vulnerability

Amazon Linux 2023: CVE-2021-3995: Medium priority package update for util-linux

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Severity
4
CVSS
(AV:L/AC:M/Au:S/C:N/I:N/A:C)
Published
Jan 24, 2022
Added
Feb 17, 2025
Modified
Jul 9, 2025

Description

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.

Solutions

amazon-linux-2023-upgrade-libblkidamazon-linux-2023-upgrade-libblkid-debuginfoamazon-linux-2023-upgrade-libblkid-develamazon-linux-2023-upgrade-libfdiskamazon-linux-2023-upgrade-libfdisk-debuginfoamazon-linux-2023-upgrade-libfdisk-develamazon-linux-2023-upgrade-libmountamazon-linux-2023-upgrade-libmount-debuginfoamazon-linux-2023-upgrade-libmount-develamazon-linux-2023-upgrade-libsmartcolsamazon-linux-2023-upgrade-libsmartcols-debuginfoamazon-linux-2023-upgrade-libsmartcols-develamazon-linux-2023-upgrade-libuuidamazon-linux-2023-upgrade-libuuid-debuginfoamazon-linux-2023-upgrade-libuuid-develamazon-linux-2023-upgrade-python3-libmountamazon-linux-2023-upgrade-python3-libmount-debuginfoamazon-linux-2023-upgrade-util-linuxamazon-linux-2023-upgrade-util-linux-coreamazon-linux-2023-upgrade-util-linux-core-debuginfoamazon-linux-2023-upgrade-util-linux-debuginfoamazon-linux-2023-upgrade-util-linux-debugsourceamazon-linux-2023-upgrade-util-linux-useramazon-linux-2023-upgrade-util-linux-user-debuginfoamazon-linux-2023-upgrade-uuiddamazon-linux-2023-upgrade-uuidd-debuginfo

References

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