CVE-2021-3995
- State
- Published
- Severity
- Not scored
- Published
- Aug 23, 2022
- Updated
- Aug 3, 2024
- Reserved
- Nov 22, 2021
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.
Scores
The record has no CVSS score.
Weaknesses
- CWE-552 Files or Directories Accessible to External Parties
Affected Products
| Product | Versions |
|---|---|
util-linuxn/a |
|
References
- https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes
- https://www.openwall.com/lists/oss-security/2022/01/24/2
- https://github.com/util-linux/util-linux/commit/57202f5713afa2af20ffbb6ab5331481d0396f8d
- https://bugzilla.redhat.com/show_bug.cgi?id=2024631https://access.redhat.com/security/cve/CVE-2021-3995
- [oss-security] 20221130 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328)mailing-list
- 20221208 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328)mailing-list
- http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html
- https://security.netapp.com/advisory/ntap-20221209-0002/
- GLSA-202401-08vendor-advisory
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