GeistHaus
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5 posts
Polling state
Status active
Last polled May 18, 2026 18:37 UTC
Next poll May 19, 2026 18:03 UTC
Poll interval 86400s
ETag W/"f5e5f40412f7f62292667e88d0458b1b"
Last-Modified Sat, 25 Apr 2026 00:59:17 GMT

Posts

CTF Write-up: BlackBox (misc)
ctf
dumping avr/atmega328/arduino firmware, pure static analysis, speed ctf solve, xor crib dragging over ciphertext with known plaintext attack, cyberchef
https://ud2.dev/blog/blackbox/
CTF Write-up: Slippy (Web)
ctf
Walkthrough of the Slippy web challenge — abusing symlink extraction in ZIP uploads to escape the sandbox and retrieve the flag.
https://ud2.dev/blog/slippy/
CTF Write-up: Pyjail (misc)
ctf
Bypassing eval-based restrictions, reconstructing forbidden strings, escaping a builtins blacklist, and exploiting memory manipulation to defeat privilege dropping and read the flag.
https://ud2.dev/blog/pijail/