CVE-2021-47159

net: dsa: fix a crash if ->get_sset_count() fails

Severity Score

"-"

*CVSS v-

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:

net: dsa: fix a crash if ->get_sset_count() fails

If ds->ops->get_sset_count() fails then it "count" is a negative error
code such as -EOPNOTSUPP. Because "i" is an unsigned int, the negative
error code is type promoted to a very high value and the loop will
corrupt memory until the system crashes.

Fix this by checking for error codes and changing the type of "i" to
just int.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: corrige un bloqueo si ->get_sset_count() falla. Si ds->ops->get_sset_count() falla, entonces "count" es un código de error negativo como - EOPNOTSUPP. Debido a que "i" es un int sin signo, el código de error negativo se promociona a un valor muy alto y el bucle corromperá la memoria hasta que el sistema falle. Solucione este problema buscando códigos de error y cambiando el tipo de "i" a solo int.

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-03-25 CVE Reserved
2024-03-25 CVE Published
2024-03-26 EPSS Updated
2024-09-11 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (6)

URL	Tag	Source
https://git.kernel.org/stable/c/badf3ada60ab8f76f9488dc8f5c0c57f70682f5a	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/0f2cb08c57edefb0e7b5045e0e3e9980a3d3aa37	2021-06-03
https://git.kernel.org/stable/c/ce5355f140a7987011388c7e30c4f8fbe180d3e8	2021-06-03
https://git.kernel.org/stable/c/caff86f85512b8e0d9830e8b8b0dfe13c68ce5b6	2021-06-03
https://git.kernel.org/stable/c/7b22466648a4f8e3e94f57ca428d1531866d1373	2021-06-03
https://git.kernel.org/stable/c/a269333fa5c0c8e53c92b5a28a6076a28cde3e83	2021-05-10

URL	Date	SRC

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"				>= 4.7 < 4.19.193 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.19.193"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.4.124 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.4.124"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.10.42 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.10.42"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.12.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.12.9"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.7 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.13"		en		Affected