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nvd-json-data-feeds/CVE-2021/CVE-2021-470xx/CVE-2021-47068.json
cad-safe-bot 8286a3e3b8 Auto-Update: 2024-12-10T21:00:26.680303+00:00
2024-12-10 21:03:48 +00:00

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{
"id": "CVE-2021-47068",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-02-29T23:15:08.170",
"lastModified": "2024-12-10T19:50:49.147",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/nfc: fix use-after-free llcp_sock_bind/connect\n\nCommits 8a4cd82d (\"nfc: fix refcount leak in llcp_sock_connect()\")\nand c33b1cc62 (\"nfc: fix refcount leak in llcp_sock_bind()\")\nfixed a refcount leak bug in bind/connect but introduced a\nuse-after-free if the same local is assigned to 2 different sockets.\n\nThis can be triggered by the following simple program:\n int sock1 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP );\n int sock2 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP );\n memset( &addr, 0, sizeof(struct sockaddr_nfc_llcp) );\n addr.sa_family = AF_NFC;\n addr.nfc_protocol = NFC_PROTO_NFC_DEP;\n bind( sock1, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) )\n bind( sock2, (struct sockaddr*) &addr, sizeof(struct sockaddr_nfc_llcp) )\n close(sock1);\n close(sock2);\n\nFix this by assigning NULL to llcp_sock->local after calling\nnfc_llcp_local_put.\n\nThis addresses CVE-2021-23134."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/nfc: corrige use-after-free llcp_sock_bind/connect Commits 8a4cd82d (\"nfc: corrige la fuga de refcount en llcp_sock_connect()\") y c33b1cc62 (\"nfc: corrige la fuga de refcount en llcp_sock_bind()\") corrigi\u00f3 un error de fuga de recuento en bind/connect pero introdujo un Use-After-Free si el mismo local est\u00e1 asignado a 2 sockets diferentes. Esto puede activarse mediante el siguiente programa simple: int sock1 = socket( AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP ); int sock2 = conector (AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP); memset( &addr, 0, sizeof(struct sockaddr_nfc_llcp) ); addr.sa_family = AF_NFC; addr.nfc_protocol = NFC_PROTO_NFC_DEP; bind( sock1, (struct sockaddr*) & addr, sizeof(struct sockaddr_nfc_llcp) ) bind( sock2, (struct sockaddr*) & addr, sizeof(struct sockaddr_nfc_llcp) ) close(sock1); cerrar(calcet\u00edn2); Solucione este problema asignando NULL a llcp_sock->local despu\u00e9s de llamar a nfc_llcp_local_put. Esto aborda CVE-2021-23134."
}
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"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
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"source": "nvd@nist.gov",
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"description": [
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"lang": "en",
"value": "CWE-416"
}
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