vulnerability
FreeBSD: VID-BBA850FD-770E-11EB-B87A-901B0EF719AB (CVE-2020-25582): FreeBSD -- jail_attach(2) relies on the caller to change the cwd
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:L/Au:S/C:C/I:C/A:N) | 2021-02-24 | 2021-02-25 | 2021-04-05 |
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-BBA850FD-770E-11EB-B87A-901B0EF719AB:
Problem Description:
When a process, such as jexec(8) or killall(1), calls jail_attach(2)
to enter a jail, the jailed root can attach to it using ptrace(2) before
the current working directory is changed.
Impact:
A process with superuser privileges running inside a jail could change
the root directory outside of the jail, thereby gaining full read and
writing access to all files and directories in the system.
Solution(s)
References
Explore Exposure Command
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