CVE - CVE-2021-3996

CVE-ID
CVE-2021-3996	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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 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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://security.netapp.com/advisory/ntap-20221209-0002/ FULLDISC:20221208 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328) URL:http://seclists.org/fulldisclosure/2022/Dec/4 GENTOO:GLSA-202401-08 URL:https://security.gentoo.org/glsa/202401-08 MISC:http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html MISC:https://access.redhat.com/security/cve/CVE-2021-3996 URL:https://access.redhat.com/security/cve/CVE-2021-3996 MISC:https://bugzilla.redhat.com/show_bug.cgi?id=2024628 URL:https://bugzilla.redhat.com/show_bug.cgi?id=2024628 MISC:https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb URL:https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb MISC:https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes URL: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 URL:https://www.openwall.com/lists/oss-security/2022/01/24/2 MLIST:[oss-security] 20221130 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328) URL:http://www.openwall.com/lists/oss-security/2022/11/30/2
Assigning CNA
Red Hat, Inc.
Date Record Created
20211122	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20211122)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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