fkie_cve-2022-48906
Vulnerability from fkie_nvd
Published
2024-08-22 02:15
Modified
2024-09-12 13:41
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: mptcp: Correctly set DATA_FIN timeout when number of retransmits is large Syzkaller with UBSAN uncovered a scenario where a large number of DATA_FIN retransmits caused a shift-out-of-bounds in the DATA_FIN timeout calculation: ================================================================================ UBSAN: shift-out-of-bounds in net/mptcp/protocol.c:470:29 shift exponent 32 is too large for 32-bit type 'unsigned int' CPU: 1 PID: 13059 Comm: kworker/1:0 Not tainted 5.17.0-rc2-00630-g5fbf21c90c60 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Workqueue: events mptcp_worker Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 ubsan_epilogue+0xb/0x5a lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds.cold+0xb2/0x20e lib/ubsan.c:330 mptcp_set_datafin_timeout net/mptcp/protocol.c:470 [inline] __mptcp_retrans.cold+0x72/0x77 net/mptcp/protocol.c:2445 mptcp_worker+0x58a/0xa70 net/mptcp/protocol.c:2528 process_one_work+0x9df/0x16d0 kernel/workqueue.c:2307 worker_thread+0x95/0xe10 kernel/workqueue.c:2454 kthread+0x2f4/0x3b0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> ================================================================================ This change limits the maximum timeout by limiting the size of the shift, which keeps all intermediate values in-bounds.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03ae283bd71f761feae3f402668d698b393b0e79Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0c3f34beb459753f9f80d0cc14c1b50ab615c631Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/877d11f0332cd2160e19e3313e262754c321fa36Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.17
linux linux_kernel 5.17
linux linux_kernel 5.17
linux linux_kernel 5.17
linux linux_kernel 5.17
linux linux_kernel 5.17


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: Correctly set DATA_FIN timeout when number of retransmits is large\n\nSyzkaller with UBSAN uncovered a scenario where a large number of\nDATA_FIN retransmits caused a shift-out-of-bounds in the DATA_FIN\ntimeout calculation:\n\n================================================================================\nUBSAN: shift-out-of-bounds in net/mptcp/protocol.c:470:29\nshift exponent 32 is too large for 32-bit type \u0027unsigned int\u0027\nCPU: 1 PID: 13059 Comm: kworker/1:0 Not tainted 5.17.0-rc2-00630-g5fbf21c90c60 #1\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\nWorkqueue: events mptcp_worker\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n ubsan_epilogue+0xb/0x5a lib/ubsan.c:151\n __ubsan_handle_shift_out_of_bounds.cold+0xb2/0x20e lib/ubsan.c:330\n mptcp_set_datafin_timeout net/mptcp/protocol.c:470 [inline]\n __mptcp_retrans.cold+0x72/0x77 net/mptcp/protocol.c:2445\n mptcp_worker+0x58a/0xa70 net/mptcp/protocol.c:2528\n process_one_work+0x9df/0x16d0 kernel/workqueue.c:2307\n worker_thread+0x95/0xe10 kernel/workqueue.c:2454\n kthread+0x2f4/0x3b0 kernel/kthread.c:377\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n \u003c/TASK\u003e\n================================================================================\n\nThis change limits the maximum timeout by limiting the size of the\nshift, which keeps all intermediate values in-bounds."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mptcp: establece correctamente el tiempo de espera de DATA_FIN cuando el n\u00famero de retransmisiones es grande Syzkaller con UBSAN descubri\u00f3 un escenario en el que una gran cantidad de retransmisiones de DATA_FIN provocaban un desplazamiento fuera de los l\u00edmites en el tiempo de espera de DATA_FIN c\u00e1lculo: =================================================== ================================ UBSAN: desplazamiento fuera de los l\u00edmites en net/mptcp/protocol.c: El exponente de desplazamiento 470:29 32 es demasiado grande para el tipo \u0027unsigned int\u0027 de 32 bits CPU: 1 PID: 13059 Comm: kworker/1:0 Not tainted 5.17.0-rc2-00630-g5fbf21c90c60 #1 Nombre de hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 01/04/2014 Cola de trabajo: eventos mptcp_worker Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0xcd/0x134 lib/dump_stack .c:106 ubsan_epilogue+0xb/0x5a lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds.cold+0xb2/0x20e lib/ubsan.c:330 mptcp_set_datafin_timeout net/mptcp/protocol.c:470 __mptcp_retrans.cold+0x7 2/0x77 net/mptcp/protocol.c:2445 mptcp_worker+0x58a/0xa70 net/mptcp/protocol.c:2528 Process_one_work+0x9df/0x16d0 kernel/workqueue.c:2307 trabajador_thread+0x95/0xe10 kernel/workqueue.c:2454 kthread+0x2f4 /0x3b0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295  ====================== ==================================================== ========= Este cambio limita el tiempo de espera m\u00e1ximo al limitar el tama\u00f1o del turno, lo que mantiene todos los valores intermedios dentro de los l\u00edmites."
    }
  ],
  "id": "CVE-2022-48906",
  "lastModified": "2024-09-12T13:41:56.660",
  "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"
      }
    ]
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  "published": "2024-08-22T02:15:05.120",
  "references": [
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      "tags": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "NVD-CWE-noinfo"
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      "source": "nvd@nist.gov",
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}


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