Files or Directories Accessible to External Parties Affecting util-linux package, versions <2.34-0.1ubuntu9.3


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-UBUNTU2004-UTILLINUX-2387728
  • published29 Jan 2022
  • disclosed23 Aug 2022

Introduced: 29 Jan 2022

CVE-2021-3995  (opens in a new tab)
CWE-552  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 util-linux to version 2.34-0.1ubuntu9.3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream util-linux package and not the util-linux package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows an unprivileged local attacker to unmount FUSE filesystems that belong to certain other users who have a UID that is a prefix of the UID of the attacker in its string form. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.

CVSS Scores

version 3.1