EulerOS 2.0 SP8 : chrony (EulerOS-SA-2020-2509)

medium Nessus Plugin ID 144118
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote EulerOS host is missing a security update.

Description

According to the version of the chrony package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

- A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder.
The file is created during chronyd startup while still running as the root user, and when it's opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.(CVE-2020-14367)

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 chrony package.

See Also

http://www.nessus.org/u?6b7b3c8a

Plugin Details

Severity: Medium

ID: 144118

File Name: EulerOS_SA-2020-2509.nasl

Version: 1.3

Type: local

Published: 12/14/2020

Updated: 1/6/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.7

Vector: AV:L/AC:L/Au:N/C:N/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 6

Temporal Score: 5.2

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:chrony, cpe:/o:huawei:euleros:2.0

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

Excluded KB Items: Host/EulerOS/uvp_version

Exploit Ease: No known exploits are available

Patch Publication Date: 12/14/2020

Reference Information

CVE: CVE-2020-14367