[OpenVPN-NL] OpenVPN-NL v2.3.1-nl1 released

[Steffan Karger]

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A new version of OpenVPN-NL is available on the OpenVPN-NL site [1].
This version is based on OpenVPN 2.3.1, which integrates PolarSSL 1.2
support [2].

The new version of PolarSSL contains a number of security fixes, in
particular fixes against the 'Lucky Thirteen' SSL attack. For a full
list of changes, please refer to the OpenVPN site [3].

The new version of OpenVPN fixes a security issue where an attacker
with a man-in-the-middle position could inject arbitrary ciphertext
into the data channel [4].

Due to the number of improvements, we strongly recommend that you
upgrade to the new version of OpenVPN-NL.

*nix packages renamed
- - ---------------------

The package and executable name for the Red Hat, Suse, Debian and
Ubuntu packages have been changed to openvpn-nl, to allow it to be
deployed alongside a regular openvpn installation.

Furthermore, OpenVPN-NL now looks for config files in /etc/openvpn-nl/.

To update your packages version, install the new openvpn-nl package
and migrate your configuration.


PolarSSL 1.2
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Most relevant for OpenVPN is the addition of Galois Counter Mode (GCM)
for AES-based TLS ciphers. The preferred TLS mode has been updated to
TLS-DHE-RSA-WITH-AES-256-GCM-SHA384. Furthermore, the PolarSSL API has
changed in several places, requiring changes to OpenVPN code.


New deployment advisory
- - -----------------------

The deployment advisory has been updated to v1.3. This version
deprecates version 1.2 and advises the usage of OpenVPN-NL 2.3.


Minor changes
- - -------------

 - The command line parameter --use-urandom allows for /dev/urandom
to be used as a random source instead of /dev/random on *nix platforms.

 - x509 certificate subject and issuer strings containing \0 characters
are now rejected.


References
- - ----------

[1] https://openvpn.fox-it.com/

[2] https://polarssl.org/tech-updates/releases

[3] https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn23

[4]
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc
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