Issue #11031 has been updated by Daniel Pittman.

Ken Barber wrote:
> Dan Bode wrote:
> > Having some way to configure that certain facts should not be sent to the 
> > master would be an acceptable solution for my use case.
> 
> A configuration option which allows you to specify exclusions is an old 
> discussion. Something that supports masks/wildcards and such?

We have no evidence to date that wildcards are needed, just a plain blacklist 
to exclude certain facts by name on some clients.

> This could be an element in the puppet configuration that decides what is 
> sent to a master. Arguably the problem also appears for mcollective 
> registration as well I suppose, so a facter global configuration is also an 
> option: #11449.

Seems like a justification for configuration over Facter, yup.


----------------------------------------
Bug #11031: capturing ec2 userdata as a fact may be a security risk
https://projects.puppetlabs.com/issues/11031

Author: Dan Bode
Status: Investigating
Priority: Normal
Assignee: Adrien Thebo
Category: 
Target version: 1.6.x
Keywords: 
Branch: 
Affected Facter version: 


When cloud-init is used for bootstrapping nodes, a script contained in the 
userdata is often passed to the node to perform bootstrapping.

In the case of cloud formation, this script often contains IAM credentials 
(access code/secret code) that are used to call cfn-init.

In my integration of PE with cloudformation, I can see the AWS credentials in 
the inventory service when running  b/c they are captured as a part of the ec2 
metadata.

This is not that big of a deal for my use case b/c the credentials only refer 
to a temporary account that only has the permissions to read metadata from 
cloudformation instances.

In general, I have concerns over rather capturing userdata with facter may 
potentially (and unexpectedly) expose a user's credentials in some cases.


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