Index: src/main/java/org/apache/logging/log4j/core/config/ConfigurationFactory.java
===================================================================
--- src/main/java/org/apache/logging/log4j/core/config/ConfigurationFactory.java	(revision 20404)
+++ src/main/java/org/apache/logging/log4j/core/config/ConfigurationFactory.java	(working copy)
@@ -417,6 +417,21 @@
                         }
                     }
                 }
+                else {
+                  for (final ConfigurationFactory factory : factories) {
+                    final String[] types = factory.getSupportedTypes();
+                    if (types != null) {
+                        for (final String type : types) {
+                            if (type.equals("*")) {
+                                final Configuration configuration = factory.getConfiguration(name, configLocation); // configLocation == null
+                                if (configuration != null) {
+                                    return configuration;
+                                }
+                            }
+                        }
+                    }
+                  }
+                }
             } else {
                 for (final ConfigurationFactory factory : factories) {
                     final String[] types = factory.getSupportedTypes();