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Frequency analysis or an online solver decodes the substitution-cipher paragraph to extract the picoCTF flag.
Break a monoalphabetic substitution cipher by performing frequency analysis and matching character distribution against standard English.
Overflow a heap buffer with 32 filler bytes then 'pico' to overwrite safe_var. Part of picoCTF 2024's heap exploitation series.
Overflow a 32-byte heap buffer to zero out safe_var and unlock the flag print routine. The first in picoCTF 2024's heap exploitation series.
Overflow a heap buffer to overwrite a function pointer with win()'s address and call it. Part of picoCTF 2024's heap series.
Exploit a heap-based vulnerability in a binary with use-after-free or double-free conditions. Manipulate the heap allocator to gain code execution and read the flag.