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Message-ID: <20261021221320.yvmxkcet7zjtvoq6@jwilk.net>
Date: Thu, 22 Oct 2026 00:13:20 +0200
From: Jakub Wilk <jwilk@...lk.net>
To: oss-security@...ts.openwall.com
Subject: Re: eMudhra Intermediates Compromise
* Solar Designer <solar@...nwall.com>, 2026-10-21 07:54:
>On Tue, Oct 20, 2026 at 03:44:34PM -0400, Jeffrey Walton wrote:
>>It is probably worth noting the Comodo AAA Services Root removal is
>>not related to the eMudhra incident.
>Are you sure? Doesn't it cross-sign the compromised intermediates?
It does cross-sign them.
>>The issue with Comodo AAA Services Root was the removal of the TLS
>>trust bit by browsers because the root is too old. The current
>>CA/Browser (CA/B) Baseline Requirements (BR) policies say a root has a
>>maximum lifespan of 15 years from creation date. Comodo AAA Services
>>Root was issued in 2004, so it violates current policy. Also see
>><https://cabforum.org/working-groups/server/baseline-requirements/>.
FWIW, I couldn't find such a requirement in CA/B BR.
>This may be right, but perhaps the urgency to remove it now is related
>to the eMudhra incident?
>
>Incidentally, it is not yet removed in NSS 3.131.1, which does remove
>the emSign certs. An omission to fix in a further update urgently?
AFAICT the Comodo AAA cert hasn't been removed from NSS, but it had the
web trust bit turned off last year:
https://bugzilla.mozilla.org/show_bug.cgi?id=1957685
That said, my Firefox 153 ESR (which is supposed to include that change)
still trusted the Comodo AAA cert, so I'm confused.
--
Jakub Wilk
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