## Bug Fixes

- Restore compatibility with Ruby 2.2.
- Resolve failures to detect the ip address on some Solaris systems.

## Security 

### Rubygems

Rubygems has been updated from 2.6.13 to 2.6.14, fixing 4 CVEs:

- [CVE-2017-0899](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0899)
- [CVE-2017-0900](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0900)
- [CVE-2017-0901](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0901)
- [CVE-2017-0902](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0902)

## Ohai Critical Plugins Functionality

Users can now specify a list of plugins which are critical for the Chef
run. Critical plugins will cause Ohai to fail if they do not run
successfully (and thus cause a Chef run using Ohai to fail). The syntax
for this is:

```ruby
ohai.critical_plugins << :Filesystem
```