fkie_cve-2021-47240
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2024-12-30 19:04
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: fix OOB Read in qrtr_endpoint_post Syzbot reported slab-out-of-bounds Read in qrtr_endpoint_post. The problem was in wrong _size_ type: if (len != ALIGN(size, 4) + hdrlen) goto err; If size from qrtr_hdr is 4294967293 (0xfffffffd), the result of ALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293 in header this check won't fail and skb_put_data(skb, data + hdrlen, size); will read out of bound from data, which is hdrlen allocated block.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19892ab9c9d838e2e5a7744d36e4bb8b7c3292fePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26b8d10703a9be45d6097946b2b4011f7dd2c56fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/960b08dd36de1e341e3eb43d1c547513e338f4f8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad9d24c9429e2159d1e279dc3a83191ccb4daf1dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8111c0d7ed42ede41a3d0d393b104de0730a8a6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/19892ab9c9d838e2e5a7744d36e4bb8b7c3292fePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/26b8d10703a9be45d6097946b2b4011f7dd2c56fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/960b08dd36de1e341e3eb43d1c547513e338f4f8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ad9d24c9429e2159d1e279dc3a83191ccb4daf1dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f8111c0d7ed42ede41a3d0d393b104de0730a8a6Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13


To clipboard 

{
  "configurations": [
    {
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        {
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              "versionStartIncluding": "4.15",
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          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: fix OOB Read in qrtr_endpoint_post\n\nSyzbot reported slab-out-of-bounds Read in\nqrtr_endpoint_post. The problem was in wrong\n_size_ type:\n\n\tif (len != ALIGN(size, 4) + hdrlen)\n\t\tgoto err;\n\nIf size from qrtr_hdr is 4294967293 (0xfffffffd), the result of\nALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293\nin header this check won\u0027t fail and\n\n\tskb_put_data(skb, data + hdrlen, size);\n\nwill read out of bound from data, which is hdrlen allocated block."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: qrtr: arreglar OOB Lectura en qrtr_endpoint_post. Syzbot report\u00f3 slab-out-of-bounds Lectura en qrtr_endpoint_post. El problema estaba en el tipo de _tama\u00f1o_ incorrecto: if (len != ALIGN(size, 4) + hdrlen) goto err; Si el tama\u00f1o de qrtr_hdr es 4294967293 (0xfffffffd), el resultado de ALIGN(size, 4) ser\u00e1 0. En caso de len == hdrlen y size == 4294967293 en el encabezado, esta verificaci\u00f3n no fallar\u00e1 y skb_put_data(skb, data + hdrlen, tama\u00f1o); leer\u00e1 fuera de los l\u00edmites de los datos, que son bloques asignados hdrlen."
    }
  ],
  "id": "CVE-2021-47240",
  "lastModified": "2024-12-30T19:04:58.760",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "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:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-05-21T15:15:13.177",
  "references": [
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      "tags": [
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      "tags": [
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      "tags": [
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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