ghsa-j9fr-8f9m-c9qc
Vulnerability from github
Published
2022-05-13 01:14
Modified
2022-05-13 01:14
Severity ?
5.5 (Medium) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Details

The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).

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{
  "affected": [],
  "aliases": [
    "CVE-2017-18344"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-07-26T19:29:00Z",
    "severity": "MODERATE"
  },
  "details": "The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn\u0027t properly validate the sigevent-\u003esigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).",
  "id": "GHSA-j9fr-8f9m-c9qc",
  "modified": "2022-05-13T01:14:42Z",
  "published": "2022-05-13T01:14:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18344"
    },
    {
      "type": "WEB",
      "url": "https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2948"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3083"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3096"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3459"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3540"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3586"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3590"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3591"
    },
    {
      "type": "WEB",
      "url": "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3742-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3742-2"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/45175"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/104909"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1041414"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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