nvd-json-data-feeds/CVE-2021/CVE-2021-475xx/CVE-2021-47549.json

{
  "id": "CVE-2021-47549",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-05-24T15:15:19.773",
  "lastModified": "2024-05-24T18:09:20.027",
  "vulnStatus": "Awaiting Analysis",
  "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->remove(dev) --> platform_drv_remove/platform_remove\n        drv->remove(dev) --> sata_fsl_remove\n          iounmap(host_priv->hcr_base);\t\t\t<---- unmap\n          kfree(host_priv);                             <---- free\n      devres_release_all\n        release_nodes\n          dr->node.release(dev, dr->data) --> ata_host_stop\n            ap->ops->port_stop(ap) --> sata_fsl_port_stop\n                ioread32(hcr_base + HCONTROL)           <---- UAF\n            host->ops->host_stop(host)\n\nThe iounmap(host_priv->hcr_base) and kfree(host_priv) functions should\nnot be executed in drv->remove. 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-&gt;remove(dev) --&gt; platform_drv_remove/platform_remove drv-&gt;remove(dev) --&gt; sata_fsl_remove iounmap( host_priv-&gt;hcr_base); &lt;---- desasignar kfree(host_priv); &lt;---- free devres_release_all release_nodes dr-&gt;node.release(dev, dr-&gt;data) --&gt; ata_host_stop ap-&gt;ops-&gt;port_stop(ap) --&gt; sata_fsl_port_stop ioread32(hcr_base + HCONTROL) &lt;--- - UAF host-&gt;ops-&gt;host_stop(host) Las funciones iounmap(host_priv-&gt;hcr_base) y kfree(host_priv) no deben ejecutarse en drv-&gt;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."
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}