CVE-2022-0547

2022-03-1818:15:12

Debian Security Bug Tracker

security-tracker.debian.org

openvpn

authentication

bypass

vulnerability

external user

credentials

unix

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.008

Percentile

81.4%

JSON

OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.

OSVersionArchitecturePackageVersionFilename
Debian12allopenvpn< 2.5.6-1openvpn_2.5.6-1_all.deb
Debian11allopenvpn<= 2.5.1-3openvpn_2.5.1-3_all.deb
Debian999allopenvpn< 2.5.6-1openvpn_2.5.6-1_all.deb
Debian13allopenvpn< 2.5.6-1openvpn_2.5.6-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	openvpn	< 2.5.6-1	openvpn_2.5.6-1_all.deb
Debian	11	all	openvpn	<= 2.5.1-3	openvpn_2.5.1-3_all.deb
Debian	999	all	openvpn	< 2.5.6-1	openvpn_2.5.6-1_all.deb
Debian	13	all	openvpn	< 2.5.6-1	openvpn_2.5.6-1_all.deb