Race condition in FreeBSD - CVE-2020-25584
Published: April 7, 2021
Vulnerability identifier: #VU51949
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-25584
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: FreeBSD Foundation
Affected software:
FreeBSD
FreeBSD
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition between lookup of ".." and remounting a filesystem. A local administrator can change the root directory outside of the jail and gain full read and write access to all files and directories in the system.
How to mitigate CVE-2020-25584
Install updates from vendor's website.