Authentication Bypass in OpenVPN by OpenVPN Technologies
CVE-2022-0547

9.8CRITICAL

Key Information:

Vendor

Openvpn
Status
Openvpn
Vendor
CVE Published:
18 March 2022

What is CVE-2022-0547?

OpenVPN versions 2.1 through 2.4.12 and 2.5.6 are susceptible to a vulnerability that permits authentication bypass when using external authentication plugins. This flaw arises when multiple plugins implement deferred authentication replies, allowing an external user to gain unauthorized access with incomplete credentials. This can compromise the integrity of secure connections, making it essential for users to upgrade to patched versions immediately to protect against potential exploits.

Affected Version(s)

OpenVPN version 2.1 until version 2.4.12 and 2.5.6.

References

https://community.openvpn.net/openvpn/wiki/SecurityAnnoun...
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https://community.openvpn.net/openvpn/wiki/CVE-2022-0547
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https://openvpn.net/community-downloads/
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CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.