Канарейка — static canary leak via buffer over-read

bug_makers

Task: a C++ HTTP flag validator (GET /api/check?flag=) echoes input via printf %s. Solution: at exactly 32 bytes the echo over-reads past a char[32] buffer and leaks a FIXED stack canary (22818c2b); overflowing while re-writing the same canary verbatim bypasses stack-smashing protection and returns the flag.