Land rapid7#19253, Corrected a mistaken CVE

Corrected a mistaken CVE-ID in exploit references.

Author: smcintyre-r7

modules/exploits/unix/http/zivif_ipcheck_exec.rb

@@ -22,7 +22,7 @@ def initialize(info = {})
         'Author' => [ 'Silas Cutler (p1nk)' ],
         'References' => [
           [ 'URL', 'https://seclists.org/fulldisclosure/2017/Dec/42' ],
-          [ 'CVE', '2017-171069' ]
+          [ 'CVE', '2017-17105' ]
         ],
         'Platform' => 'unix',
         'Targets' => [