{
  "document" : {
    "aggregate_severity" : {
      "text" : "niedrig"
    },
    "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.\r\nRed Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution.\r\nOracle Linux ist ein Open Source Betriebssystem, welches unter der GNU General Public License (GPL) verfügbar ist.\r\nOracle VM ist eine Virtualisierungsplattform, die das Host Betriebssystem beinhaltet.",
      "title" : "Produktbeschreibung"
    }, {
      "category" : "summary",
      "text" : "Ein lokaler Angreifer kann eine Schwachstelle im Linux Kernel ausnutzen, um Sicherheitsvorkehrungen zu umgehen.",
      "title" : "Angriff"
    }, {
      "category" : "general",
      "text" : "- UNIX\n- Linux",
      "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-2023-0876 - CSAF Version",
      "url" : "https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2023-0876.json"
    }, {
      "category" : "self",
      "summary" : "WID-SEC-2023-0876 - Portal Version",
      "url" : "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-0876"
    }, {
      "category" : "external",
      "summary" : "Amazon Linux Security Advisory ALASMICROVM-KERNEL-4.14-2023-002 vom 2023-09-27",
      "url" : "https://alas.aws.amazon.com/AL2/ALASMICROVM-KERNEL-4.14-2023-002.html"
    }, {
      "category" : "external",
      "summary" : "Amazon Linux Security Advisory ALASMICROVM-KERNEL-4.14-2023-003 vom 2023-09-27",
      "url" : "https://alas.aws.amazon.com/AL2/ALASMICROVM-KERNEL-4.14-2023-003.html"
    }, {
      "category" : "external",
      "summary" : "Ubuntu Security Notice USN-6001-1 vom 2023-04-06",
      "url" : "https://ubuntu.com/security/notices/USN-6001-1"
    }, {
      "category" : "external",
      "summary" : "Oracle Security Advisory vom 2021-12-06",
      "url" : "http://linux.oracle.com/errata/ELSA-2021-9577.html"
    }, {
      "category" : "external",
      "summary" : "Oracle Security Advisory vom 2021-12-06",
      "url" : "https://oss.oracle.com/pipermail/oraclevm-errata/2021-December/001039.html"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory vom 2021-12-06",
      "url" : "https://access.redhat.com/security/cve/cve-2021-3732"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory vom 2021-12-06",
      "url" : "https://access.redhat.com/errata/RHSA-2021:4140"
    }, {
      "category" : "external",
      "summary" : "Red Hat Security Advisory vom 2021-12-06",
      "url" : "https://access.redhat.com/errata/RHSA-2021:4356"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2021:3969-1 vom 2021-12-07",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2021-December/009871.html"
    }, {
      "category" : "external",
      "summary" : "SUSE Security Update SUSE-SU-2021:3972-1 vom 2021-12-08",
      "url" : "https://lists.suse.com/pipermail/sle-security-updates/2021-December/009872.html"
    }, {
      "category" : "external",
      "summary" : "Debian Security Advisory DLA-2843 vom 2021-12-16",
      "url" : "https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html"
    } ],
    "source_lang" : "en-US",
    "title" : "Linux Kernel: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen",
    "tracking" : {
      "current_release_date" : "2023-09-27T22:00:00.000+00:00",
      "generator" : {
        "date" : "2024-08-15T17:48:14.826+00:00",
        "engine" : {
          "name" : "BSI-WID",
          "version" : "1.3.5"
        }
      },
      "id" : "WID-SEC-W-2023-0876",
      "initial_release_date" : "2021-12-06T23:00:00.000+00:00",
      "revision_history" : [ {
        "date" : "2021-12-06T23:00:00.000+00:00",
        "number" : "1",
        "summary" : "Initiale Fassung"
      }, {
        "date" : "2021-12-07T23:00:00.000+00:00",
        "number" : "2",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2021-12-08T23:00:00.000+00:00",
        "number" : "3",
        "summary" : "Neue Updates von SUSE aufgenommen"
      }, {
        "date" : "2021-12-16T23:00:00.000+00:00",
        "number" : "4",
        "summary" : "Neue Updates von Debian aufgenommen"
      }, {
        "date" : "2023-04-05T22:00:00.000+00:00",
        "number" : "5",
        "summary" : "Neue Updates von Ubuntu aufgenommen"
      }, {
        "date" : "2023-09-27T22:00:00.000+00:00",
        "number" : "6",
        "summary" : "Neue Updates von Amazon aufgenommen"
      } ],
      "status" : "final",
      "version" : "6"
    }
  },
  "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" : "Debian Linux",
        "product" : {
          "name" : "Debian Linux",
          "product_id" : "2951",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:debian:debian_linux:-"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Debian"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Open Source Linux Kernel < 5.14 rc6",
        "product" : {
          "name" : "Open Source Linux Kernel < 5.14 rc6",
          "product_id" : "T021170",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:linux:linux_kernel:5.14_rc6"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Open Source"
    }, {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_name",
          "name" : "Oracle Linux 7",
          "product" : {
            "name" : "Oracle Linux 7",
            "product_id" : "287065",
            "product_identification_helper" : {
              "cpe" : "cpe:/o:oracle:linux:7"
            }
          }
        }, {
          "category" : "product_name",
          "name" : "Oracle Linux 6",
          "product" : {
            "name" : "Oracle Linux 6",
            "product_id" : "T002988",
            "product_identification_helper" : {
              "cpe" : "cpe:/o:oracle:linux:6"
            }
          }
        } ],
        "category" : "product_name",
        "name" : "Linux"
      }, {
        "category" : "product_name",
        "name" : "Oracle VM 3",
        "product" : {
          "name" : "Oracle VM 3",
          "product_id" : "T019617",
          "product_identification_helper" : {
            "cpe" : "cpe:/a:oracle:vm:3"
          }
        }
      } ],
      "category" : "vendor",
      "name" : "Oracle"
    }, {
      "branches" : [ {
        "category" : "product_name",
        "name" : "Red Hat Enterprise Linux 8",
        "product" : {
          "name" : "Red Hat Enterprise Linux 8",
          "product_id" : "T014111",
          "product_identification_helper" : {
            "cpe" : "cpe:/o:redhat:enterprise_linux:8"
          }
        }
      } ],
      "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-2021-3732",
    "notes" : [ {
      "category" : "description",
      "text" : "Es existiert eine Schwachstelle im Linux-Kernel. Der Fehler besteht im OverlayFS-Subsystem aufgrund eines Fehlers beim Einhängen des TmpFS-Dateisystems mit OverlayFS. Ein lokaler Angreifer kann diese Schwachstelle ausnutzen, um Sicherheitsmaßnahmen zu umgehen und Zugriff auf versteckte Dateien zu erhalten, die nicht zugänglich sein sollten."
    } ],
    "product_status" : {
      "known_affected" : [ "2951", "T002207", "T000126", "T019617", "398363", "T002988", "T014111", "287065" ]
    },
    "release_date" : "2021-12-06T23:00:00.000+00:00",
    "title" : "CVE-2021-3732"
  } ]
}