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Ubuntu: USN-5279-1 (CVE-2021-3995): util-linux vulnerabilities

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Ubuntu: USN-5279-1 (CVE-2021-3995): util-linux vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
08/23/2022
Created
03/29/2023
Added
03/22/2023
Modified
03/22/2023

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.

Solution(s)

  • ubuntu-upgrade-mount
  • ubuntu-upgrade-util-linux

References

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