fkie_cve-2024-46690
Vulnerability from fkie_nvd
Published
2024-09-13 06:15
Modified
2024-09-20 15:55
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: nfsd: fix nfsd4_deleg_getattr_conflict in presence of third party lease It is not safe to dereference fl->c.flc_owner without first confirming fl->fl_lmops is the expected manager. nfsd4_deleg_getattr_conflict() tests fl_lmops but largely ignores the result and assumes that flc_owner is an nfs4_delegation anyway. This is wrong. With this patch we restore the "!= &nfsd_lease_mng_ops" case to behave as it did before the change mentioned below. This is the same as the current code, but without any reference to a possible delegation.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b46a871e980e3daa16fd5e77539966492e8910aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/40927f3d0972bf86357a32a5749be71a551241b6Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11


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{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0BCC4AEF-4876-4CFA-B9D6-F98855E75E74",
              "versionEndExcluding": "6.10.8",
              "versionStartIncluding": "6.9",
              "vulnerable": true
            },
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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\nnfsd: fix nfsd4_deleg_getattr_conflict in presence of third party lease\n\nIt is not safe to dereference fl-\u003ec.flc_owner without first confirming\nfl-\u003efl_lmops is the expected manager.  nfsd4_deleg_getattr_conflict()\ntests fl_lmops but largely ignores the result and assumes that flc_owner\nis an nfs4_delegation anyway.  This is wrong.\n\nWith this patch we restore the \"!= \u0026nfsd_lease_mng_ops\" case to behave\nas it did before the change mentioned below.  This is the same as the\ncurrent code, but without any reference to a possible delegation."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfsd: corregir nfsd4_deleg_getattr_conflict en presencia de una concesi\u00f3n de terceros No es seguro desreferenciar fl-\u0026gt;c.flc_owner sin confirmar primero que fl-\u0026gt;fl_lmops es el administrador esperado. nfsd4_deleg_getattr_conflict() prueba fl_lmops pero ignora en gran medida el resultado y asume que flc_owner es una nfs4_delegation de todos modos. Esto es incorrecto. Con este parche restauramos el caso \"!= \u0026amp;nfsd_lease_mng_ops\" para que se comporte como lo hac\u00eda antes del cambio mencionado a continuaci\u00f3n. Esto es lo mismo que el c\u00f3digo actual, pero sin ninguna referencia a una posible delegaci\u00f3n."
    }
  ],
  "id": "CVE-2024-46690",
  "lastModified": "2024-09-20T15:55:24.430",
  "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": "2024-09-13T06:15:13.753",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1b46a871e980e3daa16fd5e77539966492e8910a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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