fkie_cve-2024-41006
Vulnerability from fkie_nvd
Published
2024-07-12 13:15
Modified
2024-11-21 09:32
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: netrom: Fix a memory leak in nr_heartbeat_expiry() syzbot reported a memory leak in nr_create() [0]. Commit 409db27e3a2e ("netrom: Fix use-after-free of a listening socket.") added sock_hold() to the nr_heartbeat_expiry() function, where a) a socket has a SOCK_DESTROY flag or b) a listening socket has a SOCK_DEAD flag. But in the case "a," when the SOCK_DESTROY flag is set, the file descriptor has already been closed and the nr_release() function has been called. So it makes no sense to hold the reference count because no one will call another nr_destroy_socket() and put it as in the case "b." nr_connect nr_establish_data_link nr_start_heartbeat nr_release switch (nr->state) case NR_STATE_3 nr->state = NR_STATE_2 sock_set_flag(sk, SOCK_DESTROY); nr_rx_frame nr_process_rx_frame switch (nr->state) case NR_STATE_2 nr_state2_machine() nr_disconnect() nr_sk(sk)->state = NR_STATE_0 sock_set_flag(sk, SOCK_DEAD) nr_heartbeat_expiry switch (nr->state) case NR_STATE_0 if (sock_flag(sk, SOCK_DESTROY) || (sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) sock_hold() // ( !!! ) nr_destroy_socket() To fix the memory leak, let's call sock_hold() only for a listening socket. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with Syzkaller. [0]: https://syzkaller.appspot.com/bug?extid=d327a1f3b12e1e206c16
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0b9130247f3b6a1122478471ff0e014ea96bb735Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/280cf1173726a7059b628c610c71050d5c0b6937Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5391f9db2cab5ef1cb411be1ab7dbec728078fbaMailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a02fd5d775cf9787ee7698c797e20f2fa13d2e2bMailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b6ebe4fed73eedeb73f4540f8edc4871945474c8Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d377f5a28332954b19e373d36823e59830ab1712Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d616876256b38ecf9a1a1c7d674192c5346bc69cMailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e07a9c2a850cdebf625e7a1b8171bd23a8554313Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0b9130247f3b6a1122478471ff0e014ea96bb735Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/280cf1173726a7059b628c610c71050d5c0b6937Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5391f9db2cab5ef1cb411be1ab7dbec728078fbaMailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a02fd5d775cf9787ee7698c797e20f2fa13d2e2bMailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b6ebe4fed73eedeb73f4540f8edc4871945474c8Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d377f5a28332954b19e373d36823e59830ab1712Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d616876256b38ecf9a1a1c7d674192c5346bc69cMailing List, Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e07a9c2a850cdebf625e7a1b8171bd23a8554313Mailing List, Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.10
linux linux_kernel 6.10
linux linux_kernel 6.10
linux linux_kernel 6.10


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: Fix a memory leak in nr_heartbeat_expiry()\n\nsyzbot reported a memory leak in nr_create() [0].\n\nCommit 409db27e3a2e (\"netrom: Fix use-after-free of a listening socket.\")\nadded sock_hold() to the nr_heartbeat_expiry() function, where\na) a socket has a SOCK_DESTROY flag or\nb) a listening socket has a SOCK_DEAD flag.\n\nBut in the case \"a,\" when the SOCK_DESTROY flag is set, the file descriptor\nhas already been closed and the nr_release() function has been called.\nSo it makes no sense to hold the reference count because no one will\ncall another nr_destroy_socket() and put it as in the case \"b.\"\n\nnr_connect\n  nr_establish_data_link\n    nr_start_heartbeat\n\nnr_release\n  switch (nr-\u003estate)\n  case NR_STATE_3\n    nr-\u003estate = NR_STATE_2\n    sock_set_flag(sk, SOCK_DESTROY);\n\n                        nr_rx_frame\n                          nr_process_rx_frame\n                            switch (nr-\u003estate)\n                            case NR_STATE_2\n                              nr_state2_machine()\n                                nr_disconnect()\n                                  nr_sk(sk)-\u003estate = NR_STATE_0\n                                  sock_set_flag(sk, SOCK_DEAD)\n\n                        nr_heartbeat_expiry\n                          switch (nr-\u003estate)\n                          case NR_STATE_0\n                            if (sock_flag(sk, SOCK_DESTROY) ||\n                               (sk-\u003esk_state == TCP_LISTEN\n                                 \u0026\u0026 sock_flag(sk, SOCK_DEAD)))\n                               sock_hold()  // ( !!! )\n                               nr_destroy_socket()\n\nTo fix the memory leak, let\u0027s call sock_hold() only for a listening socket.\n\nFound by InfoTeCS on behalf of Linux Verification Center\n(linuxtesting.org) with Syzkaller.\n\n[0]: https://syzkaller.appspot.com/bug?extid=d327a1f3b12e1e206c16"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: netrom: corrige una p\u00e9rdida de memoria en nr_heartbeat_expiry() syzbot inform\u00f3 una p\u00e9rdida de memoria en nr_create() [0]. El commit 409db27e3a2e (\"netrom: Reparar el use-after-free de un socket de escucha\") agreg\u00f3 sock_hold() a la funci\u00f3n nr_heartbeat_expiry(), donde a) un socket tiene un indicador SOCK_DESTROY ob) un socket de escucha tiene un indicador SOCK_DEAD. Pero en el caso \"a\", cuando se establece el indicador SOCK_DESTROY, el descriptor de archivo ya se ha cerrado y se ha llamado a la funci\u00f3n nr_release(). Por lo tanto, no tiene sentido mantener el recuento de referencias porque nadie llamar\u00e1 a otro nr_destroy_socket() y lo pondr\u00e1 como en el caso \"b\". nr_connect nr_establecer_data_link nr_start_heartbeat nr_release interruptor (nr-\u0026gt;estado) caso NR_STATE_3 nr-\u0026gt;estado = NR_STATE_2 sock_set_flag(sk, SOCK_DESTROY); nr_rx_frame nr_process_rx_frame interruptor (nr-\u0026gt;estado) caso NR_STATE_2 nr_state2_machine() nr_disconnect() nr_sk(sk)-\u0026gt;estado = NR_STATE_0 sock_set_flag(sk, SOCK_DEAD) nr_heartbeat_expiry interruptor (nr-\u0026gt;estado) caso NR_STATE_0 if (sock_flag(sk, OCK_DESTROY) || (sk-\u0026gt;sk_state == TCP_LISTEN \u0026amp;\u0026amp; sock_flag(sk, SOCK_DEAD))) sock_hold() // ( !!! ) nr_destroy_socket() Para solucionar la p\u00e9rdida de memoria, llamemos a sock_hold() solo para un socket de escucha. Encontrado por InfoTeCS en nombre del Centro de verificaci\u00f3n de Linux (linuxtesting.org) con Syzkaller. [0]: https://syzkaller.appspot.com/bug?extid=d327a1f3b12e1e206c16"
    }
  ],
  "id": "CVE-2024-41006",
  "lastModified": "2024-11-21T09:32:03.057",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-07-12T13:15:21.370",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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