CVE-2020-24863

MEDIUM

MidnightBSD < 1.2.7 and 1.3-2020-08-19 - Out-of-bounds Write via kern_getfsstat Size Value

Title source: llm

Description

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.

References (4)

Core 4

Core References

Release Notes, Vendor Advisory x_refsource_misc

https://www.midnightbsd.org/notes/

Exploit, Third Party Advisory x_refsource_misc

https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c

View Exploit ZIP pw:eip

Exploit, Vendor Advisory x_refsource_confirm

http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt

Patch, Vendor Advisory x_refsource_confirm

https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc

Scores

CVSS v3 5.5

EPSS 0.0053

EPSS Percentile 41.0%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-787

Status published

Products (2)

freebsd/freebsd < 11.4

midnightbsd/midnightbsd < 1.2.7

Published Sep 03, 2020

Tracked Since Feb 18, 2026