CVE-2021-47284

isdn: mISDN: netjet: Fix crash in nj_probe:

Severity Score

4.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved:

isdn: mISDN: netjet: Fix crash in nj_probe:

'nj_setup' in netjet.c might fail with -EIO and in this case
'card->irq' is initialized and is bigger than zero. A subsequent call to
'nj_release' will free the irq that has not been requested.

Fix this bug by deleting the previous assignment to 'card->irq' and just
keep the assignment before 'request_irq'.

The KASAN's log reveals it:

[ 3.354615 ] WARNING: CPU: 0 PID: 1 at kernel/irq/manage.c:1826
free_irq+0x100/0x480
[ 3.355112 ] Modules linked in:
[ 3.355310 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
5.13.0-rc1-00144-g25a1298726e #13
[ 3.355816 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
[ 3.356552 ] RIP: 0010:free_irq+0x100/0x480
[ 3.356820 ] Code: 6e 08 74 6f 4d 89 f4 e8 5e ac 09 00 4d 8b 74 24 18
4d 85 f6 75 e3 e8 4f ac 09 00 8b 75 c8 48 c7 c7 78 c1 2e 85 e8 e0 cf f5
ff <0f> 0b 48 8b 75 c0 4c 89 ff e8 72 33 0b 03 48 8b 43 40 4c 8b a0 80
[ 3.358012 ] RSP: 0000:ffffc90000017b48 EFLAGS: 00010082
[ 3.358357 ] RAX: 0000000000000000 RBX: ffff888104dc8000 RCX:
0000000000000000
[ 3.358814 ] RDX: ffff8881003c8000 RSI: ffffffff8124a9e6 RDI:
00000000ffffffff
[ 3.359272 ] RBP: ffffc90000017b88 R08: 0000000000000000 R09:
0000000000000000
[ 3.359732 ] R10: ffffc900000179f0 R11: 0000000000001d04 R12:
0000000000000000
[ 3.360195 ] R13: ffff888107dc6000 R14: ffff888107dc6928 R15:
ffff888104dc80a8
[ 3.360652 ] FS: 0000000000000000(0000) GS:ffff88817bc00000(0000)
knlGS:0000000000000000
[ 3.361170 ] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3.361538 ] CR2: 0000000000000000 CR3: 000000000582e000 CR4:
00000000000006f0
[ 3.362003 ] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 3.362175 ] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 3.362175 ] Call Trace:
[ 3.362175 ] nj_release+0x51/0x1e0
[ 3.362175 ] nj_probe+0x450/0x950
[ 3.362175 ] ? pci_device_remove+0x110/0x110
[ 3.362175 ] local_pci_probe+0x45/0xa0
[ 3.362175 ] pci_device_probe+0x12b/0x1d0
[ 3.362175 ] really_probe+0x2a9/0x610
[ 3.362175 ] driver_probe_device+0x90/0x1d0
[ 3.362175 ] ? mutex_lock_nested+0x1b/0x20
[ 3.362175 ] device_driver_attach+0x68/0x70
[ 3.362175 ] __driver_attach+0x124/0x1b0
[ 3.362175 ] ? device_driver_attach+0x70/0x70
[ 3.362175 ] bus_for_each_dev+0xbb/0x110
[ 3.362175 ] ? rdinit_setup+0x45/0x45
[ 3.362175 ] driver_attach+0x27/0x30
[ 3.362175 ] bus_add_driver+0x1eb/0x2a0
[ 3.362175 ] driver_register+0xa9/0x180
[ 3.362175 ] __pci_register_driver+0x82/0x90
[ 3.362175 ] ? w6692_init+0x38/0x38
[ 3.362175 ] nj_init+0x36/0x38
[ 3.362175 ] do_one_initcall+0x7f/0x3d0
[ 3.362175 ] ? rdinit_setup+0x45/0x45
[ 3.362175 ] ? rcu_read_lock_sched_held+0x4f/0x80
[ 3.362175 ] kernel_init_freeable+0x2aa/0x301
[ 3.362175 ] ? rest_init+0x2c0/0x2c0
[ 3.362175 ] kernel_init+0x18/0x190
[ 3.362175 ] ? rest_init+0x2c0/0x2c0
[ 3.362175 ] ? rest_init+0x2c0/0x2c0
[ 3.362175 ] ret_from_fork+0x1f/0x30
[ 3.362175 ] Kernel panic - not syncing: panic_on_warn set ...
[ 3.362175 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
5.13.0-rc1-00144-g25a1298726e #13
[ 3.362175 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
[ 3.362175 ] Call Trace:
[ 3.362175 ] dump_stack+0xba/0xf5
[ 3.362175 ] ? free_irq+0x100/0x480
[ 3.362175 ] panic+0x15a/0x3f2
[ 3.362175 ] ? __warn+0xf2/0x150
[ 3.362175 ] ? free_irq+0x100/0x480
[ 3.362175 ] __warn+0x108/0x150
[ 3.362175 ] ? free_irq+0x100/0x480
[ 3.362175 ] report_bug+0x119/0x1c0
[ 3.362175 ] handle_bug+0x3b/0x80
[ 3.362175 ] exc_invalid_op+0x18/0x70
[ 3.362175 ] asm_exc_invalid_op+0x12/0x20
[ 3.362175 ] RIP: 0010:free_irq+0x100
---truncated---

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: isdn: mISDN: netjet: Soluciona fallo en nj_probe: 'nj_setup' en netjet.c puede fallar con -EIO y en este caso 'card->irq' está inicializado y es más grande que cero. Una llamada posterior a 'nj_release' liberará el irq que no ha sido solicitado. Corrija este error eliminando la asignación anterior a 'card->irq' y simplemente mantenga la asignación antes de 'request_irq'. El registro de KASAN lo revela: [3.354615] ADVERTENCIA: CPU: 0 PID: 1 en kernel/irq/manage.c:1826 free_irq+0x100/0x480 [3.355112] Módulos vinculados en: [3.355310] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.13.0-rc1-00144-g25a1298726e #13 [ 3.355816 ] Nombre del hardware: PC estándar QEMU (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04 /01/2014 [ 3.356552 ] RIP: 0010:free_irq+0x100/0x480 [ 3.356820 ] Código: 6e 08 74 6f 4d 89 f4 e8 5e ac 09 00 4d 8b 74 24 18 4d 85 f6 75 e3 e8 f ac 09 00 8b 75 c8 48 c7 c7 78 c1 2e 85 e8 e0 cf f5 ff <0f> 0b 48 8b 75 c0 4c 89 ff e8 72 33 0b 03 48 8b 43 40 4c 8b a0 80 [ 3.358012 ] RSP: 17b48 EFLAGS: 00010082 [ 3.358357 ] RAX: 0000000000000000 RBX: ffff888104dc8000 RCX: 0000000000000000 [ 3.358814 ] RDX: ffff8881003c8000 RSI: ffffffff8124a9e6 RDI: 00000000ffffff ff [ 3.359272 ] RBP: ffffc90000017b88 R08: 0000000000000000 R09: 0000000000000000 [ 3.359732 ] R10: ffffc900000179f0 R11: 0000000000001d0 4 R12: 0000000000000000 [ 3.360195 ] R13 : ffff888107dc6000 R14: ffff888107dc6928 R15: ffff888104dc80a8 [ 3.360652 ] FS: 0000000000000000(0000) GS:ffff88817bc00000(0000) 00000000000 [ 3.361170 ] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.361538 ] CR2: 00000000000000000 CR3: 000000000582e000 CR4: 00000000000006f0 [ 3.362003 ] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 3.362175 ] DR3: 000000000000000 0 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 3.362175 ] Seguimiento de llamadas: [ 3.362175 ] nj_release+0x51/0x1e0 [ 3.362175 ] nj_probe+0x450/0x950 [ 3,362175 ] ? pci_device_remove+0x110/0x110 [ 3.362175 ] local_pci_probe+0x45/0xa0 [ 3.362175 ] pci_device_probe+0x12b/0x1d0 [ 3.362175 ] really_probe+0x2a9/0x610 [ 3.362175 ]driver_probe_device+0x90/0x1d0 [3.362175]? mutex_lock_nested+0x1b/0x20 [3.362175] device_driver_attach+0x68/0x70 [3.362175] __driver_attach+0x124/0x1b0 [3.362175]? device_driver_attach+0x70/0x70 [3.362175] bus_for_each_dev+0xbb/0x110 [3.362175]? rdinit_setup+0x45/0x45 [ 3.362175 ] driver_attach+0x27/0x30 [ 3.362175 ] bus_add_driver+0x1eb/0x2a0 [ 3.362175 ] driver_register+0xa9/0x180 [ 3.362175 ] x82/0x90 [3.362175]? w6692_init+0x38/0x38 [3.362175] nj_init+0x36/0x38 [3.362175] do_one_initcall+0x7f/0x3d0 [3.362175]? rdinit_setup+0x45/0x45 [3.362175]? rcu_read_lock_sched_held+0x4f/0x80 [3.362175] kernel_init_freeable+0x2aa/0x301 [3.362175]? rest_init+0x2c0/0x2c0 [3.362175] kernel_init+0x18/0x190 [3.362175]? rest_init+0x2c0/0x2c0 [3.362175]? rest_init+0x2c0/0x2c0 [3.362175] ret_from_fork+0x1f/0x30 [3.362175] Pánico del kernel - no sincronizado: panic_on_warn establecido... [3.362175] CPU: 0 PID: 1 Comm: swapper/0 No contaminado 5.13.0-rc1-00144 -g25a1298726e #13 [ 3.362175 ] Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 01/04/2014 [ 3.362175 ] Seguimiento de llamadas: [ 3.362175 ] dump_stack+0xba/0xf5 [3.362175]? free_irq+0x100/0x480 [3.362175] pánico+0x15a/0x3f2 [3.362175]? __advertir+0xf2/0x150 [3.362175]? free_irq+0x100/0x480 [3.362175] __warn+0x108/0x150 [3.362175]? free_irq+0x100/0x480 [ 3.362175 ] report_bug+0x119/0x1c0 [ 3.362175 ] handle_bug+0x3b/0x80 [ 3.362175 ] exc_invalid_op+0x18/0x70 [ 3.362175 ] x12/0x20 [3.362175] RIP: 0010:free_irq+0x100 --- truncado---

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-05-21 CVE Reserved
2024-05-21 CVE Published
2024-05-22 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-590: Free of Memory not on the Heap

CAPEC

References (10)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/958cb1078ca60d214826fd90a0961a447fade59a	2021-06-16
https://git.kernel.org/stable/c/4c1fcb6ec964b44edbf84235134582a5ffae1521	2021-06-16
https://git.kernel.org/stable/c/a0a37e4454ca1c0b424edc2c9c2487c2c46a1be6	2021-06-16
https://git.kernel.org/stable/c/bf78e25bd3f487208e042c67c8a31706c2dba265	2021-06-16
https://git.kernel.org/stable/c/9d7d4649dc1c53acf76df260fd519db698ed20d7	2021-06-16
https://git.kernel.org/stable/c/143fc7220961220eecc04669e5909af8847bf8c8	2021-06-16
https://git.kernel.org/stable/c/6249193e03709ea625e10706ecaf17fea0427d3d	2021-06-16
https://git.kernel.org/stable/c/9f6f852550d0e1b7735651228116ae9d300f69b3	2021-05-17

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2021-47284	2024-08-08
https://bugzilla.redhat.com/show_bug.cgi?id=2282923	2024-08-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.4.273 Search vendor "Linux" for product "Linux Kernel" and version " < 4.4.273"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.9.273 Search vendor "Linux" for product "Linux Kernel" and version " < 4.9.273"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.14.237 Search vendor "Linux" for product "Linux Kernel" and version " < 4.14.237"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.19.195 Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.195"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.4.126 Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.126"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.10.44 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.44"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.12.11 Search vendor "Linux" for product "Linux Kernel" and version " < 5.12.11"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.13 Search vendor "Linux" for product "Linux Kernel" and version " < 5.13"		en		Affected