Issue #15561 has been updated by Dustin Mitchell.

OK, then I think that's either a misconfiguration (not including the namecheap 
CA cert in the puppet configuration, although if that's required it should be 
documented) or a different bug (puppet uses its internal list of CAs rather 
than the default from libcurl or something like that when submitting reports 
via HTTPS).  It happened that your use-case showed the error message described 
in this ticket first, before it got to the "unable to get local issuer 
certificate" error, which is the real problem for you.

@Jeff, how do you think validation of such HTTPS servers should be handled?

----------------------------------------
Bug #15561: Fix for CVE-2012-3867 is too restrictive
https://projects.puppetlabs.com/issues/15561#change-87819

* Author: Dustin Mitchell
* Status: Merged - Pending Release
* Priority: Urgent
* Assignee: 
* Category: SSL
* Target version: 3.2.0
* Affected Puppet version: 2.7.18
* Keywords: certificate
* Branch: https://github.com/puppetlabs/puppet/pull/1556
----------------------------------------
The fix for CVE-2012-3867 involves checking certificate subjects for "weird" 
characters.  From my read of the CVE entry, this is to filter out characters 
that would cause the name to display in a manner visually indistinguishable 
from a valid hostname.

However, the check is too restrictive:

Could not retrieve catalog from remote server: Certname "puppetagain base 
ca/emailaddress=rele...@mozilla.com/ou=release engineering/o=mozilla, inc." 
must not contain unprintable or non-ASCII characters

In particular, / is a very common character in subjects, and should be allowed. 
 Puppet is seeing this subject on my base CA - I'm using certificate chaining.

The fix is one character, so I haven't included a patch, but I'm happy to make 
a pull req if necessary.

Another fix would be to only verify certificate subjects for the leaf 
certificate, and not any of the certs in its signing chain, but that seems less 
secure.

It's also worth noting that the regex is overly broad, since it downcases the 
string, then accepts A-Z among other characters.


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