Fixes #6689 by moving to 7za which is included in the installer

modules/exploits/osx/browser/safari_metadata_archive.rb

@@ -75,7 +75,8 @@ class Metasploit3 < Msf::Exploit::Remote
 	end
 
 	def check_dependencies
-		return if Rex::FileUtils::find_full_path('zip')
+		@zip = (Rex::FileUtils::find_full_path('7za') || Rex::FileUtils::find_full_path('7za.exe'))
+		return if @zip
 		raise RuntimeError, "This exploit requires the zip command to be installed in your path"
 	end
 
@@ -109,7 +110,7 @@ class Metasploit3 < Msf::Exploit::Remote
 		fd.close
 
 		FileUtils.chmod(0755, tmov)
-		system('zip', tdir+'.zip', tmov, '__MACOSX/._'+tmov)
+		system(@zip, "a", tdir+'.zip', tmov, '__MACOSX/._'+tmov)
 
 		fd = File.new(tdir+'.zip')
 		data = fd.read(fd.stat.size)