description: Versions of MCollective prior to 2.10.4 deserialized YAML from agents without calling safe_load, allowing the potential for arbitrary code execution on the server. The fix for this is to call YAML.safe_load on input. This has been tested in all Puppet-supplied MCollective plugins, but there is a chance that third-party plugins could rely on this insecure behavior.
problem types: Remote Code Execution Via YAML Deserialization
affected:
{
product: mcollective, Puppet, Puppet Enterprise
vendor: Puppet
versions:
status: affected, version: Puppet Enterprise prior to 2016.4.5, Puppet Enterprise 2016.5.x, Puppet Enterprise 2017.1.x, Puppet Agent prior to 1.10.1
}