[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Thu, 9 Jun 2022 10:49:22 +0800 (GMT+08:00)
From: duoming@....edu.cn
To: oss-security@...ts.openwall.com
Cc: solar@...nwall.com
Subject: Re: Linux kernel: UAF, null-ptr-deref and double-free
vulnerabilities in nfcmrvl module
Hello,
The cve-2022-1734 was assigned to this problem.
> Hello there,
>
> There are double-free, use-after-free(write,read), null-ptr-deref vulnerabilities
> in drivers/nfc/nfcmrvl of linux that allow attacker to crash linux kernel by simulating
> nfc device from user-space.
>
> =*=*=*=*=*=*=*=*= Bug Details =*=*=*=*=*=*=*=*=
>
> There are destructive operations such as nfcmrvl_fw_dnld_abort and
> gpio_free in nfcmrvl_nci_unregister_dev. The resources such as firmware,
> gpio and so on could be destructed while the upper layer functions such as
> nfcmrvl_fw_dnld_start and nfcmrvl_nci_recv_frame is executing, which leads
> to double-free, use-after-free and null-ptr-deref bugs.
>
> There are three situations that could lead to double-free bugs.
>
> The first situation is shown below:
>
> (Thread 1) | (Thread 2)
> nfcmrvl_fw_dnld_start |
> ... | nfcmrvl_nci_unregister_dev
> release_firmware() | nfcmrvl_fw_dnld_abort
> kfree(fw) //(1) | fw_dnld_over
> | release_firmware
> ... | kfree(fw) //(2)
> | ...
>
> The second situation is shown below:
>
> (Thread 1) | (Thread 2)
> nfcmrvl_fw_dnld_start |
> ... |
> mod_timer |
> (wait a time) |
> fw_dnld_timeout | nfcmrvl_nci_unregister_dev
> fw_dnld_over | nfcmrvl_fw_dnld_abort
> release_firmware | fw_dnld_over
> kfree(fw) //(1) | release_firmware
> ... | kfree(fw) //(2)
>
> The third situation is shown below:
>
> (Thread 1) | (Thread 2)
> nfcmrvl_nci_recv_frame |
> if(..->fw_download_in_progress)|
> nfcmrvl_fw_dnld_recv_frame |
> queue_work |
> |
> fw_dnld_rx_work | nfcmrvl_nci_unregister_dev
> fw_dnld_over | nfcmrvl_fw_dnld_abort
> release_firmware | fw_dnld_over
> kfree(fw) //(1) | release_firmware
> | kfree(fw) //(2)
>
> The firmware struct is deallocated in position (1) and deallocated
> in position (2) again.
>
> What's more, there are also use-after-free and null-ptr-deref bugs
> in nfcmrvl_fw_dnld_start.
>
> One of the use-after-free bugs about firmware is shown below:
>
> (Use Thread) | (Free Thread )
> nfcmrvl_fw_dnld_start |
> | nfcmrvl_nci_unregister_dev
> | nfcmrvl_fw_dnld_abort
> ... | fw_dnld_over
> | release_firmware
> | kfree(fw) //(1)
> priv->fw_dnld.fw->data;//(2)| ...
>
> One of the use-after-free bugs about gpio is shown below:
>
> (Use Thread) | (Free Thread )
> nfcmrvl_fw_dnld_start |
> | nfcmrvl_nci_unregister_dev
> ... | ...
> | gpio_free //(1)
> nfcmrvl_chip_reset | ...
> gpio_set_value //(2) |
>
> One of the null-ptr-deref bugs about firmware is shown below:
>
> (Use Thread) | (Free Thread )
> nfcmrvl_fw_dnld_start |
> | nfcmrvl_nci_unregister_dev
> | nfcmrvl_fw_dnld_abort
> ... | fw_dnld_over
> | priv->fw_dnld.fw = NULL;//(1)
> |
> priv->fw_dnld.fw->data;//(2)| ...
>
> If we deallocate firmware struct, gpio or set null to the members of priv->fw_dnld
> in position(1), then, we dereference firmware, gpio or the members of priv->fw_dnld
> in position(2), the UAF or NPD bugs will happen.
>
> =*=*=*=*=*=*=*=*= Bug Effects =*=*=*=*=*=*=*=*=
>
> We can successfully trigger the vulnerabilities to crash the linux kernel.
>
> (1) One of the backtraces caused by use-after-free(write) bug is shown below.
>
> [ 138.280382] BUG: KASAN: use-after-free in _request_firmware+0x52/0x690
> [ 138.280382] Write of size 8 at addr ffff88800c114850 by task download/11174
> [ 138.280382] Call Trace:
> [ 138.280382] <TASK>
> [ 138.280382] dump_stack_lvl+0x57/0x7d
> [ 138.280382] print_report.cold+0x5e/0x5db
> [ 138.280382] ? _request_firmware+0x52/0x690
> [ 138.280382] kasan_report+0xbe/0x1c0
> [ 138.280382] ? _request_firmware+0x52/0x690
> [ 138.280382] _request_firmware+0x52/0x690
> [ 138.280382] request_firmware+0x2d/0x50
> [ 138.280382] nfcmrvl_fw_dnld_start+0x7a/0xb0
> [ 138.280382] nfc_fw_download+0x92/0xe0
> [ 138.280382] nfc_genl_fw_download+0x10b/0x170
> [ 138.280382] ? nfc_genl_enable_se+0xa0/0xa0
> [ 138.280382] ? __kasan_slab_alloc+0x2c/0x80
> [ 138.280382] ? __nla_parse+0x22/0x30
> [ 138.280382] ? genl_family_rcv_msg_attrs_parse.constprop.0+0xd3/0x130
> [ 138.280382] genl_family_rcv_msg_doit+0x17a/0x200
> [ 138.280382] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x130/0x130
> [ 138.280382] ? mutex_lock_io_nested+0xb63/0xbd0
> [ 138.280382] ? security_capable+0x48/0x60
> [ 138.280382] genl_rcv_msg+0x18d/0x2c0
> [ 138.280382] ? genl_get_cmd+0x1b0/0x1b0
> [ 138.280382] ? rcu_read_lock_sched_held+0xd/0x70
> [ 138.280382] ? nfc_genl_enable_se+0xa0/0xa0
> [ 138.280382] ? rcu_read_lock_sched_held+0xd/0x70
> [ 138.280382] ? lock_acquire+0xce/0x410
> [ 138.280382] netlink_rcv_skb+0xc4/0x1f0
> [ 138.280382] ? genl_get_cmd+0x1b0/0x1b0
> [ 138.280382] ? netlink_ack+0x4d0/0x4d0
> [ 138.280382] ? netlink_deliver_tap+0xf7/0x5a0
> [ 138.280382] genl_rcv+0x1f/0x30
> [ 138.280382] netlink_unicast+0x2d8/0x420
> [ 138.280382] ? netlink_attachskb+0x430/0x430
> [ 138.280382] netlink_sendmsg+0x3a9/0x6e0
> [ 138.280382] ? netlink_unicast+0x420/0x420
> [ 138.280382] ? netlink_unicast+0x420/0x420
> [ 138.280382] sock_sendmsg+0x91/0xa0
> [ 138.280382] __sys_sendto+0x168/0x200
> [ 138.280382] ? __ia32_sys_getpeername+0x40/0x40
> [ 138.280382] ? preempt_count_sub+0xf/0xb0
> [ 138.280382] ? fd_install+0xfb/0x340
> [ 138.280382] ? __sys_socket+0xf0/0x160
> [ 138.280382] ? __x64_sys_clock_nanosleep+0x195/0x220
> [ 138.280382] ? compat_sock_ioctl+0x410/0x410
> [ 138.280382] __x64_sys_sendto+0x6f/0x80
> [ 138.280382] do_syscall_64+0x3b/0x90
> [ 138.280382] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 138.280382] RIP: 0033:0x7ff12ac0602c
> [ 138.280382] Code: 0a f8 ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 2b
> [ 138.280382] RSP: 002b:00007ff12aa1ee00 EFLAGS: 00000293 ORIG_RAX: 0000000000c
> [ 138.280382] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff12ac0602c
> [ 138.280382] RDX: 000000000000002c RSI: 000055eab88030b0 RDI: 0000000000000000
> [ 138.280382] RBP: 0000000000000000 R08: 00007ff12aa1ee7c R09: 000000000000000c
> [ 138.280382] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffca74ba00e
> [ 138.280382] R13: 00007ffca74ba00f R14: 00007ff12aa1efc0 R15: 00007ff12aa1f700
>
> (2) One of the backtraces caused by use-after-free(read) bug is shown below.
>
> [ 65.835462] BUG: KASAN: use-after-free in nci_fw_download+0x26/0x60
> [ 65.840236] Read of size 8 at addr ffff88800c2f5008 by task download/160
> [ 65.845755] Call Trace:
> [ 65.845755] <TASK>
> [ 65.845755] dump_stack_lvl+0x57/0x7d
> [ 65.845755] print_report.cold+0x5e/0x5db
> [ 65.845755] ? nci_fw_download+0x26/0x60
> [ 65.845755] kasan_report+0xbe/0x1c0
> [ 65.856061] ? nfc_driver_failure+0x90/0xa0
> [ 65.856235] ? nci_fw_download+0x26/0x60
> [ 65.856235] nci_fw_download+0x26/0x60
> [ 65.856235] nfc_fw_download+0x99/0xe0
> [ 65.856235] nfc_genl_fw_download+0x10b/0x170
> [ 65.861189] ? nfc_genl_enable_se+0xa0/0xa0
> [ 65.861189] ? __kasan_slab_alloc+0x2c/0x80
> [ 65.861189] ? __nla_parse+0x22/0x30
> [ 65.865988] ? genl_family_rcv_msg_attrs_parse.constprop.0+0xd3/0x130
> [ 65.865988] genl_family_rcv_msg_doit+0x17a/0x200
> [ 65.865988] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x130/0x130
> [ 65.870892] ? asm_spurious_interrupt+0x3/0x30
> [ 65.870892] ? security_capable+0x48/0x60
> [ 65.870892] genl_rcv_msg+0x18d/0x2c0
> [ 65.870892] ? genl_get_cmd+0x1b0/0x1b0
> [ 65.870892] ? rcu_read_lock_sched_held+0xd/0x70
> [ 65.875946] ? nfc_genl_enable_se+0xa0/0xa0
> [ 65.875946] ? rcu_read_lock_sched_held+0xd/0x70
> [ 65.875946] ? lock_acquire+0xce/0x410
> [ 65.875946] netlink_rcv_skb+0xc4/0x1f0
> [ 65.880842] ? genl_get_cmd+0x1b0/0x1b0
> [ 65.881778] ? netlink_ack+0x4d0/0x4d0
> [ 65.881778] ? netlink_deliver_tap+0xf7/0x5a0
> [ 65.881778] genl_rcv+0x1f/0x30
> [ 65.881778] netlink_unicast+0x2d8/0x420
> [ 65.885734] ? netlink_attachskb+0x430/0x430
> [ 65.887472] netlink_sendmsg+0x3a9/0x6e0
> [ 65.887472] ? netlink_unicast+0x420/0x420
> [ 65.887472] ? netlink_unicast+0x420/0x420
> [ 65.887472] sock_sendmsg+0x91/0xa0
> [ 65.891949] __sys_sendto+0x168/0x200
> [ 65.893134] ? __ia32_sys_getpeername+0x40/0x40
> [ 65.893134] ? lockdep_hardirqs_on_prepare+0xe/0x220
> [ 65.893134] ? __schedule+0x5c5/0x1180
> [ 65.893134] ? io_schedule_timeout+0xb0/0xb0
> [ 65.897936] ? clockevents_program_event+0xd3/0x130
> [ 65.897936] ? hrtimer_interrupt+0x332/0x350
> [ 65.897936] __x64_sys_sendto+0x6f/0x80
> [ 65.897936] do_syscall_64+0x3b/0x90
> [ 65.897936] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 65.902930] RIP: 0033:0x7f96173ec02c
> [ 65.902930] Code: 0a f8 ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 fb
> [ 65.908959] RSP: 002b:00007f9617204df0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
> [ 65.908959] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96173ec02c
> [ 65.908959] RDX: 0000000000000034 RSI: 0000556fa2a030b0 RDI: 0000000000000003
> [ 65.908959] RBP: 0000000000000000 R08: 00007f9617204e6c R09: 000000000000000c
> [ 65.915542] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffde78477ee
> [ 65.916990] R13: 00007ffde78477ef R14: 00007f9617204fc0 R15: 00007f9617205700
>
> (3) One of the backtraces caused by double-free bug is shown below.
>
> [ 122.640457] BUG: KASAN: double-free or invalid-free in fw_dnld_over+0x28/0xf0
> [ 122.640457] Call Trace:
> [ 122.640457] <TASK>
> [ 122.640457] dump_stack_lvl+0x57/0x7d
> [ 122.640457] print_report.cold+0x5e/0x5db
> [ 122.640457] ? fw_dnld_over+0x28/0xf0
> [ 122.640457] ? fw_dnld_over+0x28/0xf0
> [ 1re22.640457] kasan_report_invalid_free+0x90/0x180
> [ 122.640457] ? refcount_warn_saturate+0x40/0x110
> [ 122.640457] ? fw_dnld_over+0x28/0xf0
> [ 122.640457] __kasan_slab_free+0x152/0x170
> [ 122.640457] ? fw_dnld_over+0x28/0xf0
> [ 122.640457] kfree+0xb0/0x330
> [ 122.640457] fw_dnld_over+0x28/0xf0
> [ 122.640457] nfcmrvl_nci_unregister_dev+0x61/0x70
> [ 122.640457] nci_uart_tty_close+0x87/0xd0
> [ 122.640457] tty_ldisc_kill+0x3e/0x80
> [ 122.640457] tty_ldisc_hangup+0x1b2/0x2c0
> [ 122.640457] __tty_hangup.part.0+0x316/0x520
> [ 122.640457] tty_release+0x200/0x670
> [ 122.640457] __fput+0x110/0x410
> [ 122.640457] ? _raw_spin_unlock_irq+0x1f/0x40
> [ 122.640457] task_work_run+0x86/0xd0
> [ 122.640457] exit_to_user_mode_prepare+0x1aa/0x1b0
> [ 122.640457] syscall_exit_to_user_mode+0x19/0x50
> [ 122.640457] do_syscall_64+0x48/0x90
> [ 122.640457] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 122.640457] RIP: 0033:0x7f68433f6beb
> [ 122.640457] Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 84
> [ 122.640457] RSP: 002b:00007f684320fee0 EFLAGS: 00000293 ORIG_RAX: 00000000003
> [ 122.640457] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f68433f6beb
> [ 122.640457] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
> [ 122.640457] RBP: 00007f684320ff00 R08: 0000000000000000 R09: 00007f6843210700
> [ 122.640457] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffd5d6f9fde
> [ 122.640457] R13: 00007ffd5d6f9fdf R14: 00007f684320ffc0 R15: 00007f6843210700
>
> (4) One of the backtraces caused by null-ptr-deref bug is shown below.
>
> [ 80.495478] BUG: KASAN: null-ptr-deref in nfcmrvl_fw_dnld_start.cold+0x19/0x276
> [ 80.498745] Read of size 8 at addr 0000000000000008 by task download/161
> [ 80.502308] Call Trace:
> [ 80.502308] <TASK>
> [ 80.502308] dump_stack_lvl+0x57/0x7d
> [ 80.502308] kasan_report+0xbe/0x1c0
> [ 80.502308] ? nfcmrvl_fw_dnld_start.cold+0x19/0x276
> [ 80.502308] nfcmrvl_fw_dnld_start.cold+0x19/0x276
> [ 80.508210] ? nfc_fw_download+0x79/0xe0
> [ 80.508210] nfc_fw_download+0x99/0xe0
> [ 80.508210] nfc_genl_fw_download+0x10b/0x170
> [ 80.508210] ? nfc_genl_enable_se+0xa0/0xa0
> [ 80.508210] ? __kasan_slab_alloc+0x2c/0x80
> [ 80.508210] ? __nla_parse+0x22/0x30
> [ 80.508210] ? genl_family_rcv_msg_attrs_parse.constprop.0+0xd3/0x130
> [ 80.508210] genl_family_rcv_msg_doit+0x17a/0x200
> [ 80.508210] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x130/0x130
> [ 80.513085] ? mutex_lock_io_nested+0xb43/0xbd0
> [ 80.513085] ? security_capable+0x48/0x60
> [ 80.513085] genl_rcv_msg+0x18d/0x2c0
> [ 80.513085] ? genl_get_cmd+0x1b0/0x1b0
> [ 80.513085] ? rcu_read_lock_sched_held+0xd/0x70
> [ 80.513085] ? nfc_genl_enable_se+0xa0/0xa0
> [ 80.513085] ? rcu_read_lock_sched_held+0xd/0x70
> [ 80.513085] ? lock_acquire+0xce/0x410
> [ 80.513085] netlink_rcv_skb+0xc4/0x1f0
> [ 80.513085] ? genl_get_cmd+0x1b0/0x1b0
> [ 80.518420] ? netlink_ack+0x4d0/0x4d0
> [ 80.518420] ? netlink_deliver_tap+0xf7/0x5a0
> [ 80.518420] genl_rcv+0x1f/0x30
> [ 80.518420] netlink_unicast+0x2d8/0x420
> [ 80.518420] ? netlink_attachskb+0x430/0x430
> [ 80.518420] netlink_sendmsg+0x3a9/0x6e0
> [ 80.518420] ? netlink_unicast+0x420/0x420
> [ 80.518420] ? netlink_unicast+0x420/0x420
> [ 80.518420] sock_sendmsg+0x91/0xa0
> [ 80.518420] __sys_sendto+0x168/0x200
> [ 80.523005] ? __ia32_sys_getpeername+0x40/0x40
> [ 80.523005] ? preempt_count_sub+0xf/0xb0
> [ 80.523005] ? fd_install+0xfb/0x340
> [ 80.523005] ? __sys_socket+0xf0/0x160
> [ 80.523005] ? compat_sock_ioctl+0x410/0x410
> [ 80.523005] __x64_sys_sendto+0x6f/0x80
> [ 80.523005] do_syscall_64+0x3b/0x90
> [ 80.523005] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 80.523005] RIP: 0033:0x7f30f54f402c
> [ 80.523005] Code: 0a f8 ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2b
> [ 80.528021] RSP: 002b:00007f30f530cdf0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
> [ 80.528021] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f30f54f402c
> [ 80.528021] RDX: 0000000000000034 RSI: 00005571766030b0 RDI: 0000000000000005
> [ 80.533650] RBP: 0000000000000000 R08: 00007f30f530ce6c R09: 000000000000000c
> [ 80.533650] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffd9c6c6cee
> [ 80.533650] R13: 00007ffd9c6c6cef R14: 00007f30f530cfc0 R15: 00007f30f530d700
>
> =*=*=*=*=*=*=*=*= Bug Fix =*=*=*=*=*=*=*=*=
>
> The patch that have been applied to mainline Linux kernel is shown below.
> https://github.com/torvalds/linux/commit/d270453a0d9ec10bb8a802a142fb1b3601a83098
>
> =*=*=*=*=*=*=*=*= Timeline =*=*=*=*=*=*=*=*=
>
> 2022-05-01: commit d270453a0d9e accepted to mainline kernel
> 2022-06-05: send an email to secalert@...hat.com in order to request CVE number
>
> =*=*=*=*=*=*=*=*= Credit =*=*=*=*=*=*=*=*=
>
> Duoming Zhou <duoming@....edu.cn>
Best Regards,
Duoming Zhou
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
