Detections
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GLSA-202105-25 : OpenVPN: Authentication bypass

high Nessus Plugin ID 157011

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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-202105-25 (OpenVPN: Authentication bypass)

 It was discovered that OpenVPN incorrectly handled deferred authentication.
 Impact :

 A remote attacker could bypass authentication and access control channel data and trigger further information leaks.
 Workaround :

 Configure OpenVPN server to not use deferred authentication.

Solution

All OpenVPN users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=net-vpn/openvpn-2.5.2'

See Also

https://security.gentoo.org/glsa/202105-25

Plugin Details

Severity: High

ID: 157011

File Name: gentoo_GLSA-202105-25.nasl

Version: 1.4

Type: local

Published: 1/24/2022

Updated: 12/21/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-15078

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:openvpn, 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: 5/26/2021

Vulnerability Publication Date: 4/26/2021

Reference Information

CVE: CVE-2020-15078

GLSA: 202105-25