gsd-2018-7738
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.
Aliases
Aliases
CVE-2018-7738


To clipboard 

{
   GSD: {
      alias: "CVE-2018-7738",
      description: "In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.",
      id: "GSD-2018-7738",
      references: [
         "https://www.suse.com/security/cve/CVE-2018-7738.html",
         "https://www.debian.org/security/2018/dsa-4134",
         "https://ubuntu.com/security/CVE-2018-7738",
         "https://advisories.mageia.org/CVE-2018-7738.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2018-7738",
         ],
         details: "In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.",
         id: "GSD-2018-7738",
         modified: "2023-12-13T01:22:32.462211Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "cve@mitre.org",
            ID: "CVE-2018-7738",
            STATE: "PUBLIC",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "n/a",
                              version: {
                                 version_data: [
                                    {
                                       version_value: "n/a",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "n/a",
                  },
               ],
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         },
         data_format: "MITRE",
         data_type: "CVE",
         data_version: "4.0",
         description: {
            description_data: [
               {
                  lang: "eng",
                  value: "In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.",
               },
            ],
         },
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "n/a",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "https://github.com/karelzak/util-linux/issues/539",
                  refsource: "MISC",
                  url: "https://github.com/karelzak/util-linux/issues/539",
               },
               {
                  name: "DSA-4134",
                  refsource: "DEBIAN",
                  url: "https://www.debian.org/security/2018/dsa-4134",
               },
               {
                  name: "103367",
                  refsource: "BID",
                  url: "http://www.securityfocus.com/bid/103367",
               },
               {
                  name: "https://bugs.debian.org/892179",
                  refsource: "MISC",
                  url: "https://bugs.debian.org/892179",
               },
               {
                  name: "https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55",
                  refsource: "MISC",
                  url: "https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55",
               },
               {
                  name: "USN-4512-1",
                  refsource: "UBUNTU",
                  url: "https://usn.ubuntu.com/4512-1/",
               },
            ],
         },
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndIncluding: "2.31",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "cve@mitre.org",
               ID: "CVE-2018-7738",
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            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "en",
                     value: "In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
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                           lang: "en",
                           value: "NVD-CWE-noinfo",
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            },
            references: {
               reference_data: [
                  {
                     name: "https://github.com/karelzak/util-linux/issues/539",
                     refsource: "MISC",
                     tags: [
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                     url: "https://github.com/karelzak/util-linux/issues/539",
                  },
                  {
                     name: "https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55",
                     refsource: "MISC",
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                     url: "https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55",
                  },
                  {
                     name: "https://bugs.debian.org/892179",
                     refsource: "MISC",
                     tags: [
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                        "Third Party Advisory",
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                     url: "https://bugs.debian.org/892179",
                  },
                  {
                     name: "DSA-4134",
                     refsource: "DEBIAN",
                     tags: [
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                     refsource: "UBUNTU",
                     tags: [],
                     url: "https://usn.ubuntu.com/4512-1/",
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         },
         impact: {
            baseMetricV2: {
               cvssV2: {
                  accessComplexity: "LOW",
                  accessVector: "LOCAL",
                  authentication: "NONE",
                  availabilityImpact: "COMPLETE",
                  baseScore: 7.2,
                  confidentialityImpact: "COMPLETE",
                  integrityImpact: "COMPLETE",
                  vectorString: "AV:L/AC:L/Au:N/C:C/I:C/A:C",
                  version: "2.0",
               },
               exploitabilityScore: 3.9,
               impactScore: 10,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "HIGH",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  attackComplexity: "LOW",
                  attackVector: "LOCAL",
                  availabilityImpact: "HIGH",
                  baseScore: 7.8,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "HIGH",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  version: "3.0",
               },
               exploitabilityScore: 1.8,
               impactScore: 5.9,
            },
         },
         lastModifiedDate: "2020-09-25T18:15Z",
         publishedDate: "2018-03-07T02:29Z",
      },
   },
}


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