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Re: [Openvpn-users] OpenSSL Security Advisory [30 September 2003]


  • Subject: Re: [Openvpn-users] OpenSSL Security Advisory [30 September 2003]
  • From: "James Yonan" <jim@xxxxxxxxx>
  • Date: Wed, 1 Oct 2003 09:13:26 -0000

Rob Fowler <Rob.Fowler@xxxxxxxxxxxxxxxxxxxx> said:

> Heads up. I don't know if this would affect is, just passing the info along:
> 
> http://www.openssl.org/news/secadv_20030930.txt

My reading of this advisory is that it would only affect OpenVPN
configurations which use TLS mode without --tls-auth (One of the reasons for
implementing --tls-auth in the first place, was to protect against
vulnerabilities in OpenSSL's TLS implementation).

Nonetheless, it is certainly a good idea to upgrade.  As soon as I can manage
to download 0.9.7c, I will rebuild a new windows version (1.5-beta9) with
updated DLLs.

In the mean time you can protect yourselves by either (a) using static keys or
(b) using TLS with --tls-auth (provided that the remote VPN peer you are
connecting to is trusted).

If you are connecting to a remote OpenVPN peer which is untrusted (i.e. one
that despite being authorized to connect with you, might also try to attack
you), then using static keys would be a better bet, though I imagine that the
vast majority of OpenVPN users are connecting to trusted peers.

James


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