nvd-json-data-feeds/CVE-2024/CVE-2024-409xx/CVE-2024-40957.json

{
  "id": "CVE-2024-40957",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-07-12T13:15:17.823",
  "lastModified": "2024-08-28T18:58:59.793",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nseg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors\n\ninput_action_end_dx4() and input_action_end_dx6() are called NF_HOOK() for\nPREROUTING hook, in PREROUTING hook, we should passing a valid indev,\nand a NULL outdev to NF_HOOK(), otherwise may trigger a NULL pointer\ndereference, as below:\n\n    [74830.647293] BUG: kernel NULL pointer dereference, address: 0000000000000090\n    [74830.655633] #PF: supervisor read access in kernel mode\n    [74830.657888] #PF: error_code(0x0000) - not-present page\n    [74830.659500] PGD 0 P4D 0\n    [74830.660450] Oops: 0000 [#1] PREEMPT SMP PTI\n    ...\n    [74830.664953] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\n    [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n    ...\n    [74830.689725] Call Trace:\n    [74830.690402]  <IRQ>\n    [74830.690953]  ? show_trace_log_lvl+0x1c4/0x2df\n    [74830.692020]  ? show_trace_log_lvl+0x1c4/0x2df\n    [74830.693095]  ? ipt_do_table+0x286/0x710 [ip_tables]\n    [74830.694275]  ? __die_body.cold+0x8/0xd\n    [74830.695205]  ? page_fault_oops+0xac/0x140\n    [74830.696244]  ? exc_page_fault+0x62/0x150\n    [74830.697225]  ? asm_exc_page_fault+0x22/0x30\n    [74830.698344]  ? rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n    [74830.699540]  ipt_do_table+0x286/0x710 [ip_tables]\n    [74830.700758]  ? ip6_route_input+0x19d/0x240\n    [74830.701752]  nf_hook_slow+0x3f/0xb0\n    [74830.702678]  input_action_end_dx4+0x19b/0x1e0\n    [74830.703735]  ? input_action_end_t+0xe0/0xe0\n    [74830.704734]  seg6_local_input_core+0x2d/0x60\n    [74830.705782]  lwtunnel_input+0x5b/0xb0\n    [74830.706690]  __netif_receive_skb_one_core+0x63/0xa0\n    [74830.707825]  process_backlog+0x99/0x140\n    [74830.709538]  __napi_poll+0x2c/0x160\n    [74830.710673]  net_rx_action+0x296/0x350\n    [74830.711860]  __do_softirq+0xcb/0x2ac\n    [74830.713049]  do_softirq+0x63/0x90\n\ninput_action_end_dx4() passing a NULL indev to NF_HOOK(), and finally\ntrigger a NULL dereference in rpfilter_mt()->rpfilter_is_loopback():\n\n    static bool\n    rpfilter_is_loopback(const struct sk_buff *skb,\n          \t       const struct net_device *in)\n    {\n            // in is NULL\n            return skb->pkt_type == PACKET_LOOPBACK ||\n          \t in->flags & IFF_LOOPBACK;\n    }"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: seg6: corrige el paso de par\u00e1metros al llamar a NF_HOOK() en los comportamientos End.DX4 y End.DX6 input_action_end_dx4() y input_action_end_dx6() se llaman NF_HOOK() para el gancho PREROUTING, en el gancho PREROUTING , debemos pasar un indev v\u00e1lido y un outdev NULL a NF_HOOK(); de lo contrario, podemos desencadenar una desreferencia del puntero NULL, como se muestra a continuaci\u00f3n: [74830.647293] ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000090 [74830.655633] #PF: acceso de lectura del supervisor en modo kernel [74830.657888] #PF: error_code(0x0000) - p\u00e1gina no presente [74830.659500] PGD 0 P4D 0 [74830.660450] Ups: 0000 [#1] PREEMPT SMP PTI... [74830.664953] Nombre de hardware: Red Hat KVM , BIOS 0.5.1 01/01/2011 [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter] ... [74830.689725] Seguimiento de llamadas: [74830.690402]  [74830.690953] ? show_trace_log_lvl+0x1c4/0x2df [74830.692020] ? show_trace_log_lvl+0x1c4/0x2df [74830.693095] ? ipt_do_table+0x286/0x710 [ip_tables] [74830.694275] ? __die_body.cold+0x8/0xd [74830.695205] ? page_fault_oops+0xac/0x140 [74830.696244] ? exc_page_fault+0x62/0x150 [74830.697225] ? asm_exc_page_fault+0x22/0x30 [74830.698344] ? rpfilter_mt+0x44/0x15e [ipt_rpfilter] [74830.699540] ipt_do_table+0x286/0x710 [ip_tables] [74830.700758] ? ip6_route_input+0x19d/0x240 [74830.701752] nf_hook_slow+0x3f/0xb0 [74830.702678] input_action_end_dx4+0x19b/0x1e0 [74830.703735] ? input_action_end_t+0xe0/0xe0 [74830.704734] seg6_local_input_core+0x2d/0x60 [74830.705782] lwtunnel_input+0x5b/0xb0 [74830.706690] __netif_receive_skb_one_core+0x63/0xa0 830.707825] proceso_atrasado+0x99/0x140 [74830.709538] __napi_poll+0x2c/0x160 [74830.710673] net_rx_action+ 0x296/0x350 [74830.711860] __do_softirq+0xcb/0x2ac [74830.713049] do_softirq+0x63/0x90 input_action_end_dx4() pasando un indev NULL a NF_HOOK(), y finalmente activa una desreferencia NULL en rpfilter_mt()-&gt;rpfilter_is_lo opback(): bool est\u00e1tico rpfilter_is_loopback (const struct sk_buff *skb, const struct net_device *in) { // in es NULL return skb-&gt;pkt_type == PACKET_LOOPBACK || en-&gt;flags &amp; IFF_LOOPBACK; }"
    }
  ],
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    "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",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
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