MEDIUM 5.5 Microsoft
CVE-2021-3996
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.
Microsoft Security Update 2022-Aug: 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.
Affected Products
- cm1 util-linux 2.32.1-7 on CBL Mariner 1.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-3996
- https://nvd.nist.gov/vuln/detail/CVE-2021-3996
This medium severity vulnerability with a CVSS score of 5.5 was published on 2022-08-09 via Microsoft. Affected: cm1 util-linux 2.32.1-7 on CBL Mariner 1.0.
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