vuln-fix: Temporary Directory Hijacking or Information Disclosure

This fixes either Temporary Directory Hijacking, or Temporary Directory Local Information Disclosure.

Weakness: CWE-379: Creation of Temporary File in Directory with Insecure Permissions
Severity: High
CVSSS: 7.3
Detection: CodeQL & OpenRewrite (https://public.moderne.io/recipes/org.openrewrite.java.security.UseFilesCreateTempDirectory)

Reported-by: Jonathan Leitschuh <Jonathan.Leitschuh@gmail.com>
Signed-off-by: Jonathan Leitschuh <Jonathan.Leitschuh@gmail.com>

Bug-tracker: JLLeitschuh/security-research#10


Co-authored-by: Moderne <team@moderne.io>

spring-websocket/src/test/java/org/springframework/web/socket/TomcatWebSocketTestServer.java

@@ -18,6 +18,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
 
 import javax.servlet.Filter;
 import javax.servlet.ServletContext;
@@ -70,9 +71,7 @@ public void setup() {
 
 	private File createTempDir(String prefix) {
 		try {
-			File tempFolder = File.createTempFile(prefix + ".", "." + getPort());
-			tempFolder.delete();
-			tempFolder.mkdir();
+			File tempFolder = Files.createTempDirectory(prefix + "." + "." + getPort()).toFile();
 			tempFolder.deleteOnExit();
 			return tempFolder;
 		}