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fulldisclosure logo Full Disclosure mailing list archives

Re: Certificate spoofing issue with Mozilla, Konqueror, Safari 2
From: Alexander Klink <a.klink () cynops de>
Date: Wed, 5 Dec 2007 09:26:18 +0100

Hi,

On Sun, Nov 18, 2007 at 10:21:18PM +0100, Nils Toedtmann wrote:
        DN="CN=www.example.com"
        subjectAltName:dNSName=www.example.com
        subjectAltName:dNSName=www.paypal.com

    and lures the user to https://www.example.com/. The user gets an
    "unknown CA" warning, but the "subjectAltName:dNSName" extensions
    are not shown to him, so the cert looks ok. As he does not plan to
This is particularly annoying as there is no way to actually view the
subjectAltNames in Mozilla (except for being able to translate the
hexdump in your head). At least they're planning to change the handling
of wildcards[0], so it is no longer enough to get that one certificate
with a subjectAltName of '*' installed.

Best regards,
    Alex

[0]: http://permalink.gmane.org/gmane.comp.mozilla.crypto/8429
-- 
Dipl.-Math. Alexander Klink | IT-Security Engineer |    a.klink () cynops de
 mobile: +49 (0)178 2121703 |          Cynops GmbH | http://www.cynops.de
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     Bad Homburg v. d. Höhe |                      |      Martin Bartosch

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  • Re: Certificate spoofing issue with Mozilla, Konqueror, Safari 2 Alexander Klink (Dec 05)
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