vulnerability

FreeBSD: VID-31AD2F10-7711-11EB-B87A-901B0EF719AB (CVE-2020-25581): FreeBSD -- jail_remove(2) fails to kill all jailed processes

Severity
9
CVSS
(AV:N/AC:M/Au:S/C:C/I:C/A:C)
Published
Feb 24, 2021
Added
Feb 25, 2021
Modified
Apr 5, 2021

Description

Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.


From VID-31AD2F10-7711-11EB-B87A-901B0EF719AB:




Problem Description:


Due to a race condition in the jail_remove(2) implementation, it


may fail to kill some of the processes.


Impact:


A process running inside a jail can avoid being killed during jail


termination. If a jail is subsequently started with the same root


path, a lingering jailed process may be able to exploit the window


during which a devfs filesystem is mounted but the jail's devfs


ruleset has not been applied, to access device nodes which are


ordinarily inaccessible. If the process is privileged, it may be able


to escape the jail and gain full access to the system.



Solution(s)

freebsd-upgrade-base-11_4-release-p8freebsd-upgrade-base-12_2-release-p4
Title
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