cve-2022-48906
Vulnerability from cvelistv5
Published
2024-08-22 01:30
Modified
2024-12-19 08:10
Severity ?
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 Version: 6477dd39e62c3a67cfa368ddc127410b4ae424c6
Version: 6477dd39e62c3a67cfa368ddc127410b4ae424c6
Version: 6477dd39e62c3a67cfa368ddc127410b4ae424c6
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   Linux Linux Version: 5.13
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                "id": "CVE-2022-48906",
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                "timestamp": "2024-09-10T15:34:17.194266Z",
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    "assignerShortName": "Linux",
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    "datePublished": "2024-08-22T01:30:40.850Z",
    "dateReserved": "2024-08-21T06:06:23.292Z",
    "dateUpdated": "2024-12-19T08:10:14.711Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
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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 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    }
  }
}


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