Vulnerability Monitor

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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.

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)