Vulnerability Details : 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.
Vulnerability category: Memory Corruption
Products affected by CVE-2020-24863
- cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
- cpe:2.3:a:midnightbsd:midnightbsd:*:*:*:*:*:*:*:*
- cpe:2.3:a:midnightbsd:midnightbsd:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-24863
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 36 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-24863
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2020-24863
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-24863
-
https://www.midnightbsd.org/notes/
MidnightBSD Release NotesRelease Notes;Vendor Advisory
-
http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt
Exploit;Vendor Advisory
-
https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c
src/vfs_syscalls.c at 1691c07ff4f27b97220a5d65e217341e477f4014 · MidnightBSD/src · GitHubExploit;Third Party Advisory
-
https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc
Patch;Vendor Advisory
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