CVE-2020-12465

kernel: buffer overflow in mt76_add_fragment function in drivers/net/wireless/mediatek/mt76/dma.c

Severity Score

6.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An array overflow was discovered in mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c in the Linux kernel before 5.5.10, aka CID-b102f0c522cf. An oversized packet with too many rx fragments can corrupt memory of adjacent pages.

Se descubrió un desbordamiento de matriz en la función mt76_add_fragment en el archivo drivers/net/wireless/mediatek/mt76/dma.c en el kernel de Linux versiones anteriores a la versión 5.5.10, también se conoce como CID-b102f0c522cf. Un paquete de gran tamaño con muchos fragmentos rx puede corromper la memoria de páginas adyacentes.

A memory overflow and data corruption flaw were found in the Mediatek MT76 driver module for WiFi in mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c. An oversized packet with too many rx fragments causes an overflow and corruption in memory of adjacent pages. A local attacker with a special user or root privileges can cause a denial of service or a leak of internal kernel information.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-04-29 CVE Reserved
2020-04-29 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CAPEC

References (6)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20200608-0001	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b102f0c522cf668c8382c56a4f771b37d011cda2	2023-10-12
https://github.com/torvalds/linux/commit/b102f0c522cf668c8382c56a4f771b37d011cda2	2023-10-12

URL	Date	SRC
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.10	2023-10-12
https://access.redhat.com/security/cve/CVE-2020-12465	2020-11-04
https://bugzilla.redhat.com/show_bug.cgi?id=1831699	2020-11-04

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"				>= 4.16 < 4.19.111 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.16 < 4.19.111"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.20 < 5.4.26 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.20 < 5.4.26"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.5 < 5.5.10 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.5.10"		-		Affected
Netapp Search vendor "Netapp"		Active Iq Unified Manager Search vendor "Netapp" for product "Active Iq Unified Manager"				-		vmware_vsphere		Affected
Netapp Search vendor "Netapp"		Cloud Backup Search vendor "Netapp" for product "Cloud Backup"				-		-		Affected
Netapp Search vendor "Netapp"		Hci Baseboard Management Controller Search vendor "Netapp" for product "Hci Baseboard Management Controller"				h300s Search vendor "Netapp" for product "Hci Baseboard Management Controller" and version "h300s"		-		Affected
Netapp Search vendor "Netapp"		Hci Baseboard Management Controller Search vendor "Netapp" for product "Hci Baseboard Management Controller"				h410c Search vendor "Netapp" for product "Hci Baseboard Management Controller" and version "h410c"		-		Affected
Netapp Search vendor "Netapp"		Hci Baseboard Management Controller Search vendor "Netapp" for product "Hci Baseboard Management Controller"				h410s Search vendor "Netapp" for product "Hci Baseboard Management Controller" and version "h410s"		-		Affected
Netapp Search vendor "Netapp"		Hci Baseboard Management Controller Search vendor "Netapp" for product "Hci Baseboard Management Controller"				h500s Search vendor "Netapp" for product "Hci Baseboard Management Controller" and version "h500s"		-		Affected
Netapp Search vendor "Netapp"		Hci Baseboard Management Controller Search vendor "Netapp" for product "Hci Baseboard Management Controller"				h610c Search vendor "Netapp" for product "Hci Baseboard Management Controller" and version "h610c"		-		Affected
Netapp Search vendor "Netapp"		Hci Baseboard Management Controller Search vendor "Netapp" for product "Hci Baseboard Management Controller"				h610s Search vendor "Netapp" for product "Hci Baseboard Management Controller" and version "h610s"		-		Affected
Netapp Search vendor "Netapp"		Hci Baseboard Management Controller Search vendor "Netapp" for product "Hci Baseboard Management Controller"				h615c Search vendor "Netapp" for product "Hci Baseboard Management Controller" and version "h615c"		-		Affected
Netapp Search vendor "Netapp"		Hci Baseboard Management Controller Search vendor "Netapp" for product "Hci Baseboard Management Controller"				h700s Search vendor "Netapp" for product "Hci Baseboard Management Controller" and version "h700s"		-		Affected
Netapp Search vendor "Netapp"		Solidfire \& Hci Management Node Search vendor "Netapp" for product "Solidfire \& Hci Management Node"				-		-		Affected
Netapp Search vendor "Netapp"		Steelstore Cloud Integrated Storage Search vendor "Netapp" for product "Steelstore Cloud Integrated Storage"				-		-		Affected
Netapp Search vendor "Netapp"		Aff Baseboard Management Controller Search vendor "Netapp" for product "Aff Baseboard Management Controller"				a700s Search vendor "Netapp" for product "Aff Baseboard Management Controller" and version "a700s"		-		Affected
Netapp Search vendor "Netapp"		Hci Compute Node Search vendor "Netapp" for product "Hci Compute Node"				-		-		Affected
Netapp Search vendor "Netapp"		Solidfire Baseboard Management Controller Search vendor "Netapp" for product "Solidfire Baseboard Management Controller"				-		-		Affected