GLSA-202008-23 : chrony: Symlink vulnerability

medium Nessus Plugin ID 140071
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 Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-202008-23 (chrony: Symlink vulnerability)

It was found that chrony did not check whether its PID file was a symlink.
Impact :

A local attacker could perform symlink attack(s) to overwrite arbitrary files with root privileges.
Workaround :

There is no known workaround at this time.

Solution

All chrony users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/chrony-3.5.1'

See Also

http://www.nessus.org/u?274f0ff2

https://security.gentoo.org/glsa/202008-23

Plugin Details

Severity: Medium

ID: 140071

File Name: gentoo_GLSA-202008-23.nasl

Version: 1.3

Type: local

Published: 8/31/2020

Updated: 9/8/2020

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:gentoo:linux:chrony, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Ease: No known exploits are available

Patch Publication Date: 8/30/2020

Vulnerability Publication Date: 8/24/2020

Reference Information

CVE: CVE-2020-14367

GLSA: 202008-23