[GitHub] [tomcat] markt-asf commented on a change in pull request #176: CoyoteAdapter: fix out-of-bounds read in checkNormalize

[GitBox <gi...@apache.org>]

markt-asf commented on a change in pull request #176: CoyoteAdapter: fix out-of-bounds read in checkNormalize
URL: https://github.com/apache/tomcat/pull/176#discussion_r299493101
 
 

 ##########
 File path: java/org/apache/catalina/connector/CoyoteAdapter.java
 ##########
 @@ -1271,6 +1276,11 @@ public static boolean checkNormalize(MessageBytes uriMB) {
             }
         }
 
+        // The URL must start with '/'
+        if (c[start] != '/') {
+            return false;
+        }
+
         // Check for ending with "/." or "/.."
 
 Review comment:
   I don't see how that can trigger a 500. The request line:
   `GET  %20%2e%2e%20%30%20%0a HTTP/1.1`
   is going to result in a 400 response in all current Tomcat versions.
   Please provide a request line example that triggers the exception in the original report.

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