Vulnerability Name:

CVE-2022-0547 (CCN-222201)

Assigned:2022-02-08
Published:2022-02-08
Updated:2022-09-09
Summary: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.
CVSS v3 Severity:9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-287
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2022-0547

Source: CCN
Type: OpenVPN Web site
CVE-2022-0547: Potential authentication by-pass with multiple deferred authentication plug-ins

Source: MISC
Type: Vendor Advisory
https://community.openvpn.net/openvpn/wiki/CVE-2022-0547

Source: MISC
Type: Vendor Advisory
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements

Source: XF
Type: UNKNOWN
openvpn-cve20220547-sec-bypass(222201)

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20220503 [SECURITY] [DLA 2992-1] openvpn security update

Source: FEDORA
Type: Mailing List, Patch, Release Notes, Third Party Advisory
FEDORA-2022-cb4c1146dc

Source: FEDORA
Type: Mailing List, Patch, Release Notes, Third Party Advisory
FEDORA-2022-7d46acce7c

Source: MISC
Type: Patch, Vendor Advisory
https://openvpn.net/community-downloads/

Source: CCN
Type: IBM Security Bulletin 6592807 (MaaS360)
IBM MaaS360 Cloud Extender Agent, Mobile Enterprise Gateway and VPN module have multiple vulnerabilities (CVE-2021-22060, CVE-2022-22950, CVE-2022-0547, CVE-2022-0778, CVE-2022-22965)

Vulnerable Configuration:Configuration 1:
  • cpe:/a:openvpn:openvpn:*:*:*:*:*:*:*:* (Version >= 2.5.0 and < 2.5.6)
  • OR cpe:/a:openvpn:openvpn:*:*:*:*:*:*:*:* (Version >= 2.1.0 and < 2.4.12)

  • Configuration 2:
  • cpe:/o:fedoraproject:fedora:34:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:36:*:*:*:*:*:*:*

  • Configuration 3:
  • cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:7727
    P
    openvpn-2.5.6-150400.3.6.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:3612
    P
    libjavascriptcoregtk-3_0-0-2.4.11-23.20 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:516
    P
    Security update for openvpn (Moderate)
    2022-06-03
    oval:org.opensuse.security:def:95242
    P
    Security update for openvpn (Moderate)
    2022-06-03
    oval:org.opensuse.security:def:119042
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:101572
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:125679
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:5993
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:119163
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:841
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:126845
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:118666
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:119352
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:127242
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:118856
    P
    Security update for openvpn (Important)
    2022-03-29
    oval:org.opensuse.security:def:119537
    P
    Security update for openvpn (Important)
    2022-03-29
    BACK
    openvpn openvpn *
    openvpn openvpn *
    fedoraproject fedora 34
    fedoraproject fedora 36
    debian debian linux 9.0