vulnerability
FreeBSD: VID-a7b97d26-9792-11eb-b87a-901b0ef719ab (CVE-2020-25584): FreeBSD -- jail escape possible by mounting over jail root
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:H/Au:N/C:C/I:C/A:C) | Apr 7, 2021 | Nov 4, 2022 | Dec 10, 2025 |
Severity
6
CVSS
(AV:L/AC:H/Au:N/C:C/I:C/A:C)
Published
Apr 7, 2021
Added
Nov 4, 2022
Modified
Dec 10, 2025
Description
Problem Description: Due to a race condition between lookup of ".." and remounting a filesystem, a process running inside a jail might access filesystem hierarchy outside of jail. Impact: A process with superuser privileges running inside a jail configured with the allow.mount permission (not enabled by default) could change the root directory outside of the jail, and thus gain full read and write access to all files and directories in the system.
Solutions
freebsd-upgrade-base-12_2-release-p6freebsd-upgrade-base-11_4-release-p9
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