CVE-2020-24863

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 28%
VendorProductVersion
midnightbsdmidnightbsd
𝑥
< 1.2.7
midnightbsdmidnightbsd
1.3 ≤
𝑥
≤ 2020-08-19
freebsdfreebsd
𝑥
≤ 11.4
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt
https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c
https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc
https://www.midnightbsd.org/notes/
http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt
https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c
https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc
https://www.midnightbsd.org/notes/