WID-SEC-W-2023-2457

Vulnerability from csaf_certbund - Published: 2021-09-27 22:00 - Updated: 2023-09-27 22:00
Summary
Linux Kernel: Schwachstelle ermöglicht Denial of Service

Notes

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.
Produktbeschreibung
Der Kernel stellt den Kern des Linux Betriebssystems dar.
Angriff
Ein lokaler Angreifer kann eine Schwachstelle im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme
- Linux
To clipboard 

{
  "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 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 einen Denial of Service Angriff durchzuf\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-2023-2457 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2023-2457.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-2457 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-2457"
      },
      {
        "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": "Amazon Linux Security Advisory ALAS-2021-1719 vom 2021-11-04",
        "url": "https://alas.aws.amazon.com/AL2/ALAS-2021-1719.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Bugzilla - Bug 2005258 vom 2021-09-27",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2005258"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4648 vom 2021-11-15",
        "url": "https://access.redhat.com/errata/RHSA-2021:4648"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4647 vom 2021-11-15",
        "url": "https://access.redhat.com/errata/RHSA-2021:4647"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4650 vom 2021-11-15",
        "url": "https://access.redhat.com/errata/RHSA-2021:4650"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4646 vom 2021-11-15",
        "url": "https://access.redhat.com/errata/RHSA-2021:4646"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2021-4647 vom 2021-11-18",
        "url": "https://linux.oracle.com/errata/ELSA-2021-4647.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4875 vom 2021-11-30",
        "url": "https://access.redhat.com/errata/RHSA-2021:4875"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2021:4871 vom 2021-11-30",
        "url": "https://access.redhat.com/errata/RHSA-2021:4871"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-2843 vom 2021-12-16",
        "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html"
      },
      {
        "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": "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": "Ubuntu Security Notice USN-5343-1 vom 2022-03-22",
        "url": "https://ubuntu.com/security/notices/USN-5343-1"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9313 vom 2022-04-26",
        "url": "http://linux.oracle.com/errata/ELSA-2022-9313.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9314 vom 2022-04-26",
        "url": "http://linux.oracle.com/errata/ELSA-2022-9314.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9367 vom 2022-05-10",
        "url": "http://linux.oracle.com/errata/ELSA-2022-9367.html"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-9366 vom 2022-05-10",
        "url": "http://linux.oracle.com/errata/ELSA-2022-9366.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Linux Kernel: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2023-09-27T22:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:58:54.066+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
        }
      },
      "id": "WID-SEC-W-2023-2457",
      "initial_release_date": "2021-09-27T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2021-09-27T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2021-11-04T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2021-11-15T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2021-11-17T23:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2021-11-30T23:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2021-12-16T23:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2022-01-05T23:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2022-03-09T23:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2022-03-22T23:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2022-04-25T22:00:00.000+00:00",
          "number": "10",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2022-05-10T22:00:00.000+00:00",
          "number": "11",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2023-09-27T22:00:00.000+00:00",
          "number": "12",
          "summary": "Neue Updates von Amazon aufgenommen"
        }
      ],
      "status": "final",
      "version": "12"
    }
  },
  "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 \u003c 5.4-rc1",
            "product": {
              "name": "Open Source Linux Kernel \u003c 5.4-rc1",
              "product_id": "T020506",
              "product_identification_helper": {
                "cpe": "cpe:/o:linux:linux_kernel:5.4-rc1"
              }
            }
          }
        ],
        "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": "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-2021-20317",
      "notes": [
        {
          "category": "description",
          "text": "Es besteht eine Schwachstelle im Linux-Kernel aufgrund eines Fehlers in der Funktion \"timerqueue_add\" in [lib/timerqueue.c]. Ein lokaler Angreifer mit speziellen Benutzerrechten kann dies ausnutzen, um einen Denial of Service-Zustand auszul\u00f6sen."
        }
      ],
      "product_status": {
        "known_affected": [
          "2951",
          "67646",
          "T000126",
          "398363",
          "T004914"
        ]
      },
      "release_date": "2021-09-27T22:00:00.000+00:00",
      "title": "CVE-2021-20317"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.