fkie_cve-2023-52439
Vulnerability from fkie_nvd
Published
2024-02-20 21:15
Modified
2024-12-27 16:15
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(&idev->dev) put_device(&idev->dev) uio_device_release get_device(&idev->dev) kfree(idev) uio_free_minor(minor) uio_release put_device(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, the idev will be double freed. To address this issue, we can get idev atomic & inc idev reference with minor_lock.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdeaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92adPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdeaPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92adPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20241227-0006/
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 *
linux linux_kernel 4.18
linux linux_kernel 4.18
linux linux_kernel 4.18
linux linux_kernel 4.18
linux linux_kernel 4.18


To clipboard 

{
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: Fix use-after-free in uio_open\n\ncore-1\t\t\t\tcore-2\n-------------------------------------------------------\nuio_unregister_device\t\tuio_open\n\t\t\t\tidev = idr_find()\ndevice_unregister(\u0026idev-\u003edev)\nput_device(\u0026idev-\u003edev)\nuio_device_release\n\t\t\t\tget_device(\u0026idev-\u003edev)\nkfree(idev)\nuio_free_minor(minor)\n\t\t\t\tuio_release\n\t\t\t\tput_device(\u0026idev-\u003edev)\n\t\t\t\tkfree(idev)\n-------------------------------------------------------\n\nIn the core-1 uio_unregister_device(), the device_unregister will kfree\nidev when the idev-\u003edev kobject ref is 1. But after core-1\ndevice_unregister, put_device and before doing kfree, the core-2 may\nget_device. Then:\n1. After core-1 kfree idev, the core-2 will do use-after-free for idev.\n2. When core-2 do uio_release and put_device, the idev will be double\n   freed.\n\nTo address this issue, we can get idev atomic \u0026 inc idev reference with\nminor_lock."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: uio: corrige use-after-free en uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(\u0026amp;idev-\u0026gt;dev) put_device(\u0026amp;idev-\u0026gt;dev) uio_device_release get_device(\u0026amp;idev-\u0026gt;dev) kfree(idev) uio_free_minor(minor) uio_release put_device(\u0026amp;idev-\u0026gt;dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister se liberar\u00e1 idev cuando la referencia del objeto idev-\u0026gt;dev kobject es 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, el idev se liberar\u00e1 dos veces. Para solucionar este problema, podemos obtener la referencia de idev atomic \u0026amp; inc idev con minor_lock."
    }
  ],
  "id": "CVE-2023-52439",
  "lastModified": "2024-12-27T16:15:23.080",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-02-20T21:15:08.213",
  "references": [
    {
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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