An OpenVPN security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, and 21.10.
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Ubuntu Security Notice USN-5347-1
March 24, 2022
openvpn vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 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 21.10:
openvpn 2.5.1-3ubuntu1.1
Ubuntu 20.04 LTS:
openvpn 2.4.7-1ubuntu2.20.04.4
Ubuntu 18.04 LTS:
openvpn 2.4.4-2ubuntu1.7
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5347-1
CVE-2022-0547
Package Information:
https://launchpad.net/ubuntu/+source/openvpn/2.5.1-3ubuntu1.1
https://launchpad.net/ubuntu/+source/openvpn/2.4.7-1ubuntu2.20.04.4
https://launchpad.net/ubuntu/+source/openvpn/2.4.4-2ubuntu1.7
