ubuntu-cve-2017-18018
Vulnerability from osv_ubuntu
Published
2018-01-04 04:29
Modified
2025-10-24 04:46
Summary
Details

In GNU Coreutils through 8.29, chown-core.c in chown and chgrp does not prevent replacement of a plain file with a symlink during use of the POSIX "-R -L" options, which allows local users to modify the ownership of arbitrary files by leveraging a race condition.

Severity
4.7 (Medium)
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "coreutils",
            "binary_version": "8.21-1ubuntu5.4"
          },
          {
            "binary_name": "mktemp",
            "binary_version": "8.21-1ubuntu5.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "coreutils",
        "purl": "pkg:deb/ubuntu/coreutils@8.21-1ubuntu5.4?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.20-3ubuntu5",
        "8.21-1ubuntu3",
        "8.21-1ubuntu4",
        "8.21-1ubuntu5",
        "8.21-1ubuntu5.1",
        "8.21-1ubuntu5.3",
        "8.21-1ubuntu5.4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "coreutils",
            "binary_version": "8.25-2ubuntu3~16.04"
          },
          {
            "binary_name": "mktemp",
            "binary_version": "8.25-2ubuntu3~16.04"
          },
          {
            "binary_name": "realpath",
            "binary_version": "8.25-2ubuntu3~16.04"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "coreutils",
        "purl": "pkg:deb/ubuntu/coreutils@8.25-2ubuntu3~16.04?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.23-4ubuntu2",
        "8.25-2ubuntu2",
        "8.25-2ubuntu3~16.04"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "coreutils",
            "binary_version": "8.28-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "coreutils",
        "purl": "pkg:deb/ubuntu/coreutils@8.28-1ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.26-3ubuntu4",
        "8.28-1ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "In GNU Coreutils through 8.29, chown-core.c in chown and chgrp does not prevent replacement of a plain file with a symlink during use of the POSIX \"-R -L\" options, which allows local users to modify the ownership of arbitrary files by leveraging a race condition.",
  "id": "UBUNTU-CVE-2017-18018",
  "modified": "2025-10-24T04:46:38Z",
  "published": "2018-01-04T04:29:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2017-18018"
    },
    {
      "type": "REPORT",
      "url": "http://lists.gnu.org/archive/html/coreutils/2017-12/msg00045.html"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2018/01/04/3"
    },
    {
      "type": "REPORT",
      "url": "https://lists.gnu.org/archive/html/coreutils/2017-12/msg00072.html"
    },
    {
      "type": "REPORT",
      "url": "https://lists.gnu.org/archive/html/coreutils/2017-12/msg00073.html"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2017-18018"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2017-18018"
  ]
}



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