Alpine: agetty, blkid, cfdisk, findmnt, hexdump, multiple libblkid packages, mcookie, multiple partx packages, runuser, setpriv, multiple umount packages, wipefs: security update to 2.37.2-r7 (deprecated)

medium Tenable Cloud Security Plugin ID 400004

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

- 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. (CVE-2021-3995)

- 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. (CVE-2021-3996)

Plugin Details

Severity: Medium

ID: 400004

Version: Revision 1.28

Type: Local

Family: Alpine Linux Local Security Checks

Published: 1/31/2022

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2021-3996

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/27/2022

Vulnerability Publication Date: 5/6/2022

Reference Information

CVE: CVE-2021-3995, CVE-2021-3996

Detections

Analytics