$ cat writeup.md…
$ cat writeup.md…
grodno_new_year_2026
Task: Heap-based note manager binary with an off-by-one bug and an admin check function that compares a hash against itself. Solution: Ignored the red herring heap vulnerability and simply called the check_admin function (menu option 5), which always passes because admin_hash is computed from the same admin_key at startup.
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