fkie_cve-2024-58100
Vulnerability from fkie_nvd
Published
2025-05-05 15:15
Modified
2025-05-09 08:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: check changes_pkt_data property for extension programs When processing calls to global sub-programs, verifier decides whether to invalidate all packet pointers in current state depending on the changes_pkt_data property of the global sub-program. Because of this, an extension program replacing a global sub-program must be compatible with changes_pkt_data property of the sub-program being replaced. This commit: - adds changes_pkt_data flag to struct bpf_prog_aux: - this flag is set in check_cfg() for main sub-program; - in jit_subprogs() for other sub-programs; - modifies bpf_check_attach_btf_id() to check changes_pkt_data flag; - moves call to check_attach_btf_id() after the call to check_cfg(), because it needs changes_pkt_data flag to be set: bpf_check: ... ... - check_attach_btf_id resolve_pseudo_ldimm64 resolve_pseudo_ldimm64 --> bpf_prog_is_offloaded bpf_prog_is_offloaded check_cfg check_cfg + check_attach_btf_id ... ... The following fields are set by check_attach_btf_id(): - env->ops - prog->aux->attach_btf_trace - prog->aux->attach_func_name - prog->aux->attach_func_proto - prog->aux->dst_trampoline - prog->aux->mod - prog->aux->saved_dst_attach_type - prog->aux->saved_dst_prog_type - prog->expected_attach_type Neither of these fields are used by resolve_pseudo_ldimm64() or bpf_prog_offload_verifier_prep() (for netronome and netdevsim drivers), so the reordering is safe.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3846e2bea565ee1c5195dcc625fda9868fb0e3b3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7197fc4acdf238ec8ad06de5a8235df0c1f9c7d7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/81f6d0530ba031b5f038a091619bf2ff29568852
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: check changes_pkt_data property for extension programs\n\nWhen processing calls to global sub-programs, verifier decides whether\nto invalidate all packet pointers in current state depending on the\nchanges_pkt_data property of the global sub-program.\n\nBecause of this, an extension program replacing a global sub-program\nmust be compatible with changes_pkt_data property of the sub-program\nbeing replaced.\n\nThis commit:\n- adds changes_pkt_data flag to struct bpf_prog_aux:\n  - this flag is set in check_cfg() for main sub-program;\n  - in jit_subprogs() for other sub-programs;\n- modifies bpf_check_attach_btf_id() to check changes_pkt_data flag;\n- moves call to check_attach_btf_id() after the call to check_cfg(),\n  because it needs changes_pkt_data flag to be set:\n\n    bpf_check:\n      ...                             ...\n    - check_attach_btf_id             resolve_pseudo_ldimm64\n      resolve_pseudo_ldimm64   --\u003e    bpf_prog_is_offloaded\n      bpf_prog_is_offloaded           check_cfg\n      check_cfg                     + check_attach_btf_id\n      ...                             ...\n\nThe following fields are set by check_attach_btf_id():\n- env-\u003eops\n- prog-\u003eaux-\u003eattach_btf_trace\n- prog-\u003eaux-\u003eattach_func_name\n- prog-\u003eaux-\u003eattach_func_proto\n- prog-\u003eaux-\u003edst_trampoline\n- prog-\u003eaux-\u003emod\n- prog-\u003eaux-\u003esaved_dst_attach_type\n- prog-\u003eaux-\u003esaved_dst_prog_type\n- prog-\u003eexpected_attach_type\n\nNeither of these fields are used by resolve_pseudo_ldimm64() or\nbpf_prog_offload_verifier_prep() (for netronome and netdevsim\ndrivers), so the reordering is safe."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: comprobar la propiedad changes_pkt_data para programas de extensi\u00f3n Al procesar llamadas a subprogramas globales, el verificador decide si invalidar todos los punteros de paquete en el estado actual dependiendo de la propiedad changes_pkt_data del subprograma global. Debido a esto, un programa de extensi\u00f3n que reemplaza un subprograma global debe ser compatible con la propiedad changes_pkt_data del subprograma que se est\u00e1 reemplazando. Esta confirmaci\u00f3n: - a\u00f1ade el indicador changes_pkt_data a struct bpf_prog_aux: - este indicador se establece en check_cfg() para el subprograma principal; - en jit_subprogs() para otros subprogramas; - modifica bpf_check_attach_btf_id() para comprobar el indicador changes_pkt_data; - mueve la llamada a check_attach_btf_id() despu\u00e9s de la llamada a check_cfg(), porque necesita que se configure el indicador changes_pkt_data: bpf_check: ... ... - check_attach_btf_id resolve_pseudo_ldimm64 resolve_pseudo_ldimm64 --\u0026gt; bpf_prog_is_offloaded bpf_prog_is_offloaded check_cfg check_cfg + check_attach_btf_id ... ... Los siguientes campos se configuran mediante check_attach_btf_id(): - env-\u0026gt;ops - prog-\u0026gt;aux-\u0026gt;attach_btf_trace - prog-\u0026gt;aux-\u0026gt;attach_func_name - prog-\u0026gt;aux-\u0026gt;attach_func_proto - prog-\u0026gt;aux-\u0026gt;dst_trampoline - prog-\u0026gt;aux-\u0026gt;mod - prog-\u0026gt;aux-\u0026gt;saved_dst_attach_type - prog-\u0026gt;aux-\u0026gt;saved_dst_prog_type - prog-\u0026gt;expected_attach_type Ninguno de estos campos es utilizado por resolve_pseudo_ldimm64() o bpf_prog_offload_verifier_prep() (para los controladores netronome y netdevsim), por lo que el reordenamiento es seguro."
    }
  ],
  "id": "CVE-2024-58100",
  "lastModified": "2025-05-09T08:15:18.937",
  "metrics": {},
  "published": "2025-05-05T15:15:53.913",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3846e2bea565ee1c5195dcc625fda9868fb0e3b3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7197fc4acdf238ec8ad06de5a8235df0c1f9c7d7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/81f6d0530ba031b5f038a091619bf2ff29568852"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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