fkie_cve-2021-47549
Vulnerability from fkie_nvd
Published
2024-05-24 15:15
Modified
2025-01-07 17:04
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: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl When the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux, a bug is reported: ================================================================== BUG: Unable to handle kernel data access on read at 0x80000800805b502c Oops: Kernel access of bad area, sig: 11 [#1] NIP [c0000000000388a4] .ioread32+0x4/0x20 LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl] Call Trace: .free_irq+0x1c/0x4e0 (unreliable) .ata_host_stop+0x74/0xd0 [libata] .release_nodes+0x330/0x3f0 .device_release_driver_internal+0x178/0x2c0 .driver_detach+0x64/0xd0 .bus_remove_driver+0x70/0xf0 .driver_unregister+0x38/0x80 .platform_driver_unregister+0x14/0x30 .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl] .__se_sys_delete_module+0x1ec/0x2d0 .system_call_exception+0xfc/0x1f0 system_call_common+0xf8/0x200 ================================================================== The triggering of the BUG is shown in the following stack: driver_detach device_release_driver_internal __device_release_driver drv->remove(dev) --> platform_drv_remove/platform_remove drv->remove(dev) --> sata_fsl_remove iounmap(host_priv->hcr_base); <---- unmap kfree(host_priv); <---- free devres_release_all release_nodes dr->node.release(dev, dr->data) --> ata_host_stop ap->ops->port_stop(ap) --> sata_fsl_port_stop ioread32(hcr_base + HCONTROL) <---- UAF host->ops->host_stop(host) The iounmap(host_priv->hcr_base) and kfree(host_priv) functions should not be executed in drv->remove. These functions should be executed in host_stop after port_stop. Therefore, we move these functions to the new function sata_fsl_host_stop and bind the new function to host_stop.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389cePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389cePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947Patch
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 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl\n\nWhen the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux,\na bug is reported:\n ==================================================================\n BUG: Unable to handle kernel data access on read at 0x80000800805b502c\n Oops: Kernel access of bad area, sig: 11 [#1]\n NIP [c0000000000388a4] .ioread32+0x4/0x20\n LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl]\n Call Trace:\n  .free_irq+0x1c/0x4e0 (unreliable)\n  .ata_host_stop+0x74/0xd0 [libata]\n  .release_nodes+0x330/0x3f0\n  .device_release_driver_internal+0x178/0x2c0\n  .driver_detach+0x64/0xd0\n  .bus_remove_driver+0x70/0xf0\n  .driver_unregister+0x38/0x80\n  .platform_driver_unregister+0x14/0x30\n  .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl]\n  .__se_sys_delete_module+0x1ec/0x2d0\n  .system_call_exception+0xfc/0x1f0\n  system_call_common+0xf8/0x200\n ==================================================================\n\nThe triggering of the BUG is shown in the following stack:\n\ndriver_detach\n  device_release_driver_internal\n    __device_release_driver\n      drv-\u003eremove(dev) --\u003e platform_drv_remove/platform_remove\n        drv-\u003eremove(dev) --\u003e sata_fsl_remove\n          iounmap(host_priv-\u003ehcr_base);\t\t\t\u003c---- unmap\n          kfree(host_priv);                             \u003c---- free\n      devres_release_all\n        release_nodes\n          dr-\u003enode.release(dev, dr-\u003edata) --\u003e ata_host_stop\n            ap-\u003eops-\u003eport_stop(ap) --\u003e sata_fsl_port_stop\n                ioread32(hcr_base + HCONTROL)           \u003c---- UAF\n            host-\u003eops-\u003ehost_stop(host)\n\nThe iounmap(host_priv-\u003ehcr_base) and kfree(host_priv) functions should\nnot be executed in drv-\u003eremove. These functions should be executed in\nhost_stop after port_stop. Therefore, we move these functions to the\nnew function sata_fsl_host_stop and bind the new function to host_stop."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: sata_fsl: corrige UAF en sata_fsl_port_stop cuando rmmod sata_fsl Cuando se ejecuta el comando `rmmod sata_fsl.ko` en el PPC64 GNU/Linux se reporta un error: ====== ==================================================== ========== ERROR: No se puede manejar el acceso a los datos del kernel al leer en 0x80000800805b502c Ups: Acceso al kernel del \u00e1rea defectuosa, firma: 11 [#1] NIP [c0000000000388a4] .ioread32+0x4/0x20 LR [80000000000c6034 ] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl] Seguimiento de llamadas: .free_irq+0x1c/0x4e0 (no confiable) .ata_host_stop+0x74/0xd0 [libata] .release_nodes+0x330/0x3f0 .device_release_driver_internal+0x178/0x2c0. driver_detach+0x64/0xd0 . bus_remove_driver+0x70/0xf0 .driver_unregister+0x38/0x80 .platform_driver_unregister+0x14/0x30 .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl] .__se_sys_delete_module+0x1ec/0x2d0 .system_call_exception+ 0xfc/0x1f0 system_call_common+0xf8/0x200 ======= ==================================================== ========= La activaci\u00f3n del ERROR se muestra en la siguiente pila: driver_detach device_release_driver_internal __device_release_driver drv-\u0026gt;remove(dev) --\u0026gt; platform_drv_remove/platform_remove drv-\u0026gt;remove(dev) --\u0026gt; sata_fsl_remove iounmap( host_priv-\u0026gt;hcr_base); \u0026lt;---- desasignar kfree(host_priv); \u0026lt;---- free devres_release_all release_nodes dr-\u0026gt;node.release(dev, dr-\u0026gt;data) --\u0026gt; ata_host_stop ap-\u0026gt;ops-\u0026gt;port_stop(ap) --\u0026gt; sata_fsl_port_stop ioread32(hcr_base + HCONTROL) \u0026lt;--- - UAF host-\u0026gt;ops-\u0026gt;host_stop(host) Las funciones iounmap(host_priv-\u0026gt;hcr_base) y kfree(host_priv) no deben ejecutarse en drv-\u0026gt;remove. Estas funciones deben ejecutarse en host_stop despu\u00e9s de port_stop. Por lo tanto, movemos estas funciones a la nueva funci\u00f3n sata_fsl_host_stop y vinculamos la nueva funci\u00f3n a host_stop."
    }
  ],
  "id": "CVE-2021-47549",
  "lastModified": "2025-01-07T17:04:16.397",
  "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": "2024-05-24T15:15:19.773",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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