Bugtraq mailing list archives
Re: Insecure IKE Implementations Clarification
From: Florian Weimer <fw () deneb enyo de>
Date: Fri, 12 Dec 2003 23:00:31 +0100
Thor Lancelot Simon wrote:
For what it's worth, the possibility of this general type of attack was repeatedly discussed in the IPsec working group and is a major reason why XAUTH was abandoned. The particular password-stealing attack that I describe as been widely discussed among IKE implementors for at least two years; other implementors probably independently noticed it at least as early as I did, which was three years ago.
And we have technology deployed that solves exactly the same problem in a reasonable way: SSH.
What's pretty disturbing is that there is wide understanding of this issue among actual protocol implementors, but that Cisco field personnel continue to quite plainly tell customers that it does not exist at all, even when the risk to those customers is huge.
I have to admit that we were blinded as well. I didn't look too closely at XAUTH at that time because it was proprietary software and no GNU/Linux client was in sight. We should have forced Cisco to implement hybrid mode over two years ago, but failed to do so. I'm sorry about that mess.
Current thread:
- Re: Insecure IKE Implementations Clarification Thor Lancelot Simon (Dec 12)
- Re: Insecure IKE Implementations Clarification Florian Weimer (Dec 13)
- Re: Insecure IKE Implementations Clarification Thor Lancelot Simon (Dec 13)
- Re: Insecure IKE Implementations Clarification Florian Weimer (Dec 13)
- Re: Insecure IKE Implementations Clarification Thor Lancelot Simon (Dec 13)
- Re: Insecure IKE Implementations Clarification Florian Weimer (Dec 13)
- SSH vs. IKE trust models (was Re: Insecure IKE Implementations Clarification) Thor Lancelot Simon (Dec 13)
- Re: SSH vs. IKE trust models (was Re: Insecure IKE Implementations Clarification) Florian Weimer (Dec 13)
- Re: SSH vs. IKE trust models (was Re: Insecure IKE Implementations Clarification) Jimi Thompson (Dec 15)
- Re: Insecure IKE Implementations Clarification Thor Lancelot Simon (Dec 13)
- Re: Insecure IKE Implementations Clarification Florian Weimer (Dec 13)
- Re: Insecure IKE Implementations Clarification Jun-ichiro itojun Hagino (Dec 13)