Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.5, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 2 products from midnightbsd, from freebsd organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-09-03T15:15:11.520

Last Modified

2024-11-21T05:16:08.933

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:N/I:N/A:C

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

6.9

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	midnightbsd	midnightbsd	< 1.2.7	Yes
Application	midnightbsd	midnightbsd	≤ 2020-08-19	Yes
Operating System	freebsd	freebsd	≤ 11.4	Yes

References

http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt Exploit, Vendor Advisory ([email protected])
https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c Exploit, Third Party Advisory ([email protected])
https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc Patch, Vendor Advisory ([email protected])
https://www.midnightbsd.org/notes/ Release Notes, Vendor Advisory ([email protected])
http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt Exploit, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.midnightbsd.org/notes/ Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For midnightbsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.