I came across an issue this week where the default image search for CentOS in kitchen-ec2 tried to pull in an image not provided by CentOS themselves. It seems sketchy to say the least, and is likely a potential security issue for anyone just blindly accepting marketplace subscriptions.
Here are the details of the ticket I opened (24494). I was instructed to submit this as an enhancement in addition to it being marked as a bug on the backend.
I noticed a very strange issue with kitchen-ec2 today. The CentOS image filter appears to be broken in that it does not point to the official CentOS AMIs. The error (attached in a text file) points to this marketplace URL which looks sketchy to say the least: https://aws.amazon.com/marketplace/pp?sku=67xglex2rdpaymxh17620nfoy
My guess is that this line isn't a great way to filter the images?
If I adjust my kitchen file under the centos-7 platform with filters, a more correct image is chosen.
- name: centos-7
That product code is pulled directly from the CentOS wiki: https://wiki.centos.org/Cloud/AWS#Images
A further mystery (I think this is outside of your scope) is why the latest image is used according to the AWS portal, but the /etc/centos-release file does not match).