CVE-2021-3996

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html Third Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/11/30/2 Mailing List Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3996 Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2024628 Issue Tracking Patch Third Party Advisory
https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb Patch Third Party Advisory
https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes Release Notes Vendor Advisory
https://security.gentoo.org/glsa/202401-08
https://security.netapp.com/advisory/ntap-20221209-0002/ Broken Link Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/01/24/2 Exploit Mailing List Patch Third Party Advisory
http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html Third Party Advisory
http://seclists.org/fulldisclosure/2022/Dec/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/11/30/2 Mailing List Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3996 Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2024628 Issue Tracking Patch Third Party Advisory
https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb Patch Third Party Advisory
https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes Release Notes Vendor Advisory
https://security.gentoo.org/glsa/202401-08
https://security.netapp.com/advisory/ntap-20221209-0002/ Broken Link Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/01/24/2 Exploit Mailing List Patch Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
History

21 Nov 2024, 06:23

Type Values Removed Values Added
References () http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html - Third Party Advisory () http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html - Third Party Advisory
References () http://seclists.org/fulldisclosure/2022/Dec/4 - Mailing List, Third Party Advisory () http://seclists.org/fulldisclosure/2022/Dec/4 - Mailing List, Third Party Advisory
References () http://www.openwall.com/lists/oss-security/2022/11/30/2 - Mailing List, Third Party Advisory () http://www.openwall.com/lists/oss-security/2022/11/30/2 - Mailing List, Third Party Advisory
References () https://access.redhat.com/security/cve/CVE-2021-3996 - Issue Tracking, Third Party Advisory () https://access.redhat.com/security/cve/CVE-2021-3996 - Issue Tracking, Third Party Advisory
References () https://bugzilla.redhat.com/show_bug.cgi?id=2024628 - Issue Tracking, Patch, Third Party Advisory () https://bugzilla.redhat.com/show_bug.cgi?id=2024628 - Issue Tracking, Patch, Third Party Advisory
References () https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb - Patch, Third Party Advisory () https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb - Patch, Third Party Advisory
References () https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes - Release Notes, Vendor Advisory () https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes - Release Notes, Vendor Advisory
References () https://security.gentoo.org/glsa/202401-08 - () https://security.gentoo.org/glsa/202401-08 -
References () https://security.netapp.com/advisory/ntap-20221209-0002/ - Broken Link, Third Party Advisory () https://security.netapp.com/advisory/ntap-20221209-0002/ - Broken Link, Third Party Advisory
References () https://www.openwall.com/lists/oss-security/2022/01/24/2 - Exploit, Mailing List, Patch, Third Party Advisory () https://www.openwall.com/lists/oss-security/2022/01/24/2 - Exploit, Mailing List, Patch, Third Party Advisory

01 Dec 2022, 01:15

Type Values Removed Values Added
CWE CWE-552
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*
References
  • (MLIST) http://www.openwall.com/lists/oss-security/2022/11/30/2 -
References (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=2024628 - (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=2024628 - Issue Tracking, Patch, Third Party Advisory
References (MISC) https://access.redhat.com/security/cve/CVE-2021-3996 - (MISC) https://access.redhat.com/security/cve/CVE-2021-3996 - Issue Tracking, Third Party Advisory
References (MISC) https://www.openwall.com/lists/oss-security/2022/01/24/2 - (MISC) https://www.openwall.com/lists/oss-security/2022/01/24/2 - Exploit, Mailing List, Patch, Third Party Advisory
References (MISC) https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb - (MISC) https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb - Patch, Third Party Advisory
References (MISC) https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes - (MISC) https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes - Release Notes, Vendor Advisory

23 Aug 2022, 20:15

Type Values Removed Values Added
New CVE
Information

Published : 2022-08-23 20:15

Updated : 2024-11-21 06:23

NVD link : CVE-2021-3996

Mitre link : CVE-2021-3996

CVE.ORG link : CVE-2021-3996

JSON object : View

Products Affected

fedoraproject

  • fedora

kernel

  • util-linux
CWE
CWE-552

Files or Directories Accessible to External Parties