[ofbiz-framework] branch release17.12 updated: Improved: Improve ObjectInputStream denyList (OFBIZ-12221)

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jleroux pushed a commit to branch release17.12
in repository https://gitbox.apache.org/repos/asf/ofbiz-framework.git


The following commit(s) were added to refs/heads/release17.12 by this push:
     new 27adfed  Improved: Improve ObjectInputStream denyList (OFBIZ-12221)
27adfed is described below

commit 27adfed9f0293f08563aca09e125b78966a84635
Author: Jacques Le Roux <[hidden email]>
AuthorDate: Mon Apr 5 17:03:12 2021 +0200

    Improved: Improve ObjectInputStream denyList (OFBIZ-12221)
   
    Prevents generics markup in string type names.
   
    Conflict handled by hand
      framework/base/src/main/java/org/apache/ofbiz/base/util/SafeObjectInputStream.java
---
 .../main/java/org/apache/ofbiz/base/util/SafeObjectInputStream.java  | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/framework/base/src/main/java/org/apache/ofbiz/base/util/SafeObjectInputStream.java b/framework/base/src/main/java/org/apache/ofbiz/base/util/SafeObjectInputStream.java
index 5dc785a..5c1b8b6 100644
--- a/framework/base/src/main/java/org/apache/ofbiz/base/util/SafeObjectInputStream.java
+++ b/framework/base/src/main/java/org/apache/ofbiz/base/util/SafeObjectInputStream.java
@@ -65,8 +65,9 @@ public final class SafeObjectInputStream extends ObjectInputStream {
     @Override
     protected Class<?> resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException {
         String className = classDesc.getName();
-        // BlackList exploits; eg: don't allow RMI here
-        if (className.contains("java.rmi")) {
+        // DenyList
+        if (className.contains("java.rmi") // Don't allow RMI
+                || className.contains("<")) { // Prevent generics markup in string type names
             throw new InvalidClassException(className, "Unauthorized deserialisation attempt");
         }
         if (!whitelistPattern.matcher(className).find()) {