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nvd-json-data-feeds/CVE-2024/CVE-2024-268xx/CVE-2024-26851.json
cad-safe-bot bb3cc104d9 Auto-Update: 2025-04-02T14:00:20.434942+00:00
2025-04-02 14:03:56 +00:00

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{
"id": "CVE-2024-26851",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-04-17T11:15:08.473",
"lastModified": "2025-04-02T13:17:19.553",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_h323: Add protection for bmp length out of range\n\nUBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts\nthat are out of bounds for their data type.\n\nvmlinux get_bitmap(b=75) + 712\n<net/netfilter/nf_conntrack_h323_asn1.c:0>\nvmlinux decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956\n<net/netfilter/nf_conntrack_h323_asn1.c:592>\nvmlinux decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216\n<net/netfilter/nf_conntrack_h323_asn1.c:814>\nvmlinux decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812\n<net/netfilter/nf_conntrack_h323_asn1.c:576>\nvmlinux decode_choice(base=0xFFFFFFD008037280, level=0) + 1216\n<net/netfilter/nf_conntrack_h323_asn1.c:814>\nvmlinux DecodeRasMessage() + 304\n<net/netfilter/nf_conntrack_h323_asn1.c:833>\nvmlinux ras_help() + 684\n<net/netfilter/nf_conntrack_h323_main.c:1728>\nvmlinux nf_confirm() + 188\n<net/netfilter/nf_conntrack_proto.c:137>\n\nDue to abnormal data in skb->data, the extension bitmap length\nexceeds 32 when decoding ras message then uses the length to make\na shift operation. It will change into negative after several loop.\nUBSAN load could detect a negative shift as an undefined behaviour\nand reports exception.\nSo we add the protection to avoid the length exceeding 32. Or else\nit will return out of range error and stop decoding."
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: netfilter: nf_conntrack_h323: Agregar protecci\u00f3n para longitud de bmp fuera de rango La carga de UBSAN informa una excepci\u00f3n de BRK#5515 SHIFT_ISSUE: desplazamientos bit a bit que est\u00e1n fuera de los l\u00edmites para su tipo de datos. vmlinux get_bitmap(b=75) + 712 vmlinux decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, nivel=134443100) + 1956 vmlinux decode_choice (base=0xFFFFFFD0080370F0, nivel=23843636) + 1216 vmlinux decode_seq(f=0xFFFFFFD0080371A8, nivel=134443500) + 812 vmlinux decode_choice(base =0xFFFFFFD008037280, nivel=0) + 1216 vmlinux DecodeRasMessage() + 304 vmlinux ras_help() + 684 vmlinux nf_confirm() + 188 Debido a datos anormales en skb-&gt;data, la longitud del mapa de bits de la extensi\u00f3n excede 32 cuando se decodifica el mensaje ras y luego usa la longitud para realizar una operaci\u00f3n de cambio . Cambiar\u00e1 a negativo despu\u00e9s de varios bucles. La carga de UBSAN podr\u00eda detectar un cambio negativo como un comportamiento indefinido e informar una excepci\u00f3n. Por lo tanto, agregamos la protecci\u00f3n para evitar que la longitud exceda 32. De lo contrario, devolver\u00e1 un error fuera de rango y dejar\u00e1 de decodificar."
}
],
"metrics": {
"cvssMetricV31": [
{
"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-787"
}
]
}
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