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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