YARN-1993. Cross-site scripting vulnerability in TextView.java. Contributed byKenji Kikushima.

hadoop-yarn-project/CHANGES.txt

@@ -293,6 +293,10 @@ Release 2.8.0 - UNRELEASED
     YARN-2454. Fix compareTo of variable UNBOUNDED in o.a.h.y.util.resource.Resources.
     (Xu Yang via junping_du)
 
+    YARN-1993. Cross-site scripting vulnerability in TextView.java. (Kenji Kikushima
+    via ozawa)
+
+
 Release 2.7.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/view/TextView.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.yarn.webapp.view;
 
 import java.io.PrintWriter;
 
+import org.apache.commons.lang.StringEscapeUtils;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.yarn.webapp.View;
 
@@ -45,7 +46,9 @@ public abstract class TextView extends View {
   public void echo(Object... args) {
     PrintWriter out = writer();
     for (Object s : args) {
-      out.print(s);
+      String escapedString = StringEscapeUtils.escapeJavaScript(
+          StringEscapeUtils.escapeHtml(s.toString()));
+      out.print(escapedString);
     }
   }