Posts in #nixos

KalmarCTF 2025 Write-up: Reproducible Pwning

2025-08-26 · 16 minute read

This is a write-up of the “Reproducible Pwning” challenge from KalmarCTF 2025. This challenge takes us through the inner workings of Nix and a very interesting privilege escalation that has made me change my own NixOS configuration.