gsd-2018-20482
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).
Aliases
Aliases
CVE-2018-20482


To clipboard 

{
   GSD: {
      alias: "CVE-2018-20482",
      description: "GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).",
      id: "GSD-2018-20482",
      references: [
         "https://www.suse.com/security/cve/CVE-2018-20482.html",
         "https://ubuntu.com/security/CVE-2018-20482",
         "https://advisories.mageia.org/CVE-2018-20482.html",
         "https://security.archlinux.org/CVE-2018-20482",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2018-20482",
         ],
         details: "GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).",
         id: "GSD-2018-20482",
         modified: "2023-12-13T01:22:29.534685Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "cve@mitre.org",
            ID: "CVE-2018-20482",
            STATE: "PUBLIC",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "n/a",
                              version: {
                                 version_data: [
                                    {
                                       version_value: "n/a",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "n/a",
                  },
               ],
            },
         },
         data_format: "MITRE",
         data_type: "CVE",
         data_version: "4.0",
         description: {
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               {
                  lang: "eng",
                  value: "GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).",
               },
            ],
         },
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "n/a",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug",
                  refsource: "MISC",
                  url: "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug",
               },
               {
                  name: "http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454",
                  refsource: "MISC",
                  url: "http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454",
               },
               {
                  name: "[debian-lts-announce] 20181231 [SECURITY] [DLA 1623-1] tar security update",
                  refsource: "MLIST",
                  url: "https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html",
               },
               {
                  name: "https://news.ycombinator.com/item?id=18745431",
                  refsource: "MISC",
                  url: "https://news.ycombinator.com/item?id=18745431",
               },
               {
                  name: "106354",
                  refsource: "BID",
                  url: "http://www.securityfocus.com/bid/106354",
               },
               {
                  name: "GLSA-201903-05",
                  refsource: "GENTOO",
                  url: "https://security.gentoo.org/glsa/201903-05",
               },
               {
                  name: "http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html",
                  refsource: "MISC",
                  url: "http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html",
               },
               {
                  name: "https://twitter.com/thatcks/status/1076166645708668928",
                  refsource: "MISC",
                  url: "https://twitter.com/thatcks/status/1076166645708668928",
               },
               {
                  name: "openSUSE-SU-2019:1237",
                  refsource: "SUSE",
                  url: "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html",
               },
               {
                  name: "[debian-lts-announce] 20211128 [SECURITY] [DLA 2830-1] tar security update",
                  refsource: "MLIST",
                  url: "https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html",
               },
            ],
         },
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:gnu:tar:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndIncluding: "1.30",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "cve@mitre.org",
               ID: "CVE-2018-20482",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "en",
                     value: "GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "CWE-835",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug",
                     refsource: "MISC",
                     tags: [
                        "Patch",
                        "Third Party Advisory",
                     ],
                     url: "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug",
                  },
                  {
                     name: "https://twitter.com/thatcks/status/1076166645708668928",
                     refsource: "MISC",
                     tags: [
                        "Patch",
                        "Third Party Advisory",
                     ],
                     url: "https://twitter.com/thatcks/status/1076166645708668928",
                  },
                  {
                     name: "https://news.ycombinator.com/item?id=18745431",
                     refsource: "MISC",
                     tags: [
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                     ],
                     url: "https://news.ycombinator.com/item?id=18745431",
                  },
                  {
                     name: "http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html",
                     refsource: "MISC",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html",
                  },
                  {
                     name: "[debian-lts-announce] 20181231 [SECURITY] [DLA 1623-1] tar security update",
                     refsource: "MLIST",
                     tags: [
                        "Mailing List",
                        "Third Party Advisory",
                     ],
                     url: "https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html",
                  },
                  {
                     name: "106354",
                     refsource: "BID",
                     tags: [
                        "Third Party Advisory",
                        "VDB Entry",
                     ],
                     url: "http://www.securityfocus.com/bid/106354",
                  },
                  {
                     name: "http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454",
                     refsource: "MISC",
                     tags: [
                        "Patch",
                        "Third Party Advisory",
                     ],
                     url: "http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454",
                  },
                  {
                     name: "GLSA-201903-05",
                     refsource: "GENTOO",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://security.gentoo.org/glsa/201903-05",
                  },
                  {
                     name: "openSUSE-SU-2019:1237",
                     refsource: "SUSE",
                     tags: [
                        "Mailing List",
                        "Third Party Advisory",
                     ],
                     url: "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html",
                  },
                  {
                     name: "[debian-lts-announce] 20211128 [SECURITY] [DLA 2830-1] tar security update",
                     refsource: "MLIST",
                     tags: [
                        "Mailing List",
                        "Third Party Advisory",
                     ],
                     url: "https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html",
                  },
               ],
            },
         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "MEDIUM",
                  accessVector: "LOCAL",
                  authentication: "NONE",
                  availabilityImpact: "PARTIAL",
                  baseScore: 1.9,
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  vectorString: "AV:L/AC:M/Au:N/C:N/I:N/A:P",
                  version: "2.0",
               },
               exploitabilityScore: 3.4,
               impactScore: 2.9,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "LOW",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  attackComplexity: "HIGH",
                  attackVector: "LOCAL",
                  availabilityImpact: "HIGH",
                  baseScore: 4.7,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.1",
               },
               exploitabilityScore: 1,
               impactScore: 3.6,
            },
         },
         lastModifiedDate: "2021-11-30T19:52Z",
         publishedDate: "2018-12-26T18:29Z",
      },
   },
}


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