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CVE-2011-0543 (GCVE-0-2011-0543)

Vulnerability from cvelistv5 – Published: 2011-09-02 23:00 – Updated: 2024-08-06 21:58
VLAI
Summary
Certain legacy functionality in fusermount in fuse 2.8.5 and earlier, when util-linux does not support the --no-canonicalize option, allows local users to bypass intended access restrictions and unmount arbitrary directories via a symlink attack.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
References
Date Public
2011-01-31 00:00
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                    "matchCriteriaId": "3168CEE0-DCB6-48DC-B1A1-A7A24E0D4455",
                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "553EBB29-A227-428F-A752-BDFB100C954D",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:fuse:fuse:2.7.3:*:*:*:*:*:*:*",
                    "matchCriteriaId": "55859957-F60A-452F-B41F-1C08ABA073A0",
                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "7E20A7A1-54C5-427C-8232-E4E8CCB16AC4",
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                  },
                  {
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                    "matchCriteriaId": "43BCF81C-3331-4298-AA82-EDC61155F60A",
                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "7C8B55A7-2466-42AA-A14F-23931BC09904",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:fuse:fuse:2.8.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "87529BC7-BE88-4EF6-9B30-01345B1F1EE8",
                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "2937E05D-CEEC-4048-9151-575BD71CDD6F",
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                  },
                  {
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                    "matchCriteriaId": "C3DCC2C7-1BC7-43D6-8AE8-717E4D834131",
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                  },
                  {
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                  },
                  {
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                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Certain legacy functionality in fusermount in fuse 2.8.5 and earlier, when util-linux does not support the --no-canonicalize option, allows local users to bypass intended access restrictions and unmount arbitrary directories via a symlink attack."
          },
          {
            "lang": "es",
            "value": "Cierta funcionalidad en Fusermount en fuse v2.8.5 y anteriores, cuando util-linux no es compatible con la opci\u00f3n --no-canonicalize, permite a usuarios locales eludir restricciones de acceso y desmontar directorios de su elecci\u00f3n mediante un ataque de enlaces simb\u00f3licos."
          }
        ],
        "id": "CVE-2011-0543",
        "lastModified": "2026-04-29T01:13:23.040",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 3.3,
                "confidentialityImpact": "NONE",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:L/AC:M/Au:N/C:N/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 3.4,
              "impactScore": 4.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ]
        },
        "published": "2011-09-02T23:55:02.320",
        "references": [
          {
            "source": "secalert@redhat.com",
            "url": "http://fuse.git.sourceforge.net/git/gitweb.cgi?p=fuse/fuse%3Ba=commit%3Bh=cbd3a2a84068aae6e3fe32939d88470d712dbf47"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Patch"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2011/02/02/2"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Patch"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2011/02/03/5"
          },
          {
            "source": "secalert@redhat.com",
            "tags": [
              "Patch"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2011/02/08/4"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://fuse.git.sourceforge.net/git/gitweb.cgi?p=fuse/fuse%3Ba=commit%3Bh=cbd3a2a84068aae6e3fe32939d88470d712dbf47"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2011/02/02/2"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2011/02/03/5"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2011/02/08/4"
          }
        ],
        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-264"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T12:55:59+00:00",
      "cve": "CVE-2011-0543",
      "id": "CVE-2011-0543",
      "initial_release_date": "2011-01-01T00:00:00+00:00",
      "product_status:fixed": "23",
      "product_status:known_affected": "9",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "fuse: unprivileged user can unmount arbitrary locations via symlink attack",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2011/cve-2011-0543.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2025-04-25T13:56:01Z",
      "cve": "CVE-2011-0543",
      "id": "CVE-2011-0543",
      "initial_release_date": "2023-02-15T05:54:48Z",
      "product_status:recommended": "8",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2011-0543",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2011-0543.json",
      "version": "7"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.