Vulnerability Instance

Directory exposure in jetty
### Impact
If the `${jetty.base}` directory or the `${jetty.base}/webapps` directory is a symlink (soft link in Linux), the contents of the `${jetty.base}/webapps` directory may be deployed as a static web application, exposing the content of the directory for download. 

For example, the problem manifests in the following `${jetty.base}`:
```$ tree demo-base/
demo-base/
├── etc
├── lib
├── resources
├── start.d
├── deploy
│   └── async-rest.war
└── webapps -> deploy

``` 

### Workarounds
Do not use a symlink