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Date: Fri, 7 Nov 2014 02:58:09 +0100
From: "Jason A. Donenfeld" <>
To: oss-security <>
Subject: Re: CVE Request: Qt Creator fails to verify SSH host key

On Fri, Nov 7, 2014 at 12:24 AM, Michael Samuel <> wrote:
> This is a serious bug (it certainly circumvents the security of
> OpenSSH),

My opinion too (obviously).

> but I think
> the proposed fix doesn't fit.

The patch on there most certainly won't be accepted -- it's just something
I hacked together in 5 minutes to use on my own project, and I figured the
Qt devs might get some inspiration to do it themselves, after seeing the
guts aren't really that hard.

> What might be a better solution is to store the public key for all
> devices, and accept
> if it matches any device you've talked to before.  On discovering a
> new device, it shows
> the fingerprint and prompts for a name/description.
> Then you can revoke devices in some other part of the UI when you need
> to clean up.

That actually seems like a decent compromise.  Though, it does mean if you
compromise one device that's ever been trusted, you compromise all others
by extension. But maybe that's okay for the use here.

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