CVE-2021-47101

asix: fix uninit-value in asix_mdio_read()

Severity Score

6.0

*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:

asix: fix uninit-value in asix_mdio_read()

asix_read_cmd() may read less than sizeof(smsr) bytes and in this case
smsr will be uninitialized.

Fail log:
BUG: KMSAN: uninit-value in asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline]
BUG: KMSAN: uninit-value in asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] drivers/net/usb/asix_common.c:497
BUG: KMSAN: uninit-value in asix_mdio_read+0x3c1/0xb00 drivers/net/usb/asix_common.c:497 drivers/net/usb/asix_common.c:497
asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline]
asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] drivers/net/usb/asix_common.c:497
asix_mdio_read+0x3c1/0xb00 drivers/net/usb/asix_common.c:497 drivers/net/usb/asix_common.c:497

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: asix: corrige el valor uninit en asix_mdio_read() asix_read_cmd() puede leer menos que sizeof(smsr) bytes y en este caso smsr no estará inicializado. Registro de errores: ERROR: KMSAN: valor uninit en asix_check_host_enable drivers/net/usb/asix_common.c:82 [en línea] ERROR: KMSAN: valor uninit en asix_check_host_enable drivers/net/usb/asix_common.c:82 controladores [en línea] /net/usb/asix_common.c:497 ERROR: KMSAN: valor uninit en asix_mdio_read+0x3c1/0xb00 drivers/net/usb/asix_common.c:497 drivers/net/usb/asix_common.c:497 asix_check_host_enable drivers/net/ usb/asix_common.c:82 [en línea] controladores asix_check_host_enable/net/usb/asix_common.c:82 [en línea] controladores/net/usb/asix_common.c:497 controladores asix_mdio_read+0x3c1/0xb00/net/usb/asix_common.c :497 controladores/net/usb/asix_common.c:497

*Credits: N/A

CVSS Scores

Red Hatv3.1 6.0

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-29 CVE Reserved
2024-03-04 CVE Published
2024-03-05 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-457: Use of Uninitialized Variable

CAPEC

References (5)

URL	Tag	Source
https://git.kernel.org/stable/c/d9fe64e511144c1ee7d7555b4111f09dde9692ef	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/d259f621c85949f30cc578cac813b82bb5169f56	2021-12-29
https://git.kernel.org/stable/c/8035b1a2a37a29d8c717ef84fca8fe7278bc9f03	2021-12-22

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2021-47101	2024-09-24
https://bugzilla.redhat.com/show_bug.cgi?id=2267916	2024-09-24

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"				>= 4.9 < 5.15.12 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.15.12"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.9 < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.16"		en		Affected