CVE-2020-14331

kernel: kernel: buffer over write in vgacon_scroll

Severity Score

6.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was found in the Linux kernel’s implementation of the invert video code on VGA consoles when a local attacker attempts to resize the console, calling an ioctl VT_RESIZE, which causes an out-of-bounds write to occur. This flaw allows a local user with access to the VGA console to crash the system, potentially escalating their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Se encontró un fallo en la implementación del kernel de Linux del código de video invertido en consolas VGA cuando un atacante local intenta cambiar el tamaño de la consola, llamando un ioctl VT_RESIZE, lo que causa una escritura fuera de límites. Este fallo permite a un usuario local con acceso a la consola VGA bloquear el sistema, escalando potencialmente sus privilegios en el sistema. La mayor amenaza de esta vulnerabilidad es la confidencialidad e integridad de los datos, así como la disponibilidad del sistema

*Credits: N/A

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

Low

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

2020-06-17 CVE Reserved
2020-09-15 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (7)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html	Mailing List

URL	Date	SRC
https://www.openwall.com/lists/oss-security/2020/07/28/2	2024-08-04

URL	Date	SRC
https://lists.openwall.net/linux-kernel/2020/07/29/234	2023-02-12

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1858679	2020-11-10
https://access.redhat.com/security/cve/CVE-2020-14331	2020-11-10

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"				<= 5.7.19 Search vendor "Linux" for product "Linux Kernel" and version " <= 5.7.19"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.8.0 Search vendor "Linux" for product "Linux Kernel" and version "5.8.0"		rc1		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.8.0 Search vendor "Linux" for product "Linux Kernel" and version "5.8.0"		rc2		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.8.0 Search vendor "Linux" for product "Linux Kernel" and version "5.8.0"		rc3		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.8.0 Search vendor "Linux" for product "Linux Kernel" and version "5.8.0"		rc4		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.8.0 Search vendor "Linux" for product "Linux Kernel" and version "5.8.0"		rc5		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.8.0 Search vendor "Linux" for product "Linux Kernel" and version "5.8.0"		rc6		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected