CVE-2020-24863

MEDIUM EPSS 40.9%
Published Sep 3, 20205y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 3, 2020 5y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
40.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 3

VendorProductVersionRange
midnightbsdmidnightbsd* <1.2.7
midnightbsdmidnightbsd*≥1.3  –  ≤2020-08-19
freebsdfreebsd* ≤11.4

References 4

  • midnightbsd.org http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt
    ExploitVendor Advisory
  • github.com https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c
    ExploitThird Party Advisory
  • freebsd.org https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc
    PatchVendor Advisory
  • midnightbsd.org https://www.midnightbsd.org/notes/
    Release NotesVendor Advisory

Remediation

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