CVE-2021-3995

Name
CVE-2021-3995
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://bugzilla.redhat.com/show_bug.cgi?id=2024631https://access.redhat.com/security/cve/CVE-2021-3995
MISC https://github.com/util-linux/util-linux/commit/57202f5713afa2af20ffbb6ab5331481d0396f8d
MISC https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes
MISC https://www.openwall.com/lists/oss-security/2022/01/24/2
Third Party Advisory http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html
Mailing List http://seclists.org/fulldisclosure/2022/Dec/4
Mailing List http://www.openwall.com/lists/oss-security/2022/11/30/2
secalert@redhat.com https://security.gentoo.org/glsa/202401-08
Third Party Advisory https://security.netapp.com/advisory/ntap-20221209-0002/

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:* util-linux >= None < 2.37.3
cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:* util-linux >= 2.34 < 2.37.3

Vulnerable and fixed packages

Source package Branch Version Maintainer Status