cve-2024-26851
Vulnerability from cvelistv5
Published
2024-04-17 10:17
Modified
2024-08-02 00:14
Severity
Summary
netfilter: nf_conntrack_h323: Add protection for bmp length out of range
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website


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                "role": "CISA Coordinator",
                "timestamp": "2024-06-12T17:33:25.792652Z",
                "version": "2.0.3"
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        "title": "CISA ADP Vulnrichment"
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          "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\u003cnet/netfilter/nf_conntrack_h323_asn1.c:0\u003e\nvmlinux   decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:592\u003e\nvmlinux   decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\nvmlinux   decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:576\u003e\nvmlinux   decode_choice(base=0xFFFFFFD008037280, level=0) + 1216\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\nvmlinux   DecodeRasMessage() + 304\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:833\u003e\nvmlinux   ras_help() + 684\n\u003cnet/netfilter/nf_conntrack_h323_main.c:1728\u003e\nvmlinux   nf_confirm() + 188\n\u003cnet/netfilter/nf_conntrack_proto.c:137\u003e\n\nDue to abnormal data in skb-\u003edata, 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."
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      "title": "netfilter: nf_conntrack_h323: Add protection for bmp length out of range",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26851",
    "datePublished": "2024-04-17T10:17:15.298Z",
    "dateReserved": "2024-02-19T14:20:24.183Z",
    "dateUpdated": "2024-08-02T00:14:13.704Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26851\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-17T11:15:08.473\",\"lastModified\":\"2024-06-27T13:15:56.800\",\"vulnStatus\":\"Awaiting Analysis\",\"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\u003cnet/netfilter/nf_conntrack_h323_asn1.c:0\u003e\\nvmlinux   decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:592\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:576\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD008037280, level=0) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   DecodeRasMessage() + 304\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:833\u003e\\nvmlinux   ras_help() + 684\\n\u003cnet/netfilter/nf_conntrack_h323_main.c:1728\u003e\\nvmlinux   nf_confirm() + 188\\n\u003cnet/netfilter/nf_conntrack_proto.c:137\u003e\\n\\nDue to abnormal data in skb-\u003edata, 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-\u0026gt;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\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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