ghsa-4f87-mww8-gm8x
Vulnerability from github
Published
2022-03-24 00:00
Modified
2022-03-30 00:01
Severity ?
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Details

A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-3748"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-03-23T20:15:00Z",
    "severity": "HIGH"
  },
  "details": "A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor\u0027s address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.",
  "id": "GHSA-4f87-mww8-gm8x",
  "modified": "2022-03-30T00:01:01Z",
  "published": "2022-03-24T00:00:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3748"
    },
    {
      "type": "WEB",
      "url": "https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1998514"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202208-27"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20220425-0004"
    },
    {
      "type": "WEB",
      "url": "https://ubuntu.com/security/CVE-2021-3748"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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