imap.google.com being spoofed?

chris coleman christocoleman at yahoo.com
Mon Oct 1 06:27:02 UTC 2012


Dmitri wrote:

Noticed offlineimap failing with

ERROR: Server SSL fingerprint
'6d1b5b5ee0180ab493b71d3b94534b5ab937d042' for hostname
'imap.gmail.com' does not match configured fingerprint. Please verify
and set 'cert_fingerprint' accordingly if not set yet.

I have in my .offlineimaprc
cert_fingerprint=f3043dd689a2e7dddfbef82703a6c65ea9b634c1

Repeated attempts to connect only succeed if I set maxconnections = 1.
With maxconnections = 5 I see the above error popping up halfway the
offlineimap session
(different threads hit different certs, I suppose).

Is it a genuine hacking attempt going on, or some misconfiguration somewhere?

Any easy way to gather extra info on these connections?
(I program in Python, but I have no time to read and modify
offlineimap, at least not now...)

Hi Dmitri,

Here are the steps to manually verify that gmail SSL certificate.

http://www.cyberciti.biz/faq/test-ssl-certificates-diagnosis-ssl-certificate/

Note that imap.gmail.com is accessible at 2 different ip addresses.

173.194.76.108
and 
173.194.76.109

So you should check both of them, by IP address, not by the hostname..

Let us know what you find out.
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