Merge pull request #1350 from p12tic/fix-file-handles-leak

Fix file descriptor leak on incomplete connections [SECURITY VULNERABILITY CVE-2021-42075]

src/lib/server/ClientListener.cpp

@@ -194,6 +194,11 @@ ClientListener::handleUnknownClient(const Event&, void* vclient)
                             new TMethodEventJob<ClientListener>(this,
                                 &ClientListener::handleClientDisconnected,
                                 client));
+    } else {
+        auto* stream = unknownClient->getStream();
+        if (stream) {
+            stream->close();
+        }
     }
 
     // now finished with unknown client