ghsa-7cx6-7887-9rwv
Vulnerability from github
Published
2022-05-13 01:19
Modified
2022-05-13 01:19
Severity ?
5.5 (Medium) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Details

The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.

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{
  "affected": [],
  "aliases": [
    "CVE-2018-18397"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-12-12T10:29:00Z",
    "severity": "MODERATE"
  },
  "details": "The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.",
  "id": "GHSA-7cx6-7887-9rwv",
  "modified": "2022-05-13T01:19:36Z",
  "published": "2022-05-13T01:19:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-18397"
    },
    {
      "type": "WEB",
      "url": "https://github.com/torvalds/linux/commit/29ec90660d68bbdd69507c1c8b4e33aa299278b1"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHBA-2019:0327"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:0163"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:0202"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:0324"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:0831"
    },
    {
      "type": "WEB",
      "url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1700"
    },
    {
      "type": "WEB",
      "url": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.87"
    },
    {
      "type": "WEB",
      "url": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.7"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3901-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3901-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3903-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3903-2"
    },
    {
      "type": "WEB",
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=29ec90660d68bbdd69507c1c8b4e33aa299278b1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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