Pwnhack Birds

in hacking communities — sometimes birds are used as metaphors in hacking (e.g., “shell birds,” “canary in a coal mine,” “tweet” as in Twitter → info leak, etc.)

This challenge isn't an isolated case. Other CTFs have featured challenges with names like "Birds," "HackyBird," and "gullible," solidifying the connection between "pwn" and "birds".

birds: ELF 64-bit LSB executable, x86-64, dynamically linked, not stripped

We get: =0%G0;<$00? — looks weird. But entering this as input? Let's test. pwnhack birds

: A volatile heavy-hitter whose explosive nature levels entire strongholds.

While "Pwnhack Birds" isn't a singular entity, birds are frequent icons in the "pwn" and hacking space: #10 Rules of Bug Bounty | HackerNoon

Increasing momentum mid-flight to shatter denser material barriers like stone or glass. Key Titles Influenced by Premium Avian Resources in hacking communities — sometimes birds are used

def call_sing(idx): p.sendlineafter('choice:', '3') p.sendlineafter('index:', str(idx))

However, entering the correct sequence triggers victory() , which calls system("/bin/sh") . But note — there’s a buffer overflow: read(0, buffer, size) with user-controlled size means we can overflow the heap buffer? Wait, no — it’s on heap, so no direct return address overwrite.

According to the PwnHack Privacy Policy , users connect using an isolated email address or username rather than exposing full login credentials. — looks weird

Earth stations and control centers that handle tracking, telemetry, and commanding (TT&C).

The ecosystem serves as a reminder that as the physical world becomes increasingly digitized, security cannot be treated as an afterthought—even when the hardware is flying hundreds of feet above our heads.

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Let's skip to the real vuln: In read(0, buffer, size) , size is user-controlled and relative to malloc’d size. That’s the bug. We can malloc 16 bytes but read 200 bytes → heap overflow.