Issue #15561 has been updated by Jeff McCune.

Status changed from In Topic Branch Pending Review to Merged - Pending Release

summary: Merged into master as 4bfad67.  This should be released in Puppet 3.2. 
 Thanks again for the contribution!

@all watchers

Could you please grab a copy of the master branch and try out the new behavior? 
 If it's a PITA for you to run Puppet from source in this manner, I'd be happy 
to build an RPM for people to try out, but I'd prefer to do it only for EL 6 if 
possible.

Please comment here if you're able to try out the pre-release version of this 
patch in order to help us verify we've fixed this issue for the most common 
cases.

Thanks,
-Jeff

----------------------------------------
Bug #15561: Fix for CVE-2012-3867 is too restrictive
https://projects.puppetlabs.com/issues/15561#change-87660

* 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/[email protected]/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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