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CVE-2021-3995

CVE-2021-3995

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 5.5 · Medium · EPSS 0.6% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • util-linux

    Versions
    • Fixed in util-linux v2.37.3: Affected

    No fix published

  • util-linux Debian:12

    Affected ranges
    • ECOSYSTEM: < 2.37.3-1

    Update to 2.37.3-1

  • util-linux Debian:13

    Affected ranges
    • ECOSYSTEM: < 2.37.3-1

    Update to 2.37.3-1

  • util-linux Debian:14

    Affected ranges
    • ECOSYSTEM: < 2.37.3-1

    Update to 2.37.3-1

  • util-linux Ubuntu:20.04:LTS

    Versions
    • 2.34-0.1ubuntu2
    • 2.34-0.1ubuntu4
    • 2.34-0.1ubuntu5
    • 2.34-0.1ubuntu6
    • 2.34-0.1ubuntu7
    • 2.34-0.1ubuntu8
    • 2.34-0.1ubuntu9
    • 2.34-0.1ubuntu9.1
    Affected ranges
    • ECOSYSTEM: < 2.34-0.1ubuntu9.3

    Update to 2.34-0.1ubuntu9.3

  • util-linux Ubuntu:22.04:LTS

    Versions
    • 2.36.1-8ubuntu1
    • 2.37.2-4ubuntu1
    Affected ranges
    • ECOSYSTEM: < 2.37.2-4ubuntu2

    Update to 2.37.2-4ubuntu2

Original sources

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