Update security rulesets

Hello. 

It is possible, to update security rules? I found in the example_base_ruleset.xml  two rules: 

```
<rule ref="Security.CVE.20132110"/>
<rule ref="Security.CVE.20134113"/>
```

Could you update or send any recommendations - how to update? :) Only way is to write on my own a new one based on bugs.php.net ?

