{
  "GSD": {
    "alias": "CVE-2021-3995",
    "description": "A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows an unprivileged local attacker to unmount FUSE filesystems that belong to certain other users who have a UID that is a prefix of the UID of the attacker in its string form. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.",
    "id": "GSD-2021-3995",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-3995.html",
      "https://www.debian.org/security/2022/dsa-5055",
      "https://ubuntu.com/security/CVE-2021-3995",
      "https://advisories.mageia.org/CVE-2021-3995.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
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      ],
      "details": "A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows an unprivileged local attacker to unmount FUSE filesystems that belong to certain other users who have a UID that is a prefix of the UID of the attacker in its string form. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.",
      "id": "GSD-2021-3995",
      "modified": "2023-12-13T01:23:35.153805Z",
      "schema_version": "1.4.0"
    }
  },
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          }
        ]
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                "lang": "eng",
                "value": "CWE-552 - Files or Directories Accessible to External Parties"
              }
            ]
          }
        ]
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            "url": "https://github.com/util-linux/util-linux/commit/57202f5713afa2af20ffbb6ab5331481d0396f8d"
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            "name": "[oss-security] 20221130 Race condition in snap-confine\u0027s must_mkdir_and_open_with_perms() (CVE-2022-3328)",
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            "name": "20221208 Race condition in snap-confine\u0027s must_mkdir_and_open_with_perms() (CVE-2022-3328)",
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            "name": "https://security.netapp.com/advisory/ntap-20221209-0002/",
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          {
            "name": "GLSA-202401-08",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202401-08"
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        ]
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            "lang": "en",
            "value": "A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows an unprivileged local attacker to unmount FUSE filesystems that belong to certain other users who have a UID that is a prefix of the UID of the attacker in its string form. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems."
          },
          {
            "lang": "es",
            "value": "Se ha encontrado un error l\u00f3gico en la biblioteca libmount de util-linux en la funci\u00f3n que permite a un usuario no privilegiado desmontar un sistema de archivos FUSE. Este fallo permite a un atacante local no privilegiado desmontar sistemas de archivos FUSE que pertenecen a otros usuarios determinados que presentan un UID que es un prefijo del UID del atacante en su forma de cadena. Un atacante puede usar este fallo para causar una denegaci\u00f3n de servicio a las aplicaciones que usan los sistemas de archivos afectados."
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        "lastModified": "2024-01-07T09:15:08.413",
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                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
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                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
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        "published": "2022-08-23T20:15:08.493",
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{
  "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": "Die util-linux Pakete enthalten viele verschiedene low-level Systemwerkzeuge, welche  \tunerl\u00e4sslich f\u00fcr den Betrieb eines Linux Betriebssystems sind.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann mehrere Schwachstellen in util-linux 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 f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2022-0279 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2022-0279.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2022-0279 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2022-0279"
      },
      {
        "category": "external",
        "summary": "Seclists.org Security Advisory vom 2022-01-24",
        "url": "http://seclists.org/oss-sec/2022/q1/66"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory vom 2022-01-24",
        "url": "https://access.redhat.com/security/cve/cve-2021-3995"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory vom 2022-01-24",
        "url": "https://access.redhat.com/security/cve/cve-2021-3996"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DSA-5055 vom 2022-01-25",
        "url": "https://www.debian.org/security/2022/dsa-5055"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-5279-1 vom 2022-02-09",
        "url": "https://ubuntu.com/security/notices/USN-5279-1"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:0727-1 vom 2022-03-04",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-March/010364.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2022:0727-2 vom 2022-04-20",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2022-April/010762.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2022-2022-086 vom 2022-06-13",
        "url": "https://alas.aws.amazon.com/AL2022/ALAS-2022-086.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS-2022-099 vom 2022-07-21",
        "url": "https://alas.aws.amazon.com/AL2022/ALAS-2022-099.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS-2022-218 vom 2022-12-09",
        "url": "https://alas.aws.amazon.com/AL2022/ALAS-2022-218.html"
      },
      {
        "category": "external",
        "summary": "Gentoo Linux Security Advisory GLSA-202401-08 vom 2024-01-07",
        "url": "https://security.gentoo.org/glsa/202401-08"
      }
    ],
    "source_lang": "en-US",
    "title": "util-linux: Mehrere Schwachstellen erm\u00f6glichen Umgehen von Sicherheitsvorkehrungen",
    "tracking": {
      "current_release_date": "2024-01-07T23:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:27:48.304+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
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      "id": "WID-SEC-W-2022-0279",
      "initial_release_date": "2022-01-24T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2022-01-24T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2022-01-25T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2022-02-09T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2022-03-06T23:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2022-04-19T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2022-06-13T22:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2022-07-20T22:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2022-12-11T23:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von Amazon aufgenommen"
        },
        {
          "date": "2024-01-07T23:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von Gentoo aufgenommen"
        }
      ],
      "status": "final",
      "version": "9"
    }
  },
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      {
        "branches": [
          {
            "category": "product_name",
            "name": "Amazon Linux 2",
            "product": {
              "name": "Amazon Linux 2",
              "product_id": "398363",
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        "category": "vendor",
        "name": "Amazon"
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            "name": "Debian Linux",
            "product": {
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              "product_id": "2951",
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            "name": "Gentoo Linux",
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              "name": "Gentoo Linux",
              "product_id": "T012167",
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      },
      {
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            "category": "product_name",
            "name": "Open Source util-linux \u003c 2.37",
            "product": {
              "name": "Open Source util-linux \u003c 2.37",
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        "category": "vendor",
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      },
      {
        "branches": [
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            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T002207",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
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            }
          }
        ],
        "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"
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    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-3995",
      "notes": [
        {
          "category": "description",
          "text": "In util-linux existieren mehrere Schwachstellen. Der Fehler besteht in der libmount-Bibliothek und erm\u00f6glicht es einem Angreifer, FUSE-Dateisysteme unzumounten, die bestimmten anderen Benutzern geh\u00f6ren und er erm\u00f6glicht es einem Benutzer auf einem verwundbaren System, die Dateisysteme anderer Benutzer unzumounten, die entweder global beschreibbar sind oder in ein global beschreibbares Verzeichnis eingeh\u00e4ngt sind. Ein lokaler Angreifer kann diese Schwachstellen ausnutzen, um Sicherheitsma\u00dfnahmen zu umgehen."
        }
      ],
      "product_status": {
        "known_affected": [
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          "T002207",
          "T000126",
          "398363",
          "T012167"
        ]
      },
      "release_date": "2022-01-24T23:00:00.000+00:00",
      "title": "CVE-2021-3995"
    },
    {
      "cve": "CVE-2021-3996",
      "notes": [
        {
          "category": "description",
          "text": "In util-linux existieren mehrere Schwachstellen. Der Fehler besteht in der libmount-Bibliothek und erm\u00f6glicht es einem Angreifer, FUSE-Dateisysteme unzumounten, die bestimmten anderen Benutzern geh\u00f6ren und er erm\u00f6glicht es einem Benutzer auf einem verwundbaren System, die Dateisysteme anderer Benutzer unzumounten, die entweder global beschreibbar sind oder in ein global beschreibbares Verzeichnis eingeh\u00e4ngt sind. Ein lokaler Angreifer kann diese Schwachstellen ausnutzen, um Sicherheitsma\u00dfnahmen zu umgehen."
        }
      ],
      "product_status": {
        "known_affected": [
          "2951",
          "T002207",
          "T000126",
          "398363",
          "T012167"
        ]
      },
      "release_date": "2022-01-24T23:00:00.000+00:00",
      "title": "CVE-2021-3996"
    }
  ]
}