CVE-2018-20482
Vulnerability from cvelistv5
Published
2018-12-26 18:00
Modified
2024-08-05 12:05
Severity ?
Summary
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).
References
cve@mitre.orghttp://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454Patch, Third Party Advisory
cve@mitre.orghttp://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.htmlThird Party Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://www.securityfocus.com/bid/106354Third Party Advisory, VDB Entry
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2018/12/msg00023.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2021/11/msg00025.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://news.ycombinator.com/item?id=18745431Exploit, Third Party Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/201903-05Third Party Advisory
cve@mitre.orghttps://twitter.com/thatcks/status/1076166645708668928Patch, Third Party Advisory
cve@mitre.orghttps://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBugPatch, Third Party Advisory
Impacted products
n/an/a
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T12:05:16.165Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454"
          },
          {
            "name": "[debian-lts-announce] 20181231 [SECURITY] [DLA 1623-1] tar security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://news.ycombinator.com/item?id=18745431"
          },
          {
            "name": "106354",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/106354"
          },
          {
            "name": "GLSA-201903-05",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/201903-05"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://twitter.com/thatcks/status/1076166645708668928"
          },
          {
            "name": "openSUSE-SU-2019:1237",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html"
          },
          {
            "name": "[debian-lts-announce] 20211128 [SECURITY] [DLA 2830-1] tar security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2018-12-26T00:00:00",
      "descriptions": [
        {
          "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)."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-11-28T14:06:09",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug"
        },
        {
          "tags": [
            "x_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",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://news.ycombinator.com/item?id=18745431"
        },
        {
          "name": "106354",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/106354"
        },
        {
          "name": "GLSA-201903-05",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/201903-05"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://twitter.com/thatcks/status/1076166645708668928"
        },
        {
          "name": "openSUSE-SU-2019:1237",
          "tags": [
            "vendor-advisory",
            "x_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",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html"
        }
      ],
      "x_legacyV4Record": {
        "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": {
          "description_data": [
            {
              "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\u0027s 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"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2018-20482",
    "datePublished": "2018-12-26T18:00:00",
    "dateReserved": "2018-12-26T00:00:00",
    "dateUpdated": "2024-08-05T12:05:16.165Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2018-20482\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2018-12-26T18:29:00.373\",\"lastModified\":\"2021-11-30T19:52:03.843\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"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).\"},{\"lang\":\"es\",\"value\":\"GNU Tar, hasta la versi\u00f3n 1.30, cuando se emplea --sparse, gestiona de manera incorrecta el encogimiento de archivos durante el acceso de lectura, lo que permite que usuarios locales provoquen una denegaci\u00f3n de servicio (bucle infinito de lectura en sparse_dump_region en sparse.c) modificando un archivo que deber\u00eda ser archivado por el proceso de un usuario diferente (por ejemplo, un backup del sistema que se ejecuta como root).\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.0,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:M/Au:N/C:N/I:N/A:P\",\"accessVector\":\"LOCAL\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\",\"baseScore\":1.9},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":3.4,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-835\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gnu:tar:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"1.30\",\"matchCriteriaId\":\"568B865E-7BA0-45A1-A944-575D49BC289E\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DEECE5FC-CACF-4496-A3E7-164736409252\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F1E78106-58E6-4D59-990F-75DA575BFAD9\"}]}]}],\"references\":[{\"url\":\"http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.securityfocus.com/bid/106354\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2021/11/msg00025.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://news.ycombinator.com/item?id=18745431\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/201903-05\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://twitter.com/thatcks/status/1076166645708668928\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Third Party Advisory\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.