[SSHD-1141] DefaultClientKexExtensionHandler: ensure list is modifiable

apache · Apr 14, 2021 · 60b50f9 · 60b50f9
1 parent 797d887
commit 60b50f9
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/.../src/main/java/org/apache/sshd/common/kex/extension/DefaultClientKexExtensionHandler.java b/.../src/main/java/org/apache/sshd/common/kex/extension/DefaultClientKexExtensionHandler.java
@@ -129,7 +129,7 @@ protected void handleServerSignatureAlgorithms(Session session, Collection<Strin
         // Client determines order; server says what it supports. Re-order such that supported ones are
         // at the front, in client order, followed by unsupported ones, also in client order.
         if (serverAlgorithms != null && !serverAlgorithms.isEmpty()) {
-            List<NamedFactory<Signature>> clientAlgorithms = session.getSignatureFactories();
+            List<NamedFactory<Signature>> clientAlgorithms = new ArrayList<>(session.getSignatureFactories());
             if (log.isDebugEnabled()) {
                 log.debug("handleServerSignatureAlgorithms({}): PubkeyAcceptedAlgorithms before: {}", //$NON-NLS-1$
                         session, clientAlgorithms);