CVE-2020-24863

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, and FreeBSD through 11.4, that allows an attacker to trigger an invalid free and crash the system via a crafted size value in conjunction with an invalid mode.

Se encontró una vulnerabilidad de corrupción de memoria en la función del kernel kern_getfsstat en MidnightBSD versiones anteriores a 1.2.7 y versiones 1.3 hasta el19-08-2020, y FreeBSD versiones hasta 11.4, que permite a un atacante desencadenar una liberación no válida y bloquear el sistema por medio de un valor de tamaño diseñado en conjunto con un modo no válido

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-08-28 CVE Reserved
2020-09-03 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 (4)

URL	Tag	Source

URL	Date	SRC
http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt	2024-08-04
https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c	2024-08-04

URL	Date	SRC
https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc	2020-09-11

URL	Date	SRC
https://www.midnightbsd.org/notes	2020-09-11

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Midnightbsd Search vendor "Midnightbsd"		Midnightbsd Search vendor "Midnightbsd" for product "Midnightbsd"				< 1.2.7 Search vendor "Midnightbsd" for product "Midnightbsd" and version " < 1.2.7"		-		Affected
Midnightbsd Search vendor "Midnightbsd"		Midnightbsd Search vendor "Midnightbsd" for product "Midnightbsd"				>= 1.3 <= 2020-08-19 Search vendor "Midnightbsd" for product "Midnightbsd" and version " >= 1.3 <= 2020-08-19"		-		Affected
Freebsd Search vendor "Freebsd"		Freebsd Search vendor "Freebsd" for product "Freebsd"				<= 11.4 Search vendor "Freebsd" for product "Freebsd" and version " <= 11.4"		-		Affected