fkie_cve-2021-47401
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2025-09-26 19:03
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: ipack: ipoctal: fix stack information leak The tty driver name is used also after registering the driver and must specifically not be allocated on the stack to avoid leaking information to user space (or triggering an oops). Drivers should not try to encode topology information in the tty device name but this one snuck in through staging without anyone noticing and another driver has since copied this malpractice. Fixing the ABI is a separate issue, but this at least plugs the security hole.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380Patch
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 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15


To clipboard 

{
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipack: ipoctal: fix stack information leak\n\nThe tty driver name is used also after registering the driver and must\nspecifically not be allocated on the stack to avoid leaking information\nto user space (or triggering an oops).\n\nDrivers should not try to encode topology information in the tty device\nname but this one snuck in through staging without anyone noticing and\nanother driver has since copied this malpractice.\n\nFixing the ABI is a separate issue, but this at least plugs the security\nhole."
    },
    {
      "lang": "es",
      "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipack: ipoctal: corrige la fuga de informaci\u00f3n de la pila. El nombre del controlador tty tambi\u00e9n se usa despu\u00e9s de registrar el controlador y espec\u00edficamente no debe asignarse en la pila para evitar filtrar informaci\u00f3n al espacio del usuario (o activar un ups). Los controladores no deber\u00edan intentar codificar informaci\u00f3n de topolog\u00eda en el nombre del dispositivo tty, pero este se col\u00f3 durante la preparaci\u00f3n sin que nadie se diera cuenta y desde entonces otro controlador copi\u00f3 esta mala pr\u00e1ctica. Arreglar la ABI es un tema aparte, pero esto al menos tapa el agujero de seguridad."
    }
  ],
  "id": "CVE-2021-47401",
  "lastModified": "2025-09-26T19:03:45.330",
  "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"
      }
    ]
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  "published": "2024-05-21T15:15:25.563",
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  "vulnStatus": "Analyzed",
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          "value": "CWE-668"
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      "source": "nvd@nist.gov",
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}


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