CVE-2024-36896

USB: core: Fix access violation during port device removal

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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

USB: core: Fix access violation during port device removal

Testing with KASAN and syzkaller revealed a bug in port.c:disable_store():
usb_hub_to_struct_hub() can return NULL if the hub that the port belongs to
is concurrently removed, but the function does not check for this
possibility before dereferencing the returned value.

It turns out that the first dereference is unnecessary, since hub->intfdev
is the parent of the port device, so it can be changed easily. Adding a
check for hub == NULL prevents further problems.

The same bug exists in the disable_show() routine, and it can be fixed the
same way.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: USB: core: corrige la infracción de acceso durante la eliminación del dispositivo del puerto. Las pruebas con KASAN y syzkaller revelaron un error en port.c:disable_store(): usb_hub_to_struct_hub() puede devolver NULL si el hub que el puerto al que pertenece se elimina simultáneamente, pero la función no comprueba esta posibilidad antes de desreferenciar el valor devuelto. Resulta que la primera desreferencia es innecesaria, ya que hub->intfdev es el padre del dispositivo portuario, por lo que se puede cambiar fácilmente. Agregar una verificación para hub == NULL evita más problemas. El mismo error existe en la rutina enable_show() y se puede solucionar de la misma manera.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

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:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-05-30 CVE Reserved
2024-05-30 CVE Published
2024-05-31 EPSS Updated
2024-12-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-170: Improper Null Termination
CWE-476: NULL Pointer Dereference

CAPEC

References (7)

URL	Tag	Source
https://git.kernel.org/stable/c/f061f43d7418cb62b8d073e221ec75d3f5b89e17	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/5f1d68ef5ddac27c6b997adccd1c339cef1e6848	2024-05-17
https://git.kernel.org/stable/c/63533549ff53d24daf47c443dbd43c308afc3434	2024-05-17
https://git.kernel.org/stable/c/6119ef6517ce501fc548154691abdaf1f954a277	2024-05-17
https://git.kernel.org/stable/c/a4b46d450c49f32e9d4247b421e58083fde304ce	2024-04-23

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2024-36896	2024-11-12
https://bugzilla.redhat.com/show_bug.cgi?id=2284556	2024-11-12

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"				>= 6.0 < 6.1.91 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.1.91"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.0 < 6.6.31 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.6.31"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.0 < 6.8.10 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.8.10"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.0 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.9"		en		Affected