nvd-json-data-feeds/CVE-2024/CVE-2024-369xx/CVE-2024-36971.json

{
  "id": "CVE-2024-36971",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-06-10T09:15:09.127",
  "lastModified": "2024-08-08T14:49:52.603",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "cisaExploitAdd": "2024-08-07",
  "cisaActionDue": "2024-08-28",
  "cisaRequiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
  "cisaVulnerabilityName": "Android Kernel Remote Code Execution Vulnerability",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix __dst_negative_advice() race\n\n__dst_negative_advice() does not enforce proper RCU rules when\nsk->dst_cache must be cleared, leading to possible UAF.\n\nRCU rules are that we must first clear sk->sk_dst_cache,\nthen call dst_release(old_dst).\n\nNote that sk_dst_reset(sk) is implementing this protocol correctly,\nwhile __dst_negative_advice() uses the wrong order.\n\nGiven that ip6_negative_advice() has special logic\nagainst RTF_CACHE, this means each of the three ->negative_advice()\nexisting methods must perform the sk_dst_reset() themselves.\n\nNote the check against NULL dst is centralized in\n__dst_negative_advice(), there is no need to duplicate\nit in various callbacks.\n\nMany thanks to Clement Lecigne for tracking this issue.\n\nThis old bug became visible after the blamed commit, using UDP sockets."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: fix __dst_negative_advice() race __dst_negative_advice() no aplica las reglas adecuadas de RCU cuando se debe borrar sk->dst_cache, lo que genera una posible UAF. Las reglas de RCU son que primero debemos borrar sk->sk_dst_cache y luego llamar a dst_release(old_dst). Tenga en cuenta que sk_dst_reset(sk) implementa este protocolo correctamente, mientras que __dst_negative_advice() utiliza el orden incorrecto. Dado que ip6_negative_advice() tiene una l\u00f3gica especial contra RTF_CACHE, esto significa que cada uno de los tres ->negative_advice() m\u00e9todos existentes debe realizar sk_dst_reset() ellos mismos. Tenga en cuenta que la verificaci\u00f3n de NULL dst est\u00e1 centralizada en __dst_negative_advice(), no es necesario duplicarla en varias devoluciones de llamada. Muchas gracias a Clement Lecigne por dar seguimiento a este problema. Este antiguo error se hizo visible despu\u00e9s de la confirmaci\u00f3n culpada, utilizando sockets UDP."
    }
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          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
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          "baseScore": 7.8,
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