Modernize and secure temp file creation

pixeebot[bot] commented 6 months ago

This change replaces the usage of java.io.File#createTempFile with java.nio.file.Files#createTempFile which has more secure attributes.

The java.io.File#createTempFile() method creates a file that is world-readable and world-writeable, which is almost never necessary. Also, the file created is placed in a predictable directory (e.g., /tmp). Having predictable file names, locations, and will lead to many types of vulnerabilities. History has shown that this insecure pattern can lead to information leakage, privilege escalation and even code execution.

Our changes look something like this:

+  import java.nio.file.Files;
   ...
-  File txtFile = File.createTempFile("acme", ".txt");
+  File txtFile = Files.createTempFile("acme", ".txt").toFile();

Micro-Learning Topic: Information disclosure (Detected by phrase)

Matched on "information leakage"

Many web applications and APIs do not properly protect sensitive data, such as financial, healthcare, and PII. Attackers may steal or modify such weakly protected data to conduct credit card fraud, identity theft, or other crimes. Sensitive data may be compromised without extra protection, such as encryption at rest or in transit, and requires special precautions when exchanged with the browser. Source: https://www.owasp.org/index.php/Category:OWASP_Top_Ten_Project

Try a challenge in Secure Code Warrior

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git-greetings[bot] commented 6 months ago

PR Details of @pixeebot[bot] in Universite-Gustave-Eiffel-NoiseCapture :	OPEN	CLOSED	TOTAL
4	3	7

pixeebot[bot] commented 6 months ago

I'm confident in this change, but I'm not a maintainer of this project. Do you see any reason not to merge it?

If this change was not helpful, or you have suggestions for improvements, please let me know!

pixeebot[bot] commented 6 months ago

Just a friendly ping to remind you about this change. If there are concerns about it, we'd love to hear about them!

pixeebot[bot] commented 6 months ago

This change may not be a priority right now, so I'll close it. If there was something I could have done better, please let me know!

You can also customize me to make sure I'm working with you in the way you want.

2lambda123 / Universite-Gustave-Eiffel-NoiseCapture