vuln-fix: Zip Slip Vulnerability

This fixes a Zip-Slip vulnerability.

This change does one of two things. This change either

1. Inserts a guard to protect against Zip Slip.
OR
2. Replaces `dir.getCanonicalPath().startsWith(parent.getCanonicalPath())`, which is vulnerable to partial path traversal attacks, with the more secure `dir.getCanonicalFile().toPath().startsWith(parent.getCanonicalFile().toPath())`.

For number 2, consider `"/usr/outnot".startsWith("/usr/out")`.
The check is bypassed although `/outnot` is not under the `/out` directory.
It's important to understand that the terminating slash may be removed when using various `String` representations of the `File` object.
For example, on Linux, `println(new File("/var"))` will print `/var`, but `println(new File("/var", "/")` will print `/var/`;
however, `println(new File("/var", "/").getCanonicalPath())` will print `/var`.

Weakness: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Severity: High
CVSSS: 7.4
Detection: CodeQL (https://codeql.github.com/codeql-query-help/java/java-zipslip/) & OpenRewrite (https://public.moderne.io/recipes/org.openrewrite.java.security.ZipSlip)

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

Bug-tracker: JLLeitschuh/security-research#16

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

Author: JLLeitschuh

src/main/java/it/isislab/sof/core/engine/hadoop/mapreduce/mason/util/SimulationMASON.java

@@ -81,6 +81,9 @@ public static void unJar(File jarFile, File toDir, Pattern unpackRegex)
 					InputStream in = jar.getInputStream(entry);
 					try {
 						File file = new File(toDir, entry.getName());
+						if(!file.toPath().normalize().startsWith(toDir.toPath().normalize())) {
+							throw new IOException("Bad zip entry");
+						}
 						ensureDirectory(file.getParentFile());
 						OutputStream out = new FileOutputStream(file);
 						try {