Medium severity · published Sep 3, 2020
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…
5.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Freebsd · Freebsd
through 11.4 · source: NVD
MI
Midnightbsd · Midnightbsd
before 1.2.7; 1.3 through 2020-08-19 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-24863
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-24863
Exploit
http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt
Exploit
https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c
Patch
https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc
Release Notes
https://www.midnightbsd.org/notes/
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