{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "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 f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "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 seine Privilegien zu erweitern oder einen Denial of Service Zustand herbeizuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2022-0317 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2022-0317.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2022-0317 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2022-0317"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALASMICROVM-KERNEL-4.14-2023-001 vom 2023-09-27",
        "url": "https://alas.aws.amazon.com/AL2/ALASMICROVM-KERNEL-4.14-2023-001.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-6221-1 vom 2023-07-12",
        "url": "https://ubuntu.com/security/notices/USN-6221-1"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:1669-1 vom 2022-05-16",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-May/011018.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:1676-1 vom 2022-05-16",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-May/011024.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:1687-1 vom 2022-05-16",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-May/011033.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:1686-1 vom 2022-05-16",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-May/011035.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:1668-1 vom 2022-05-16",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-May/011019.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:2083-1 vom 2022-06-15",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-June/011291.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:2077-1 vom 2022-06-15",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-June/011285.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:2082-1 vom 2022-06-15",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-June/011287.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:5227 vom 2021-12-21",
        "url": "https://access.redhat.com/errata/RHSA-2021:5227"
      },
      {
        "category": "external",
        "summary": "Red Hat Bugzilla - Bug 2013242 vom 2021-12-21",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2013242"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:5241 vom 2021-12-21",
        "url": "https://access.redhat.com/errata/RHSA-2021:5241"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2021-5227 vom 2021-12-21",
        "url": "http://linux.oracle.com/errata/ELSA-2021-5227.html"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-2843",
        "url": "https://www.debian.org/lts/security/2021/dla-2843"
      },
      {
        "category": "external",
        "summary": "Arch Linux CVE-2021-20321",
        "url": "https://security.archlinux.org/CVE-2021-20321"
      },
      {
        "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-5208-1 vom 2022-01-06",
        "url": "https://ubuntu.com/security/notices/USN-5208-1"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-5209-1 vom 2022-01-06",
        "url": "https://ubuntu.com/security/notices/USN-5209-1"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2022:0043 vom 2022-01-10",
        "url": "https://access.redhat.com/errata/RHSA-2022:0043"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2022:0042 vom 2022-01-10",
        "url": "https://access.redhat.com/errata/RHSA-2022:0042"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2022:0044 vom 2022-01-10",
        "url": "https://access.redhat.com/errata/RHSA-2022:0044"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2022:0047 vom 2022-01-10",
        "url": "https://access.redhat.com/errata/RHSA-2022:0047"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-5218-1 vom 2022-01-11",
        "url": "https://ubuntu.com/security/notices/USN-5218-1"
      },
      {
        "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-5.10-2022-007 vom 2022-01-31",
        "url": "https://alas.aws.amazon.com/AL2/ALASKERNEL-5.10-2022-007.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9088 vom 2022-02-01",
        "url": "https://linux.oracle.com/errata/ELSA-2022-9088.html"
      },
      {
        "category": "external",
        "summary": "ORACLE OVMSA-2022-0007 vom 2022-02-17",
        "url": "https://oss.oracle.com/pipermail/oraclevm-errata/2022-February/001048.html"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-2941 vom 2022-03-09",
        "url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DSA-5096 vom 2022-03-09",
        "url": "https://lists.debian.org/debian-security-announce/2022/msg00063.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-2022:2103-1 vom 2022-06-16",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-June/011299.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-2022:1651-1 vom 2022-05-12",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-May/010994.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2KERNEL-5.4-2022-029 vom 2022-07-21",
        "url": "https://alas.aws.amazon.com/AL2/ALASKERNEL-5.4-2022-029.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2KERNEL-5.4-2022-027 vom 2022-07-21",
        "url": "https://alas.aws.amazon.com/AL2/ALASKERNEL-5.4-2022-027.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2KERNEL-5.4-2022-031 vom 2022-07-21",
        "url": "https://alas.aws.amazon.com/AL2/ALASKERNEL-5.4-2022-031.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Linux Kernel: Schwachstelle erm\u00f6glicht Privilegieneskalation",
    "tracking": {
      "current_release_date": "2023-09-27T22:00:00.000+00:00",
      "generator": {
        "date": "2024-02-15T16:48:20.676+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.0"
        }
      },
      "id": "WID-SEC-W-2022-0317",
      "initial_release_date": "2021-12-21T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2021-12-21T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2022-01-05T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2022-01-09T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2022-01-10T23:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Red Hat und Ubuntu aufgenommen"
        },
        {
          "date": "2022-01-12T23:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2022-01-30T23:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2022-02-01T23:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2022-02-16T23:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von ORACLE aufgenommen"
        },
        {
          "date": "2022-03-09T23:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2022-05-12T22:00:00.000+00:00",
          "number": "10",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2022-05-16T22:00:00.000+00:00",
          "number": "11",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2022-06-14T22:00:00.000+00:00",
          "number": "12",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2022-06-16T22:00:00.000+00:00",
          "number": "13",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2022-06-19T22:00:00.000+00:00",
          "number": "14",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2022-07-20T22:00:00.000+00:00",
          "number": "15",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2022-07-21T22:00:00.000+00:00",
          "number": "16",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2023-07-12T22:00:00.000+00:00",
          "number": "17",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2023-09-27T22:00:00.000+00:00",
          "number": "18",
          "summary": "Neue Updates von Amazon aufgenommen"
        }
      ],
      "status": "final",
      "version": "18"
    }
  },
  "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 Arch Linux",
            "product": {
              "name": "Open Source Arch Linux",
              "product_id": "T013312",
              "product_identification_helper": {
                "cpe": "cpe:/o:archlinux:archlinux:-"
              }
            }
          },
          {
            "category": "product_name",
            "name": "Open Source Linux Kernel",
            "product": {
              "name": "Open Source Linux Kernel",
              "product_id": "6368",
              "product_identification_helper": {
                "cpe": "cpe:/o:linux:linux_kernel:-"
              }
            }
          }
        ],
        "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-2021-20321",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle im Linux Kernel aufgrund einer Race Condition im \"overlayfs\" Dateisystemtreiber. Ein lokaler Angreifer, der auf ein eingeh\u00e4ngtes \"overlayfs\"-Dateisystem und das darunter liegende Verzeichnis zugreifen kann, kann dies ausnutzen, um seine Privilegien zu erweitern oder einen Denial of Service Zustand herbeizuf\u00fchren."
        }
      ],
      "product_status": {
        "known_affected": [
          "2951",
          "T002207",
          "67646",
          "6368",
          "T000126",
          "T013312",
          "398363",
          "T004914"
        ]
      },
      "release_date": "2021-12-21T23:00:00Z",
      "title": "CVE-2021-20321"
    }
  ]
}