GHSA-5P56-PCGW-42MF

Vulnerability from github – Published: 2022-05-13 01:02 – Updated: 2022-05-13 01:02
VLAI
Details

The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2018-13405"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-07-06T14:29:00Z",
    "severity": "HIGH"
  },
  "details": "The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID.",
  "id": "GHSA-5p56-pcgw-42mf",
  "modified": "2022-05-13T01:02:48Z",
  "published": "2022-05-13T01:02:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-13405"
    },
    {
      "type": "WEB",
      "url": "https://github.com/torvalds/linux/commit/0fa3ecd87848c9c93c2c828ef4c3a8ca36ce46c7"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/45033"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2018/dsa-4266"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3754-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3753-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3753-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3752-3"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3752-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3752-1"
    },
    {
      "type": "WEB",
      "url": "https://twitter.com/grsecurity/status/1015082951204327425"
    },
    {
      "type": "WEB",
      "url": "https://support.f5.com/csp/article/K00854051"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MTKKIAUMR5FAYLZ7HLEPOXMKAAE3BYBQ"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HRBNBX73SAFKQWBOX76SLMWPTKJPVGEJ"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2018/08/msg00014.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=0b3369840cd61c23e2b9241093737b4c395cb406"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:4164"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:4159"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:2730"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:2696"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:2566"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:2476"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:0717"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3096"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3083"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2948"
    },
    {
      "type": "WEB",
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848c9c93c2c828ef4c3a8ca36ce46c7"
    },
    {
      "type": "WEB",
      "url": "http://openwall.com/lists/oss-security/2018/07/13/2"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/106503"
    }
  ],
  "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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