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Re: Mutt: failure to check server certificate in SMTP TLS connection
From: Honza Horak <hhorak () redhat com>
Date: Tue, 22 Mar 2011 09:29:44 +0100

On 9 March 2011 16:41, Tim<tim-security at sentinelchicken.org  
<https://lists.grok.org.uk/mailman/listinfo/full-disclosure>>  wrote:

It also turns out that I didn't test this issue enough. As I didn't
test with both gnutls and openssl. I only tested with gnutls. Mutt
actually works as I would expect with imaps, smtps and smtp -- with
starttls connection when using openssl. mutt appears to  be _broken_
when using gnutls for imaps, smtps and smtp -- with starttls. (on mutt 1.5.20).

Hi,

I've tested this behaviour using both - gnutls and openssl - and it seems like the only difference is that there is an error printed using openssl: "Certificate host check failed: certificate owner does not match hostname imap.myhost.web".

In both cases a user can accept the certificate, but there is no warning about certificate's hostname mishmash using gnutls, which is a vulnerability.

I just wanted to sum up the issue, do I understand it correctly?

Honza

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