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| Subject: | Re: Mozilla Thunderbird SMTP down-negotiation weakness |
|---|---|
| Date: | Wed, 26 Oct 2005 22:35:27 +1300 |
Thomas Henlich wrote:
Sequence of attack
- S sends EHLO response with STARTTLS advertisement. - A4 discards S's STARTTLS advertisement. - PLAIN authentication takes place. - A4 can read cleartext password.
RESOLUTION
For A1-A3 no resolution is known. For A4, set user preference to enforce TLS.
Comment about A4.
Doesn't sound like a hole to me.
-- Cheers
Jason Haar Information Security Manager, Trimble Navigation Ltd. Phone: +64 3 9635 377 Fax: +64 3 9635 417 PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1
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