vuln-fix: Temporary File Information Disclosure

This fixes temporary file information disclosure vulnerability due to the use
of the vulnerable `File.createTempFile()` method. The vulnerability is fixed by
using the `Files.createTempFile()` method which sets the correct posix permissions.

Weakness: CWE-377: Insecure Temporary File
Severity: Medium
CVSSS: 5.5
Detection: CodeQL & OpenRewrite (https://public.moderne.io/recipes/org.openrewrite.java.security.SecureTempFileCreation)

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

Bug-tracker: JLLeitschuh/security-research#18


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

src/main/java/org/apache/mahout/pig/LogisticRegression.java

@@ -38,6 +38,7 @@
 import org.apache.pig.impl.util.UDFContext;
 
 import java.io.*;
+import java.nio.file.Files;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
@@ -159,7 +160,7 @@ public LogisticRegression(String modelParams) throws IOException {
         }
 
         if (!inMemory) {
-            tmpFile = File.createTempFile("trainingData", "tmp");
+            tmpFile = Files.createTempFile("trainingData", "tmp").toFile();
             tmpFile.deleteOnExit();
         }
     }