Bug#639744: Compromised certificates for *.google.com issued by DigiNotar Root CA
On Wed, Aug 31, 2011 at 11:02:53PM -0500, Raphael Geissert wrote:
> On Tuesday 30 August 2011 23:30:19 Mike Hommey wrote:
> > On Wed, Aug 31, 2011 at 06:26:26AM +0200, Mike Hommey wrote:
> > > So, I'll put that on tiredness. That'd be several fraudulent
> > > certificates which fingerprint is unknown (thus even CRL, OCSP and
> > > blacklists can't do anything), and the mitigation involves several
> > > different intermediate certs that are cross-signed, which makes it kind
> > > of hard. Plus, there is the problem that untrusting the DigiNotar root
> > > untrusts a separate PKI used by the Dutch government.
>
> AFAICS, this last part is not true. The gov has one Root and DigiNotar's
> PKIOverheid is one if its leafs.
> Other DigiNotar CAs are the one derived from Entrust (seems to have been
> revoked), and a PKIOverheid G2 that I've seen mentioned in a few places (also
> derived from Entrust?)
>
> > > Add to the above that untrusting a root still allows users to override
> > > in applications, and we have no central way to not allow that. Aiui, the
> > > mozilla update is going to block overrides as well, but that involves
> > > the application side. NSS won't deal with that.
> >
> > See https://bugzilla.mozilla.org/show_bug.cgi?id=682927 which is now
> > open.
>
> Thanks for the link.
>
> FWIW, it seems that the government is ACKing [3] that DigiNotar re-signs
> certificates with its PKIOverheid CA for non-gov users of its now-untrusted
> DigiNotar Root CA.
>
> Action items based on what others are doing:
> 1. Disable DigiNotar Root CA: done
> 2. Disable other DigiNotar CAs (derived from Entrust)[4]: not done
> 3. Still permit Staat der Nederlanden CA and PKIoverheid: nothing to be done
>
> Item 2 is handled by Mozilla by matching /^DigiNotar/ and marking them as
> untrusted at the PMS level.
http://blog.mozilla.com/security/2011/09/02/diginotar-removal-follow-up/
On the NSS end, this is my understanding of the status (haven't gone
through the patches yet):
- It disables DigiNotar Root CA
- It untrusts the signatures from Entrust on the DigiNotar CAs
- It blacklists /^DigiNotar/ intermediates
All that at NSS level, making the solution work in all applications
using NSS, which is good.
I need to check what is done at PSM level now.
Mike
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