GHSA-752F-2M5C-7473

Vulnerability from github – Published: 2022-05-14 01:13 – Updated: 2022-05-14 01:13
VLAI
Details

An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.

Severity
5.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2018-12896"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-07-02T17:29:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.",
  "id": "GHSA-752f-2m5c-7473",
  "modified": "2022-05-14T01:13:38Z",
  "published": "2022-05-14T01:13:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-12896"
    },
    {
      "type": "WEB",
      "url": "https://github.com/torvalds/linux/commit/78c9c4dfbf8c04883941445a195276bb4bb92c76"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.kernel.org/show_bug.cgi?id=200189"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lcytxw/bug_repro/tree/master/bug_200189"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3847-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3847-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3847-3"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3848-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3848-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3849-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3849-2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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