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nvd-json-data-feeds/CVE-2024/CVE-2024-466xx/CVE-2024-46676.json
cad-safe-bot e6cbafdc40 Auto-Update: 2024-12-08T03:00:18.988682+00:00
2024-12-08 03:06:42 +00:00

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{
"id": "CVE-2024-46676",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-09-13T06:15:12.223",
"lastModified": "2024-09-23T14:42:38.230",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: pn533: Add poll mod list filling check\n\nIn case of im_protocols value is 1 and tm_protocols value is 0 this\ncombination successfully passes the check\n'if (!im_protocols && !tm_protocols)' in the nfc_start_poll().\nBut then after pn533_poll_create_mod_list() call in pn533_start_poll()\npoll mod list will remain empty and dev->poll_mod_count will remain 0\nwhich lead to division by zero.\n\nNormally no im protocol has value 1 in the mask, so this combination is\nnot expected by driver. But these protocol values actually come from\nuserspace via Netlink interface (NFC_CMD_START_POLL operation). So a\nbroken or malicious program may pass a message containing a \"bad\"\ncombination of protocol parameter values so that dev->poll_mod_count\nis not incremented inside pn533_poll_create_mod_list(), thus leading\nto division by zero.\nCall trace looks like:\nnfc_genl_start_poll()\n nfc_start_poll()\n ->start_poll()\n pn533_start_poll()\n\nAdd poll mod list filling check.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfc: pn533: A\u00f1adir comprobaci\u00f3n de llenado de lista de mod de sondeo En caso de que el valor de im_protocols sea 1 y el valor de tm_protocols sea 0, esta combinaci\u00f3n pasa con \u00e9xito la comprobaci\u00f3n 'if (!im_protocols && !tm_protocols)' en nfc_start_poll(). Pero luego, despu\u00e9s de la llamada a pn533_poll_create_mod_list() en pn533_start_poll(), la lista de mod de sondeo permanecer\u00e1 vac\u00eda y dev->poll_mod_count permanecer\u00e1 en 0, lo que conduce a la divisi\u00f3n por cero. Normalmente, ning\u00fan protocolo im tiene el valor 1 en la m\u00e1scara, por lo que el controlador no espera esta combinaci\u00f3n. Pero estos valores de protocolo en realidad provienen del espacio de usuario a trav\u00e9s de la interfaz Netlink (operaci\u00f3n NFC_CMD_START_POLL). Por lo tanto, un programa da\u00f1ado o malicioso puede enviar un mensaje que contenga una combinaci\u00f3n \"mala\" de valores de par\u00e1metros de protocolo, de modo que dev->poll_mod_count no se incremente dentro de pn533_poll_create_mod_list(), lo que lleva a una divisi\u00f3n por cero. El seguimiento de la llamada se ve as\u00ed: nfc_genl_start_poll() nfc_start_poll() ->start_poll() pn533_start_poll() Agregar comprobaci\u00f3n de llenado de la lista de mods de sondeo. Encontrado por Linux Verification Center (linuxtesting.org) con SVACE."
}
],
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{
"source": "nvd@nist.gov",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
]
},
"weaknesses": [
{
"source": "nvd@nist.gov",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-369"
}
]
}
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