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

0.0
medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.04% (6th percentile)
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NVD
5.5 medium
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SUSE
5.5 medium
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Red Hat
5.5 medium

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  • Snyk ID SNYK-UBUNTU2004-UTILLINUX-2387723
  • published 29 Jan 2022
  • disclosed 23 Aug 2022
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Introduced: 29 Jan 2022

CVE-2021-3996 Open this link in a new tab
CWE-552 Open this link 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 a local user on a vulnerable system to unmount other users' filesystems that are either world-writable themselves (like /tmp) or mounted in a world-writable directory. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.