fkie_cve-2021-47269
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2024-12-24 16:33
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: usb: dwc3: ep0: fix NULL pointer exception There is no validation of the index from dwc3_wIndex_to_dep() and we might be referring a non-existing ep and trigger a NULL pointer exception. In certain configurations we might use fewer eps and the index might wrongly indicate a larger ep index than existing. By adding this validation from the patch we can actually report a wrong index back to the caller. In our usecase we are using a composite device on an older kernel, but upstream might use this fix also. Unfortunately, I cannot describe the hardware for others to reproduce the issue as it is a proprietary implementation. [ 82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4 [ 82.966891] Mem abort info: [ 82.969663] ESR = 0x96000006 [ 82.972703] Exception class = DABT (current EL), IL = 32 bits [ 82.978603] SET = 0, FnV = 0 [ 82.981642] EA = 0, S1PTW = 0 [ 82.984765] Data abort info: [ 82.987631] ISV = 0, ISS = 0x00000006 [ 82.991449] CM = 0, WnR = 0 [ 82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc [ 83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000 [ 83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP [ 83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c) [ 83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1 [ 83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO) [ 83.049628] pc : dwc3_ep0_handle_feature+0x414/0x43c [ 83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94 ... [ 83.141788] Call trace: [ 83.144227] dwc3_ep0_handle_feature+0x414/0x43c [ 83.148823] dwc3_ep0_interrupt+0x3b4/0xc94 [ 83.181546] ---[ end trace aac6b5267d84c32f ]---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/366369b89bedd59b1425386e8d4a18a466e420e4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/470403639114895e2697c766fbe17be8d0e9b67aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60156089f07e724e4dc8483702d5e1ede4522749Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/788755756dd4a6aba1de479fec20b0fa600e7f19Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96b74a99d360235c24052f1d060e64ac53f43528Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/990dc90750772622d44ca2ea6652c521e6f67e16Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd551e7c85939de2182010273450bfa78c3742fcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d00889080ab60051627dab1d85831cd9db750e2aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/366369b89bedd59b1425386e8d4a18a466e420e4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/470403639114895e2697c766fbe17be8d0e9b67aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/60156089f07e724e4dc8483702d5e1ede4522749Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/788755756dd4a6aba1de479fec20b0fa600e7f19Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/96b74a99d360235c24052f1d060e64ac53f43528Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/990dc90750772622d44ca2ea6652c521e6f67e16Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bd551e7c85939de2182010273450bfa78c3742fcPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d00889080ab60051627dab1d85831cd9db750e2aPatch
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 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2A209A4F-1F96-4D92-BCA6-A12D00C4404B",
              "versionEndExcluding": "4.4.273",
              "vulnerable": true
            },
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              "versionStartIncluding": "4.5",
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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\nusb: dwc3: ep0: fix NULL pointer exception\n\nThere is no validation of the index from dwc3_wIndex_to_dep() and we might\nbe referring a non-existing ep and trigger a NULL pointer exception. In\ncertain configurations we might use fewer eps and the index might wrongly\nindicate a larger ep index than existing.\n\nBy adding this validation from the patch we can actually report a wrong\nindex back to the caller.\n\nIn our usecase we are using a composite device on an older kernel, but\nupstream might use this fix also. Unfortunately, I cannot describe the\nhardware for others to reproduce the issue as it is a proprietary\nimplementation.\n\n[   82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4\n[   82.966891] Mem abort info:\n[   82.969663]   ESR = 0x96000006\n[   82.972703]   Exception class = DABT (current EL), IL = 32 bits\n[   82.978603]   SET = 0, FnV = 0\n[   82.981642]   EA = 0, S1PTW = 0\n[   82.984765] Data abort info:\n[   82.987631]   ISV = 0, ISS = 0x00000006\n[   82.991449]   CM = 0, WnR = 0\n[   82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc\n[   83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000\n[   83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP\n[   83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c)\n[   83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1\n[   83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO)\n[   83.049628] pc : dwc3_ep0_handle_feature+0x414/0x43c\n[   83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94\n\n...\n\n[   83.141788] Call trace:\n[   83.144227]  dwc3_ep0_handle_feature+0x414/0x43c\n[   83.148823]  dwc3_ep0_interrupt+0x3b4/0xc94\n[   83.181546] ---[ end trace aac6b5267d84c32f ]---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: dwc3: ep0: corrige excepci\u00f3n de puntero NULL. No hay validaci\u00f3n del \u00edndice desde dwc3_wIndex_to_dep() y podr\u00edamos estar haciendo referencia a un ep inexistente y desencadenar una excepci\u00f3n de puntero NULL. En ciertas configuraciones, podr\u00edamos usar menos eps y el \u00edndice podr\u00eda indicar err\u00f3neamente un \u00edndice ep mayor que el existente. Al agregar esta validaci\u00f3n del parche, podemos informar un \u00edndice incorrecto a la persona que llama. En nuestro caso de uso, estamos usando un dispositivo compuesto en un kernel m\u00e1s antiguo, pero el nivel superior tambi\u00e9n podr\u00eda usar esta soluci\u00f3n. Desafortunadamente, no puedo describir el hardware para que otros reproduzcan el problema ya que es una implementaci\u00f3n propietaria. [82.958261] No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 00000000000000a4 [82.966891] Informaci\u00f3n de cancelaci\u00f3n de memoria: [82.969663] ESR = 0x96000006 [82.972703] Clase de excepci\u00f3n = DABT (EL actual), IL = 32 bits [ 82.9 78603] CONFIGURAR = 0, FnV = 0 [82.981642] EA = 0, S1PTW = 0 [82.984765] Informaci\u00f3n de cancelaci\u00f3n de datos: [82.987631] ISV = 0, ISS = 0x00000006 [82.991449] CM = 0, WnR = 0 [82.994409] tabla de usuario 4k: p\u00e1ginas, 39 VA de bits, pgdp = 00000000c6210ccc [ 83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000 [ 83.00 9685] Error interno: Oops: 96000006 [#1] SMP PREEMPTO [83.026433] Proceso irq/62-dwc3 (pid : 303, l\u00edmite de pila = 0x000000003985154c) [83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 No contaminado 4.19.124 #1 [83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO) [ 49628] ordenador personal: dwc3_ep0_handle_feature+0x414/0x43c [ 83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94 ... [ 83.141788] Rastreo de llamadas: [ 83.144227] dwc3_ep0_handle_feature+0x414/0x43c [ 83.148 823] dwc3_ep0_interrupt+0x3b4/0xc94 [83.181546] ---[ final de seguimiento aac6b5267d84c32f ]---"
    }
  ],
  "id": "CVE-2021-47269",
  "lastModified": "2024-12-24T16:33:36.863",
  "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": "2024-05-21T15:15:15.470",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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