A site allows file uploads. Explain a safe way to test whether uploads could lead to code execution.

Problem Statement

Explanation

Start by reviewing server responses and storage paths. Try only benign file types first. Check if uploads are served back from a public path. If you suspect execution, ask for explicit approval before attempting any dynamic file. Use a harmless marker file to see if the server interprets it or just stores it. Never attempt dangerous payloads without written consent, and never overwrite existing files. If risk is confirmed, recommend strong controls: strict allowlist, magic-byte checks, storage outside web root, and a download proxy.

Code Solution

SolutionRead Only

1) Upload benign.jpg → fetch via random URL
2) Verify no execution, only download behavior
3) Report evidence and propose controls

Practice Sets

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A site allows file uploads. Explain a safe way to test whether uploads could lead to code execution.

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

A site allows file uploads. Explain a safe way to test whether uploads could lead to code execution.

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Why is a written scope and Rules of Engagement mandatory before any ethical hacking test?

Which ordering matches the common PTES workflow?

In ethical hacking, what does “without authorization” generally imply for legality?

What is the purpose of a Safe Harbor clause in a vulnerability disclosure or bounty program?

Which activity is typically out of scope for standard penetration tests unless explicitly allowed?

More from Ethical hacking

Master Interviews
Anywhere, Anytime