Re: Mozilla Thunderbird SMTP down-negotiation weakness
Jason Haar <Jason.Haar@xxxxxxxxxxxxx> wrote:
>
>Thunderbird explicitly allows you "TLS, if available" - which appears to
>be what you refer to. However, there is a "TLS" - which means only do
>TLS - and alert if the TLS certificate presented doesn't match a known
>one (which would happen in a MITM).
>
>Are you referring to a bug in their "TLS" mode - or implying that "TLS,
>if available" is somehow not... what it says it is...???
>
>Doesn't sound like a hole to me.
The "TLS, if available" option is common to most MUAs and is a serious
security problem.
Thunderbird has other security-related user interface problems. For
example, the account setup wizard creates accounts with insecure
settings by default and then encourages users to log in immediately
and compromise their passwords.
http://www.livejournal.com/users/fanf/39428.html
Tony.
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