Proving Grounds Writeups

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Intermediate Linux

Pathway Writeup - Proving Grounds

Intermediate Linux box exposing an unauthenticated LocalStack S3 bucket with plaintext credentials in users.json, used to SSH in as brian, then escalating to root by abusing an LD_PRELOAD-preserving sudo rule with a malicious shared object.

privilege-escalation sudo-misconfiguration ld-preload s3 +2

The Husky Hacker • Oct 6, 2026 • 3 min read

Other platforms

HackTheBox 92 TryHackMe 10 All writeups