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CVE-2020-24863

Date: September 3, 2020

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.

Language: C

Severity Score

Related Resources (6)

https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc
http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt
https://nvd.nist.gov/vuln/detail/CVE-2020-24863
https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c
https://www.midnightbsd.org/notes/
https://www.mend.io/vulnerability-database/CVE-2020-24863

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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