
      "category" : "external",
      "summary" : "Amazon Linux Security Advisory ALASKERNEL-5.10-2022-002 vom 2022-01-31",
      "url" : "https://alas.aws.amazon.com/AL2/ALASKERNEL-5.10-2022-002.html"
    }, {
      "category" : "external",
      "summary" : "Amazon Linux Security Advisory ALASKERNEL-5.4-2022-004 vom 2022-01-31",
      "url" : "https://alas.aws.amazon.com/AL2/ALASKERNEL-5.4-2022-004.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2111-1 vom 2022-06-17",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-June/011310.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2104-1 vom 2022-06-16",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-June/011302.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2172-1 vom 2022-06-24",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-June/011346.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2173-1 vom 2022-06-24",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-June/011347.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2177-1 vom 2022-06-24",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-June/011353.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2377-1 vom 2022-07-13",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-July/011520.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2382-1 vom 2022-07-13",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-July/011539.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2393-1 vom 2022-07-14",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-July/011546.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2407-1 vom 2022-07-15",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-July/011557.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2022:2629-1 vom 2022-08-02",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2022-August/011744.html"
    }, {
      "category" : "external",
      "summary" : "Dell Security Advisory DSA-2022-266 vom 2022-09-21",
      "url" : "https://www.dell.com/support/kbdoc/000203560/dsa-2022-266-dell-networker-vproxy-security-update-for-multiple-third-party-vulnerabilities"
    } ],
    "source_lang" : "en-US",
    "title" : "Linux Kernel: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen",
    "tracking" : {
      "current_release_date" : "2022-12-26T23:00:00.000+00:00",
      "generator" : {
        "date" : "2024-08-15T17:28:21.991+00:00",
        "engine" : {
          "name" : "BSI-WID",
          "version" : "1.3.5"
        }
      },
      "id" : "WID-SEC-W-2022-0340",
      "initial_release_date" : "2020-10-04T22:00:00.000+00:00",
      "revision_history" : [ {
        "date" : "2020-10-04T22:00:00.000+00:00",
        "number" : "1",
        "summary" : "Initiale Fassung"
      }, {
        "date" : "2020-11-05T23:00:00.000+00:00",
        "number" : "2",
        "summary" : "Neue Updates von Oracle Linux aufgenommen"
      }, {
        "date" : "2020-11-10T23:00:00.000+00:00",
        "number" : "3",
        "summary" : "Neue Updates von Oracle Linux aufgenommen"
      }, {
        "date" : "2020-11-12T23:00:00.000+00:00",
        "number" : "4",
        "summary" : "Neue Updates von Oracle Linux aufgenommen"
      }, {
        "date" : "2020-12-01T23:00:00.000+00:00",
        "number" : "5",
        "summary" : "Neue Updates von Oracle Linux aufgenommen"
      }, {
        "date" : "2021-03-31T22:00:00.000+00:00",
        "number" : "6",
        "summary" : "Neue Updates von Oracle Linux aufgenommen"
      }, {
        "date" : "2021-06-29T22:00:00.000+00:00",
        "number" : "7",
        "summary" : "Neue Updates von Red Hat aufgenommen"
      }, {
        "date" : "2021-06-30T22:00:00.000+00:00",
        "number" : "8",
        "summary" : "Neue Updates von Oracle Linux aufgenommen"
      }, {
        "date" : "2021-07-07T22:00:00.000+00:00",
        "number" : "9",
        "summary" : "Neue Updates von Red Hat aufgenommen"
      }, {
        "date" : "2021-07-20T22:00:00.000+00:00",
        "number" : "10",
        "summary" : "Neue Updates von Red Hat aufgenommen"
      }, {
        "date" : "2021-08-26T22:00:00.000+00:00",
        "number" : "11",
        "summary" : "Neue Updates von AVAYA aufgenommen"
      }, {
        "date" : "2021-09-08T22:00:00.000+00:00",
        "number" : "12",
        "summary" : "Neue Updates von Ubuntu aufgenommen"
      }, {
        "date" : "2021-10-06T22:00:00.000+00:00",
        "number" : "13",
        "summary" : "Neue Updates von Ubuntu aufgenommen"
      }, {
        "date" : "2021-10-21T22:00:00.000+00:00",
        "number" : "14",
        "summary" : "Neue Updates von Ubuntu aufgenommen"
      }, {
        "date" : "2022-01-05T23:00:00.000+00:00",
        "number" : "15",
        "summary" : "Neue Updates von Ubuntu aufgenommen"
      }, {
        "date" : "2022-01-12T23:00:00.000+00:00",
        "number" : "16",
        "summary" : "Neue Updates von Ubuntu aufgenommen"
      }, {
        "date" : "2022-01-30T23:00:00.000+00:00",
        "number" : "17",
        "summary" : "Neue Updates von Amazon aufgenommen"
      }, {
        "date" : "2022-06-16T22:00:00.000+00:00",
        "number" : "18",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2022-06-19T22:00:00.000+00:00",
        "number" : "19",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2022-06-26T22:00:00.000+00:00",
        "number" : "20",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2022-07-12T22:00:00.000+00:00",
        "number" : "21",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2022-07-13T22:00:00.000+00:00",
        "number" : "22",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2022-07-14T22:00:00.000+00:00",
        "number" : "23",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2022-07-17T22:00:00.000+00:00",
        "number" : "24",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2022-08-02T22:00:00.000+00:00",
        "number" : "25",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2022-09-20T22:00:00.000+00:00",
        "number" : "26",
        "summary" : "Neue Updates von Dell aufgenommen"
      }, {
        "date" : "2022-11-16T23:00:00.000+00:00",
        "number" : "27",
        "summary" : "Neue Updates von Oracle Linux aufgenommen"
      }, {
        "date" : "2022-12-19T23:00:00.000+00:00",
        "number" : "28",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2022-12-26T23:00:00.000+00:00",
        "number" : "29",
        "summary" : "Neue Updates von SUSE aufgenommen"
      } ],
      "status" : "final",
      "version" : "29"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Amazon Linux 2",
        "product" : {
          "name" : "Amazon Linux 2",
          "product_id" : "398363",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:amazon:linux_2:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Amazon"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Avaya Aura Experience Portal",
        "product" : {
          "name" : "Avaya Aura Experience Portal",
          "product_id" : "T015519",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:avaya:aura_experience_portal:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Avaya"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Dell NetWorker",
        "product" : {
          "name" : "Dell NetWorker",
          "product_id" : "T024663",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:dell:networker:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Dell"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Open Source Linux Kernel <= 5.8.13",
        "product" : {
          "name" : "Open Source Linux Kernel <= 5.8.13",
          "product_id" : "T017414",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:linux:linux_kernel:5.8.13"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Open Source"
    }, {
      "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" : "Red Hat Enterprise Linux",
        "product" : {
          "name" : "Red Hat Enterprise Linux",
          "product_id" : "67646",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:redhat: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" : "vendor",
      "name" : "SUSE"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Ubuntu Linux",
        "product" : {
          "name" : "Ubuntu Linux",
          "product_id" : "T000126",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:canonical:ubuntu_linux:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Ubuntu"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2020-26541",
    "notes" : [ {
      "category" : "description",
      "text" : "Es existiert eine Schwachstelle im Linux Kernel. Der Schutzmechanismus der Secure Boot Forbidden Signature Database (aka dbx) wird nicht ordnungsgemäß durchgesetzt. Dies betrifft certs/blacklist.c und certs/system_keyring.c. Ein privilegierter Angreifer kann diese Schwachstelle ausnutzen, um Sicherheitsvorkehrungen zu umgehen."
    } ],
    "product_status" : {
      "known_affected" : [ "T015519", "T002207", "67646", "T000126", "T024663", "398363", "T004914" ],
      "last_affected" : [ "T017414" ]
    },
    "release_date" : "2020-10-04T22:00:00.000+00:00",
    "title" : "CVE-2020-26541"
  } ]
}