World Writable Mounts Need Sticky Bit

##### ISSUE TYPE
* Bug Report

##### COMPONENT NAME
component:api

##### CLOUDSTACK VERSION
~~~
4.17
4.18
~~~

##### OS / ENVIRONMENT
Ubuntu
Rocky Linux 8

##### SUMMARY
In java code, NFS mounts are not consistently set to 1777 to prevent world writable issues.

References to correct setting
```
./server/src/main/java/org/apache/cloudstack/storage/NfsMountManagerImpl.java: script.add("1777", mountPoint);
./plugins/hypervisors/vmware/src/main/java/com/cloud/hypervisor/vmware/manager/VmwareManagerImpl.java: script.add("1777", mountPoint);

```

#### Change 777 to 1777

#### ./services/secondary-storage/server/src/main/java/org/apache/cloudstack/storage/resource/LocalNfsSecondaryStorageResource.java
```java
@Override
protected void mount(String localRootPath, String remoteDevice, URI uri, String nfsVersion) {
ensureLocalRootPathExists(localRootPath, uri);

if (mountExists(localRootPath, uri)) {
return;
}

attemptMount(localRootPath, remoteDevice, uri, nfsVersion);

// Change permissions for the mountpoint - seems to bypass authentication
Script script = new Script(true, "chmod", _timeout, s_logger);
script.add("777", localRootPath);
String result = script.execute();
if (result != null) {
String errMsg = "Unable to set permissions for " + localRootPath + " due to " + result;
s_logger.error(errMsg);
throw new CloudRuntimeException(errMsg);
}
s_logger.debug("Successfully set 777 permission for " + localRootPath);

// XXX: Adding the check for creation of snapshots dir here. Might have
// to move it somewhere more logical later.
checkForSnapshotsDir(localRootPath);
checkForVolumesDir(localRootPath);
}

```
#### ./plugins/hypervisors/hyperv/src/main/java/com/cloud/hypervisor/hyperv/manager/HypervManagerImpl.java
```java
protected String mount(String path, String parent, String scheme, String query) {
String mountPoint = setupMountPoint(parent);
if (mountPoint == null) {
s_logger.warn("Unable to create a mount point");
return null;
}

Script script = null;
String result = null;
if (scheme.equals("cifs")) {
String user = System.getProperty("user.name");
Script command = new Script(true, "mount", _timeout, s_logger);
command.add("-t", "cifs");
command.add(path);
command.add(mountPoint);

if (user != null) {
command.add("-o", "uid=" + user + ",gid=" + user);
}

if (query != null) {
query = query.replace('&', ',');
command.add("-o", query);
}

result = command.execute();
}

if (result != null) {
s_logger.warn("Unable to mount " + path + " due to " + result);
File file = new File(mountPoint);
if (file.exists()) {
file.delete();
}
return null;
}

// Change permissions for the mountpoint
script = new Script(true, "chmod", _timeout, s_logger);
script.add("-R", "777", mountPoint);
result = script.execute();
if (result != null) {
s_logger.warn("Unable to set permissions for " + mountPoint + " due to " + result);
}
return mountPoint;
}

```

LocalNfsSecondaryStorageResource.java と HypervManagerImpl.java から始め、マウント権限の処理を NfsMountManagerImpl.java と VmwareManagerImpl.java の実装と比較します。全ユーザーが書き込み可能なマウントに関する一貫性のない設定を、sticky bit を使用するように更新し、影響を受けるマウントパスで 777 が使用されなくなったことを確認します。

索引モデルが issue の本文から書いたものです。