fkie_cve-2023-52531
Vulnerability from fkie_nvd
Published
2024-03-02 22:15
Modified
2024-12-11 15:28
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: wifi: iwlwifi: mvm: Fix a memory corruption issue A few lines above, space is kzalloc()'ed for: sizeof(struct iwl_nvm_data) + sizeof(struct ieee80211_channel) + sizeof(struct ieee80211_rate) 'mvm->nvm_data' is a 'struct iwl_nvm_data', so it is fine. At the end of this structure, there is the 'channels' flex array. Each element is of type 'struct ieee80211_channel'. So only 1 element is allocated in this array. When doing: mvm->nvm_data->bands[0].channels = mvm->nvm_data->channels; We point at the first element of the 'channels' flex array. So this is fine. However, when doing: mvm->nvm_data->bands[0].bitrates = (void *)((u8 *)mvm->nvm_data->channels + 1); because of the "(u8 *)" cast, we add only 1 to the address of the beginning of the flex array. It is likely that we want point at the 'struct ieee80211_rate' allocated just after. Remove the spurious casting so that the pointer arithmetic works as expected.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7c8faa31080342aec4903c9acb20caf82fcca1efPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8ba438ef3cacc4808a63ed0ce24d4f0942cfe55dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f06cdd8d4ba5252986f51f80cc30263636397128Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7c8faa31080342aec4903c9acb20caf82fcca1efPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8ba438ef3cacc4808a63ed0ce24d4f0942cfe55dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f06cdd8d4ba5252986f51f80cc30263636397128Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.6
linux linux_kernel 6.6
linux linux_kernel 6.6
linux linux_kernel 6.6


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: Fix a memory corruption issue\n\nA few lines above, space is kzalloc()\u0027ed for:\n\tsizeof(struct iwl_nvm_data) +\n\tsizeof(struct ieee80211_channel) +\n\tsizeof(struct ieee80211_rate)\n\n\u0027mvm-\u003envm_data\u0027 is a \u0027struct iwl_nvm_data\u0027, so it is fine.\n\nAt the end of this structure, there is the \u0027channels\u0027 flex array.\nEach element is of type \u0027struct ieee80211_channel\u0027.\nSo only 1 element is allocated in this array.\n\nWhen doing:\n  mvm-\u003envm_data-\u003ebands[0].channels = mvm-\u003envm_data-\u003echannels;\nWe point at the first element of the \u0027channels\u0027 flex array.\nSo this is fine.\n\nHowever, when doing:\n  mvm-\u003envm_data-\u003ebands[0].bitrates =\n\t\t\t(void *)((u8 *)mvm-\u003envm_data-\u003echannels + 1);\nbecause of the \"(u8 *)\" cast, we add only 1 to the address of the beginning\nof the flex array.\n\nIt is likely that we want point at the \u0027struct ieee80211_rate\u0027 allocated\njust after.\n\nRemove the spurious casting so that the pointer arithmetic works as\nexpected."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: iwlwifi: mvm: soluciona un problema de corrupci\u00f3n de memoria Unas pocas l\u00edneas arriba, se kzalloc()\u0027ed espacio para: sizeof(struct iwl_nvm_data) + sizeof(struct ieee80211_channel) + sizeof (struct ieee80211_rate) \u0027mvm-\u0026gt;nvm_data\u0027 es una \u0027struct iwl_nvm_data\u0027, por lo que est\u00e1 bien. Al final de esta estructura, se encuentra la matriz flexible de \u0027canales\u0027. Cada elemento es de tipo \u0027struct ieee80211_channel\u0027. Entonces solo se asigna 1 elemento en esta matriz. Al hacer: mvm-\u0026gt;nvm_data-\u0026gt;bands[0].channels = mvm-\u0026gt;nvm_data-\u0026gt;channels; Apuntamos al primer elemento de la matriz flexible \u0027canales\u0027. Entonces esto est\u00e1 bien. Sin embargo, al hacer: mvm-\u0026gt;nvm_data-\u0026gt;bands[0].bitrates = (void *)((u8 *)mvm-\u0026gt;nvm_data-\u0026gt;channels + 1); debido a la conversi\u00f3n \"(u8 *)\", agregamos solo 1 a la direcci\u00f3n del comienzo de la matriz flexible. Es probable que queramos apuntar a la \u0027estructura ieee80211_rate\u0027 asignada justo despu\u00e9s. Retire la fundici\u00f3n espuria para que la aritm\u00e9tica del puntero funcione como se esperaba."
    }
  ],
  "id": "CVE-2023-52531",
  "lastModified": "2024-12-11T15:28:47.893",
  "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": "2024-03-02T22:15:48.613",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/f06cdd8d4ba5252986f51f80cc30263636397128"
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    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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