Top posts

Every blog post that took off on Hacker News, ranked by the votes of its best submission. 678 posts.

Security & Privacy
2021
666

; Echo “Shell Injection”

This is an introductory article about shell injection, a security vulnerability allowing an attacker to execute arbitrary code on the user's machine. This is a well-studied problem, and there are simple and efficient solutions to it. It's relatively easy to design library API in such a way as to shield the application…

678

Ethereum is a Dark Forest

It’s no secret that the Ethereum blockchain is a highly adversarial environment. If a smart contract can be exploited for profit, it eventually will be. But this unforgiving environment pales in comparison to the mempool. If the chain itself is a battleground, the mempool is something worse: a dark forest.