fkie_cve-2024-50142
Vulnerability from fkie_nvd
Published
2024-11-07 10:15
Modified
2024-11-22 16:47
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: xfrm: validate new SA's prefixlen using SA family when sel.family is unset This expands the validation introduced in commit 07bf7908950a ("xfrm: Validate address prefix lengths in the xfrm selector.") syzbot created an SA with usersa.sel.family = AF_UNSPEC usersa.sel.prefixlen_s = 128 usersa.family = AF_INET Because of the AF_UNSPEC selector, verify_newsa_info doesn't put limits on prefixlen_{s,d}. But then copy_from_user_state sets x->sel.family to usersa.family (AF_INET). Do the same conversion in verify_newsa_info before validating prefixlen_{s,d}, since that's how prefixlen is going to be used later on.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/401ad99a5ae7180dd9449eac104cb755f442e7f3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d9868180bd1e4cf37e7c5067362658971162366Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8df5cd51fd70c33aa1776e5cbcd82b0a86649d73Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bce1afaa212ec380bf971614f70909a27882b862Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e68dd80ba498265d2266b12dc3459164f4ff0c4aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f31398570acf0f0804c644006f7bfa9067106b0aPatch
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 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: validate new SA\u0027s prefixlen using SA family when sel.family is unset\n\nThis expands the validation introduced in commit 07bf7908950a (\"xfrm:\nValidate address prefix lengths in the xfrm selector.\")\n\nsyzbot created an SA with\n    usersa.sel.family = AF_UNSPEC\n    usersa.sel.prefixlen_s = 128\n    usersa.family = AF_INET\n\nBecause of the AF_UNSPEC selector, verify_newsa_info doesn\u0027t put\nlimits on prefixlen_{s,d}. But then copy_from_user_state sets\nx-\u003esel.family to usersa.family (AF_INET). Do the same conversion in\nverify_newsa_info before validating prefixlen_{s,d}, since that\u0027s how\nprefixlen is going to be used later on."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: xfrm: validar el prefijo de la nueva SA usando la familia de SA cuando sel.family no est\u00e1 configurado Esto expande la validaci\u00f3n introducida en el commit 07bf7908950a (\"xfrm: validar las longitudes de prefijo de direcci\u00f3n en el selector xfrm\"). syzbot cre\u00f3 una SA con usersa.sel.family = AF_UNSPEC usersa.sel.prefixlen_s = 128 usersa.family = AF_INET Debido al selector AF_UNSPEC, verificar_newsa_info no pone l\u00edmites en prefixlen_{s,d}. Pero luego copy_from_user_state establece x-\u0026gt;sel.family en usersa.family (AF_INET). Realice la misma conversi\u00f3n en verificar_newsa_info antes de validar prefixlen_{s,d}, ya que as\u00ed es como se usar\u00e1 prefixlen m\u00e1s adelante."
    }
  ],
  "id": "CVE-2024-50142",
  "lastModified": "2024-11-22T16:47:08.477",
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          "attackVector": "LOCAL",
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          "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-11-07T10:15:06.170",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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}


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