FKIE_CVE-2014-7975

Vulnerability from fkie_nvd - Published: 2014-10-13 10:55 - Updated: 2026-06-17 00:16
Summary
The do_umount function in fs/namespace.c in the Linux kernel through 3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb calls that change the root filesystem to read-only, which allows local users to cause a denial of service (loss of writability) by making certain unshare system calls, clearing the / MNT_LOCKED flag, and making an MNT_FORCE umount system call.
References
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5Mailing List, Patch, Vendor Advisory
cve@mitre.orghttp://secunia.com/advisories/60174Broken Link
cve@mitre.orghttp://secunia.com/advisories/61145Broken Link
cve@mitre.orghttp://secunia.com/advisories/62633Broken Link
cve@mitre.orghttp://secunia.com/advisories/62634Broken Link
cve@mitre.orghttp://thread.gmane.org/gmane.linux.kernel.stable/109312Broken Link
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2014/10/08/22Mailing List, Third Party Advisory
cve@mitre.orghttp://www.securityfocus.com/bid/70314Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1031180Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2415-1Third Party Advisory
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2416-1Third Party Advisory
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2417-1Third Party Advisory
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2418-1Third Party Advisory
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2419-1Third Party Advisory
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2420-1Third Party Advisory
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2421-1Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1151108Issue Tracking, Patch, Third Party Advisory
cve@mitre.orghttps://exchange.xforce.ibmcloud.com/vulnerabilities/96994Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/60174Broken Link
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/61145Broken Link
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/62633Broken Link
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/62634Broken Link
af854a3a-2127-422b-91ae-364da2661108http://thread.gmane.org/gmane.linux.kernel.stable/109312Broken Link
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2014/10/08/22Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/70314Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1031180Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2415-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2416-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2417-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2418-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2419-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2420-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2421-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1151108Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/96994Third Party Advisory, VDB Entry
Impacted products

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
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              "matchCriteriaId": "2EDC011A-F5BE-496E-857F-8586DD6E33E4",
              "versionEndIncluding": "3.17",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*",
              "matchCriteriaId": "01EDA41C-6B2E-49AF-B503-EB3882265C11",
              "vulnerable": true
            },
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              "vulnerable": true
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              "vulnerable": true
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          "negate": false,
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The do_umount function in fs/namespace.c in the Linux kernel through 3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb calls that change the root filesystem to read-only, which allows local users to cause a denial of service (loss of writability) by making certain unshare system calls, clearing the / MNT_LOCKED flag, and making an MNT_FORCE umount system call."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n do_umount en fs/namespace.c en el kernel de Linux hasta 3.17 no requiere la capacidad CAP_SYS_ADMIN para llamadas do_remount_sb que cambian el sistema de ficheros root a s\u00f3lo lectura, lo que permite a usuarios locales causar una denegaci\u00f3n de servicio (p\u00e9rdida de la habilidad de escritura) mediante la realizaci\u00f3n de ciertas llamadas a la liberaci\u00f3n de sistemas, la limpieza del indicador / MNT_LOCKED, y la realizaci\u00f3n de una llamada al sistema umount MNT_FORCE."
    }
  ],
  "id": "CVE-2014-7975",
  "lastModified": "2026-06-17T00:16:02.230",
  "metrics": {
    "cvssMetricV2": [
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        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 4.9,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2014-10-13T10:55:09.263",
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    },
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  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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