#VU60004 Permissions, Privileges, and Access Controls in Util-linux - CVE-2021-3995
Published: January 25, 2022
Vulnerability identifier: #VU60004
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-3995
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Util-linux
Util-linux
Software vendor:
kernel.org
kernel.org
Description
The vulnerability allows a local user to bypass implemented security restrictions.
The vulnerability exists due to improper parsing of the /proc/self/mountinfo file in libmount. A local user can unmount other user's filesystems that are either world-writable themselves or mounted in a world-writable directory.
Remediation
Install updates from vendor's website.