fkie_cve-2021-46906
Vulnerability from fkie_nvd
Published
2024-02-26 18:15
Modified
2024-11-21 06:34
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: fix info leak in hid_submit_ctrl In hid_submit_ctrl(), the way of calculating the report length doesn't take into account that report->size can be zero. When running the syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to calculate transfer_buffer_length as 16384. When this urb is passed to the usb core layer, KMSAN reports an info leak of 16384 bytes. To fix this, first modify hid_report_len() to account for the zero report size case by using DIV_ROUND_UP for the division. Then, call it from hid_submit_ctrl().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e280502be1b003c3483ae03fc60dea554fcfa82Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21883bff0fd854e07429a773ff18f1e9658f50e8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/41b1e71a2c57366b08dcca1a28b0d45ca69429cePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6be388f4a35d2ce5ef7dbf635a8964a5da7f799fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c064eece9a51856f3f275104520c7e3017fc5c0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1e3596416d74ce95cc0b7b38472329a3818f8a9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c5d3c142f2d57d40c55e65d5622d319125a45366Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0e280502be1b003c3483ae03fc60dea554fcfa82Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/21883bff0fd854e07429a773ff18f1e9658f50e8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/41b1e71a2c57366b08dcca1a28b0d45ca69429cePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6be388f4a35d2ce5ef7dbf635a8964a5da7f799fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8c064eece9a51856f3f275104520c7e3017fc5c0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b1e3596416d74ce95cc0b7b38472329a3818f8a9Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c5d3c142f2d57d40c55e65d5622d319125a45366Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: usbhid: fix info leak in hid_submit_ctrl\n\nIn hid_submit_ctrl(), the way of calculating the report length doesn\u0027t\ntake into account that report-\u003esize can be zero. When running the\nsyzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to\ncalculate transfer_buffer_length as 16384. When this urb is passed to\nthe usb core layer, KMSAN reports an info leak of 16384 bytes.\n\nTo fix this, first modify hid_report_len() to account for the zero\nreport size case by using DIV_ROUND_UP for the division. Then, call it\nfrom hid_submit_ctrl()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: HID: usbhid: corrige fuga de informaci\u00f3n en hid_submit_ctrl En hid_submit_ctrl(), la forma de calcular la longitud del informe no tiene en cuenta que el tama\u00f1o del informe-\u0026gt;puede ser cero. Cuando se ejecuta el reproductor syzkaller, un informe de tama\u00f1o 0 hace que hid_submit_ctrl) calcule transfer_buffer_length como 16384. Cuando esta urb se pasa a la capa central USB, KMSAN informa una fuga de informaci\u00f3n de 16384 bytes. Para solucionar este problema, primero modifique hid_report_len() para tener en cuenta el caso de tama\u00f1o de informe cero utilizando DIV_ROUND_UP para la divisi\u00f3n. Luego, ll\u00e1malo desde hid_submit_ctrl()."
    }
  ],
  "id": "CVE-2021-46906",
  "lastModified": "2024-11-21T06:34:54.283",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-02-26T18:15:07.160",
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-668"
        }
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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