fkie_cve-2021-47055
Vulnerability from fkie_nvd
Published
2024-02-29 23:15
Modified
2025-01-09 15:34
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: mtd: require write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require write permission. Depending on the hardware MEMLOCK might even be write-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK is always write-once. MEMSETBADBLOCK modifies the bad block table.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcafPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424beePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/077259f5e777c3c8821f6b41dee709fcda27306bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1e97743fd180981bef5f01402342bb54bf1c6366Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a08799d3e8c8088640956237c183f83463c39668Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcafPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424beePatch
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 *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "vulnerable": true
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: require write permissions for locking and badblock ioctls\n\nMEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require\nwrite permission. Depending on the hardware MEMLOCK might even be\nwrite-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK\nis always write-once.\n\nMEMSETBADBLOCK modifies the bad block table."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux se ha solucionado la siguiente vulnerabilidad: mtd: requiere permisos de escritura para bloqueo y badblock ioctls MEMLOCK, MEMUNLOCK y OTPLOCK modifican los bits de protecci\u00f3n. Por lo tanto, requiere permiso de escritura. Dependiendo del hardware, MEMLOCK podr\u00eda incluso ser de escritura \u00fanica, por ejemplo, para flashes SPI-NOR con su WP# vinculado a GND. OTPLOCK siempre se escribe una vez. MEMSETBADBLOCK modifica la tabla de bloques defectuosos."
    }
  ],
  "id": "CVE-2021-47055",
  "lastModified": "2025-01-09T15:34:43.780",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-02-29T23:15:07.473",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}


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