Detections
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EulerOS Virtualization 2.9.1 : util-linux (EulerOS-SA-2022-1616)

medium Nessus Plugin ID 160587

Synopsis

The remote EulerOS Virtualization host is missing multiple security updates.

Description

According to the versions of the util-linux packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

 - 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)

 - 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)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected util-linux packages.

See Also

http://www.nessus.org/u?bfe8cf37

Plugin Details

Severity: Medium

ID: 160587

File Name: EulerOS_SA-2022-1616.nasl

Version: 1.5

Type: local

Published: 5/5/2022

Updated: 10/31/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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

CPE: p-cpe:/a:huawei:euleros:libblkid, p-cpe:/a:huawei:euleros:libfdisk, p-cpe:/a:huawei:euleros:libmount, p-cpe:/a:huawei:euleros:libsmartcols, p-cpe:/a:huawei:euleros:libuuid, p-cpe:/a:huawei:euleros:util-linux, p-cpe:/a:huawei:euleros:util-linux-user, cpe:/o:huawei:euleros:uvp:2.9.1

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/uvp_version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/5/2022

Vulnerability Publication Date: 5/5/2022

Reference Information

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