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Ubuntu Security Notice USN-6850-1
June 26, 2024

openvpn vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

OpenVPN could allow unintended access to network services.

Software Description:
- openvpn: virtual private network software

Details:

It was discovered that OpenVPN incorrectly handled certain configurations
with multiple authentication plugins. A remote attacker could possibly use
this issue to bypass authentication using incomplete credentials.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS
   openvpn                         2.3.10-1ubuntu2.2+esm1
                                   Available with Ubuntu Pro

Ubuntu 14.04 LTS
   openvpn                         2.3.2-7ubuntu3.2+esm1
                                   Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-6850-1
   CVE-2022-0547