ghsa-g2wx-phqf-j84q
Vulnerability from github
Published
2022-05-13 01:04
Modified
2022-05-13 01:04
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.

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{
  "affected": [],
  "aliases": [
    "CVE-2017-18078"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-01-29T05:29:00Z",
    "severity": "HIGH"
  },
  "details": "systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.",
  "id": "GHSA-g2wx-phqf-j84q",
  "modified": "2022-05-13T01:04:10Z",
  "published": "2022-05-13T01:04:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18078"
    },
    {
      "type": "WEB",
      "url": "https://github.com/systemd/systemd/issues/7736"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/43935"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2018/01/29/4"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2018/01/29/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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