github - ghsa-5583-qmch-62x6

ghsa-5583-qmch-62x6

Vulnerability from github

Published

2024-06-19 15:30

Modified

2024-08-27 18:31

Severity ?

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Details

In the Linux kernel, the following vulnerability has been resolved:

vduse: check that offset is within bounds in get_config()

This condition checks "len" but it does not check "offset" and that could result in an out of bounds read if "offset > dev->config_size". The problem is that since both variables are unsigned the "dev->config_size - offset" subtraction would result in a very high unsigned value.

I think these checks might not be necessary because "len" and "offset" are supposed to already have been validated using the vhost_vdpa_config_validate() function. But I do not know the code perfectly, and I like to be safe.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47604"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-19T15:15:54Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvduse: check that offset is within bounds in get_config()\n\nThis condition checks \"len\" but it does not check \"offset\" and that\ncould result in an out of bounds read if \"offset \u003e dev-\u003econfig_size\".\nThe problem is that since both variables are unsigned the\n\"dev-\u003econfig_size - offset\" subtraction would result in a very high\nunsigned value.\n\nI think these checks might not be necessary because \"len\" and \"offset\"\nare supposed to already have been validated using the\nvhost_vdpa_config_validate() function.  But I do not know the code\nperfectly, and I like to be safe.",
  "id": "GHSA-5583-qmch-62x6",
  "modified": "2024-08-27T18:31:35Z",
  "published": "2024-06-19T15:30:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47604"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2021-47604

Vulnerability from cvelistv5

Published

2024-06-19 14:54

Modified

2024-11-04 12:08

Severity ?

Summary

vduse: check that offset is within bounds in get_config()

References

▼	URL	Tags
	https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a
	https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

To clipboard

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