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nvd-json-data-feeds/CVE-2022/CVE-2022-490xx/CVE-2022-49059.json
cad-safe-bot 6a206bf025 Auto-Update: 2025-03-09T03:00:19.873769+00:00
2025-03-09 03:03:50 +00:00

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{
"id": "CVE-2022-49059",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-02-26T07:00:43.150",
"lastModified": "2025-02-27T18:15:23.913",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: add flush_workqueue to prevent uaf\n\nOur detector found a concurrent use-after-free bug when detaching an\nNCI device. The main reason for this bug is the unexpected scheduling\nbetween the used delayed mechanism (timer and workqueue).\n\nThe race can be demonstrated below:\n\nThread-1 Thread-2\n | nci_dev_up()\n | nci_open_device()\n | __nci_request(nci_reset_req)\n | nci_send_cmd\n | queue_work(cmd_work)\nnci_unregister_device() |\n nci_close_device() | ...\n del_timer_sync(cmd_timer)[1] |\n... | Worker\nnci_free_device() | nci_cmd_work()\n kfree(ndev)[3] | mod_timer(cmd_timer)[2]\n\nIn short, the cleanup routine thought that the cmd_timer has already\nbeen detached by [1] but the mod_timer can re-attach the timer [2], even\nit is already released [3], resulting in UAF.\n\nThis UAF is easy to trigger, crash trace by POC is like below\n\n[ 66.703713] ==================================================================\n[ 66.703974] BUG: KASAN: use-after-free in enqueue_timer+0x448/0x490\n[ 66.703974] Write of size 8 at addr ffff888009fb7058 by task kworker/u4:1/33\n[ 66.703974]\n[ 66.703974] CPU: 1 PID: 33 Comm: kworker/u4:1 Not tainted 5.18.0-rc2 #5\n[ 66.703974] Workqueue: nfc2_nci_cmd_wq nci_cmd_work\n[ 66.703974] Call Trace:\n[ 66.703974] <TASK>\n[ 66.703974] dump_stack_lvl+0x57/0x7d\n[ 66.703974] print_report.cold+0x5e/0x5db\n[ 66.703974] ? enqueue_timer+0x448/0x490\n[ 66.703974] kasan_report+0xbe/0x1c0\n[ 66.703974] ? enqueue_timer+0x448/0x490\n[ 66.703974] enqueue_timer+0x448/0x490\n[ 66.703974] __mod_timer+0x5e6/0xb80\n[ 66.703974] ? mark_held_locks+0x9e/0xe0\n[ 66.703974] ? try_to_del_timer_sync+0xf0/0xf0\n[ 66.703974] ? lockdep_hardirqs_on_prepare+0x17b/0x410\n[ 66.703974] ? queue_work_on+0x61/0x80\n[ 66.703974] ? lockdep_hardirqs_on+0xbf/0x130\n[ 66.703974] process_one_work+0x8bb/0x1510\n[ 66.703974] ? lockdep_hardirqs_on_prepare+0x410/0x410\n[ 66.703974] ? pwq_dec_nr_in_flight+0x230/0x230\n[ 66.703974] ? rwlock_bug.part.0+0x90/0x90\n[ 66.703974] ? _raw_spin_lock_irq+0x41/0x50\n[ 66.703974] worker_thread+0x575/0x1190\n[ 66.703974] ? process_one_work+0x1510/0x1510\n[ 66.703974] kthread+0x2a0/0x340\n[ 66.703974] ? kthread_complete_and_exit+0x20/0x20\n[ 66.703974] ret_from_fork+0x22/0x30\n[ 66.703974] </TASK>\n[ 66.703974]\n[ 66.703974] Allocated by task 267:\n[ 66.703974] kasan_save_stack+0x1e/0x40\n[ 66.703974] __kasan_kmalloc+0x81/0xa0\n[ 66.703974] nci_allocate_device+0xd3/0x390\n[ 66.703974] nfcmrvl_nci_register_dev+0x183/0x2c0\n[ 66.703974] nfcmrvl_nci_uart_open+0xf2/0x1dd\n[ 66.703974] nci_uart_tty_ioctl+0x2c3/0x4a0\n[ 66.703974] tty_ioctl+0x764/0x1310\n[ 66.703974] __x64_sys_ioctl+0x122/0x190\n[ 66.703974] do_syscall_64+0x3b/0x90\n[ 66.703974] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 66.703974]\n[ 66.703974] Freed by task 406:\n[ 66.703974] kasan_save_stack+0x1e/0x40\n[ 66.703974] kasan_set_track+0x21/0x30\n[ 66.703974] kasan_set_free_info+0x20/0x30\n[ 66.703974] __kasan_slab_free+0x108/0x170\n[ 66.703974] kfree+0xb0/0x330\n[ 66.703974] nfcmrvl_nci_unregister_dev+0x90/0xd0\n[ 66.703974] nci_uart_tty_close+0xdf/0x180\n[ 66.703974] tty_ldisc_kill+0x73/0x110\n[ 66.703974] tty_ldisc_hangup+0x281/0x5b0\n[ 66.703974] __tty_hangup.part.0+0x431/0x890\n[ 66.703974] tty_release+0x3a8/0xc80\n[ 66.703974] __fput+0x1f0/0x8c0\n[ 66.703974] task_work_run+0xc9/0x170\n[ 66.703974] exit_to_user_mode_prepare+0x194/0x1a0\n[ 66.703974] syscall_exit_to_user_mode+0x19/0x50\n[ 66.703974] do_syscall_64+0x48/0x90\n[ 66.703974] entry_SYSCALL_64_after_hwframe+0x44/0x\n---truncated---"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfc: nci: agregar flush_workqueue para evitar uaf Nuestro detector encontr\u00f3 un error de uso simult\u00e1neo despu\u00e9s de la liberaci\u00f3n al desconectar un dispositivo NCI. La raz\u00f3n principal de este error es la programaci\u00f3n inesperada entre el mecanismo de retraso utilizado (temporizador y cola de trabajo). La ejecuci\u00f3n se puede demostrar a continuaci\u00f3n: Hilo-1 Hilo-2 | nci_dev_up() | nci_open_device() | __nci_request(nci_reset_req) | nci_send_cmd | queue_work(cmd_work) nci_unregister_device() | nci_close_device() | ... del_timer_sync(cmd_timer)[1] | ... | Trabajador nci_free_device() | nci_cmd_work() kfree(ndev)[3] | mod_timer(cmd_timer)[2] En resumen, la rutina de limpieza pens\u00f3 que el cmd_timer ya hab\u00eda sido separado por [1] pero el mod_timer puede volver a unir el temporizador [2], incluso si ya est\u00e1 liberado [3], lo que da como resultado UAF. Este UAF es f\u00e1cil de activar, el seguimiento de fallas por POC es como el siguiente [66.703713] ======================================================================= [66.703974] ERROR: KASAN: use-after-free en enqueue_timer+0x448/0x490 [66.703974] Escritura de tama\u00f1o 8 en la direcci\u00f3n ffff888009fb7058 por la tarea kworker/u4:1/33 [66.703974] [66.703974] CPU: 1 PID: 33 Comm: kworker/u4:1 No contaminado 5.18.0-rc2 #5 [ 66.703974] Cola de trabajo: nfc2_nci_cmd_wq nci_cmd_work [ 66.703974] Rastreo de llamadas: [ 66.703974] [ 66.703974] dump_stack_lvl+0x57/0x7d [ 66.703974] print_report.cold+0x5e/0x5db [ 66.703974] ? enqueue_timer+0x448/0x490 [ 66.703974] kasan_report+0xbe/0x1c0 [ 66.703974] ? enqueue_timer+0x448/0x490 [ 66.703974] enqueue_timer+0x448/0x490 [ 66.703974] __mod_timer+0x5e6/0xb80 [ 66.703974] ? mark_held_locks+0x9e/0xe0 [ 66.703974] ? try_to_del_timer_sync+0xf0/0xf0 [ 66.703974] ? lockdep_hardirqs_on_prepare+0x17b/0x410 [ 66.703974] ? queue_work_on+0x61/0x80 [ 66.703974] ? lockdep_hardirqs_on+0xbf/0x130 [ 66.703974] process_one_work+0x8bb/0x1510 [ 66.703974] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 66.703974] ? pwq_dec_nr_in_flight+0x230/0x230 [ 66.703974] ? rwlock_bug.part.0+0x90/0x90 [ 66.703974] ? _raw_spin_lock_irq+0x41/0x50 [ 66.703974] worker_thread+0x575/0x1190 [ 66.703974] ? process_one_work+0x1510/0x1510 [ 66.703974] kthread+0x2a0/0x340 [ 66.703974] ? kthread_complete_and_exit+0x20/0x20 [ 66.703974] ret_from_fork+0x22/0x30 [ 66.703974] [ 66.703974] [ 66.703974] Asignado por la tarea 267: [ 66.703974] kasan_save_stack+0x1e/0x40 [ 66.703974] __kasan_kmalloc+0x81/0xa0 [ 66.703974] nci_allocate_device+0xd3/0x390 [ 66.703974] nfcmrvl_nci_register_dev+0x183/0x2c0 [ 66.703974] Liberado por la tarea 406: [ 66.703974] kasan_save_stack+0x1e/0x40 [ 66.703974] kasan_set_track+0x21/0x30 [ 66.703974] kasan_set_free_info+0x20/0x30 [ 66.703974] __kasan_slab_free+0x108/0x170 [ 66.703974] kfree+0xb0/0x330 [ 66.703974] nfcmrvl_nci_unregister_dev+0x90/0xd0 [ 66.703974] nci_uart_tty_close+0xdf/0x180 [ 66.703974] tty_ldisc_kill+0x73/0x110 [ 66.703974] tty_ldisc_hangup+0x281/0x5b0 [ 66.703974] __tty_hangup.part.0+0x431/0x890 [ 66.703974] tty_release+0x3a8/0xc80 [ 66.703974] __fput+0x1f0/0x8c0 [ 66.703974] task_work_run+0xc9/0x170 [ 66.703974] exit_to_user_mode_prepare+0x194/0x1a0 [ 66.703974] syscall_exit_to_user_mode+0x19/0x50 [ 66.703974] do_syscall_64+0x48/0x90 [ 66.703974] entry_SYSCALL_64_after_hwframe+0x44/0x ---truncado---"
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
]
},
"weaknesses": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/1a1748d0dd0f0a98535c6baeef671c8722107639",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5c63ad2b0a267a524c12c88acb1ba9c2d109a801",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/67677050cecbe0edfdd81cd508415e9636ba7c65",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7d3232214ca4ea8f7d18df264c3b254aa8089d7f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9d243aff5f7e6b04e907c617426bbdf26e996ac8",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9ded5ae40f4fe37fcc28f36d76bf45df20be5432",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/edd4600120641e1714e30112e69a548cfb68e067",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ef27324e2cb7bb24542d6cb2571740eefe6b00dc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}
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