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\u0027s 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\u0027s 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": {
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        "ID": "CVE-2018-20482",
        "STATE": "PUBLIC"
      },
      "affects": {
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              "product": {
                "product_data": [
                  {
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                    "version": {
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                        {
                          "version_value": "n/a"
                        }
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                  }
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            "name": "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug",
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            "url": "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug"
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          },
          {
            "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"
          },
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          {
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          },
          {
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            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html"
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          {
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            "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html"
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      }
    },
    "nvd.nist.gov": {
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      },
      "cve": {
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        "description": {
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              "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\u0027s process (e.g., a system backup running as root)."
            }
          ]
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        "problemtype": {
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                  "value": "CWE-835"
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        },
        "references": {
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              "name": "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug",
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              "url": "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug"
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              "name": "https://twitter.com/thatcks/status/1076166645708668928",
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              "url": "https://twitter.com/thatcks/status/1076166645708668928"
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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": [
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              "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": [
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              "url": "https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html"
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            },
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              "refsource": "SUSE",
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              "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html"
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            {
              "name": "[debian-lts-announce] 20211128 [SECURITY] [DLA 2830-1] tar security update",
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              ],
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        }
      },
      "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": 1.0,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2021-11-30T19:52Z",
      "publishedDate": "2018-12-26T18:29Z"
    }
  }
}


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