GHSA-8H84-VMJF-PCMJ

Vulnerability from github – Published: 2022-12-19 21:30 – Updated: 2022-12-28 21:30
VLAI?
Details

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.

Severity ?
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2022-3775"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-12-19T20:15:00Z",
    "severity": "HIGH"
  },
  "details": "When rendering certain unicode sequences, grub2\u0027s font code doesn\u0027t proper validate if the informed glyph\u0027s width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2\u0027s heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.",
  "id": "GHSA-8h84-vmjf-pcmj",
  "modified": "2022-12-28T21:30:21Z",
  "published": "2022-12-19T21:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-3775"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/cve-2022-3775"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202311-14"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.