CVE-2023-52477

usb: hub: Guard against accesses to uninitialized BOS descriptors

Severity Score

4.4

*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:

usb: hub: Guard against accesses to uninitialized BOS descriptors

Many functions in drivers/usb/core/hub.c and drivers/usb/core/hub.h
access fields inside udev->bos without checking if it was allocated and
initialized. If usb_get_bos_descriptor() fails for whatever
reason, udev->bos will be NULL and those accesses will result in a
crash:

BUG: kernel NULL pointer dereference, address: 0000000000000018
PGD 0 P4D 0
Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 5 PID: 17818 Comm: kworker/5:1 Tainted: G W 5.15.108-18910-gab0e1cb584e1 #1 <HASH:1f9e 1>
Hardware name: Google Kindred/Kindred, BIOS Google_Kindred.12672.413.0 02/03/2021
Workqueue: usb_hub_wq hub_event
RIP: 0010:hub_port_reset+0x193/0x788
Code: 89 f7 e8 20 f7 15 00 48 8b 43 08 80 b8 96 03 00 00 03 75 36 0f b7 88 92 03 00 00 81 f9 10 03 00 00 72 27 48 8b 80 a8 03 00 00 <48> 83 78 18 00 74 19 48 89 df 48 8b 75 b0 ba 02 00 00 00 4c 89 e9
RSP: 0018:ffffab740c53fcf8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffa1bc5f678000 RCX: 0000000000000310
RDX: fffffffffffffdff RSI: 0000000000000286 RDI: ffffa1be9655b840
RBP: ffffab740c53fd70 R08: 00001b7d5edaa20c R09: ffffffffb005e060
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffffab740c53fd3e R14: 0000000000000032 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffffa1be96540000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000018 CR3: 000000022e80c005 CR4: 00000000003706e0
Call Trace:
hub_event+0x73f/0x156e
? hub_activate+0x5b7/0x68f
process_one_work+0x1a2/0x487
worker_thread+0x11a/0x288
kthread+0x13a/0x152
? process_one_work+0x487/0x487
? kthread_associate_blkcg+0x70/0x70
ret_from_fork+0x1f/0x30

Fall back to a default behavior if the BOS descriptor isn't accessible
and skip all the functionalities that depend on it: LPM support checks,
Super Speed capabilitiy checks, U1/U2 states setup.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: hub: protege contra accesos a descriptores BOS no inicializados Muchas funciones en drivers/usb/core/hub.c y drivers/usb/core/hub.h acceden a los campos dentro de udev- >bos sin verificar si fue asignado e inicializado. Si usb_get_bos_descriptor() falla por cualquier motivo, udev->bos será NULL y esos accesos resultarán en un bloqueo: ERROR: desreferencia del puntero NULL del kernel, dirección: 0000000000000018 PGD 0 P4D 0 Vaya: 0000 [#1] CPU PREEMPT SMP NOPTI : 5 PID: 17818 Comm: kworker/5:1 Tainted: GW 5.15.108-18910-gab0e1cb584e1 #1 Nombre de hardware: Google Kindred/Kindred, BIOS Google_Kindred.12672.413.0 03/02/2021 Cola de trabajo : usb_hub_wq hub_event RIP: 0010:hub_port_reset+0x193/0x788 Código: 89 f7 e8 20 f7 15 00 48 8b 43 08 80 b8 96 03 00 00 03 75 36 0f b7 88 92 03 00 00 81 f9 10 03 00 00 72 27 48 8b 80 a8 03 00 00 <48> 83 78 18 00 74 19 48 89 df 48 8b 75 b0 ba 02 00 00 00 4c 89 e9 RSP: 0018:ffffab740c53fcf8 EFLAGS: 00010246 RAX: 000000 0000000000 RBX: ffffa1bc5f678000 RCX: 0000000000000310 RDX: ffffffffffffdff RSI: 0000000000000286 RDI: ffffa1be9655b840 RBP: ffffab740c53fd70 R08: 00001b7d5edaa20c R09: ffffffffb005e060 R10: 0000000000000001 R11: 00000000 00000000 R12: 0000000000000000 R13: ffffab740c53fd3e R14: 0000000000000032 R15: 00000000000000000 FS: 0000000000000000(0000) GS:ffffa1be965 40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000018 CR3: 000000022e80c005 CR4: 00000000003706e0 Seguimiento de llamadas: hub_event+0x73f/0x156e ? hub_activate+0x5b7/0x68f proceso_one_work+0x1a2/0x487 trabajador_thread+0x11a/0x288 kthread+0x13a/0x152 ? proceso_one_work+0x487/0x487? kthread_associate_blkcg+0x70/0x70 ret_from_fork+0x1f/0x30 Vuelva a un comportamiento predeterminado si no se puede acceder al descriptor BOS y omita todas las funcionalidades que dependen de él: comprobaciones de compatibilidad con LPM, comprobaciones de capacidad de supervelocidad, configuración de estados U1/U2.

*Credits: N/A

CVSS Scores

Red Hatv3.1 4.4

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

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

2024-02-20 CVE Reserved
2024-02-29 CVE Published
2024-02-29 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (10)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/c64e4dca9aefd232b17ac4c779b608b286654e81	2023-10-25
https://git.kernel.org/stable/c/8e7346bfea56453e31b7421c1c17ca2fb9ed613d	2023-10-25
https://git.kernel.org/stable/c/6ad3e9fd3632106696692232bf7ff88b9f7e1bc3	2023-10-25
https://git.kernel.org/stable/c/241f230324337ed5eae3846a554fb6d15169872c	2023-10-25
https://git.kernel.org/stable/c/528f0ba9f7a4bc1b61c9b6eb591ff97ca37cac6b	2023-10-19
https://git.kernel.org/stable/c/fb9895ab9533534335fa83d70344b397ac862c81	2023-10-19
https://git.kernel.org/stable/c/136f69a04e71ba3458d137aec3bb2ce1232c0289	2023-10-19
https://git.kernel.org/stable/c/f74a7afc224acd5e922c7a2e52244d891bbe44ee	2023-10-02

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-52477	2024-06-05
https://bugzilla.redhat.com/show_bug.cgi?id=2267038	2024-06-05

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"				< 4.14.328 Search vendor "Linux" for product "Linux Kernel" and version " < 4.14.328"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.19.297 Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.297"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.4.259 Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.259"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.10.199 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.199"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.15.136 Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.136"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.1.59 Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.59"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.5.8 Search vendor "Linux" for product "Linux Kernel" and version " < 6.5.8"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.6 Search vendor "Linux" for product "Linux Kernel" and version " < 6.6"		en		Affected