Format String Exploitation: A Hands-On Exploration for Linux

This blogpost is a picoCTF challenge write-up that demonstrates exploiting a format string vulnerability to achieve remote code execution. It explains an information leak (address of setvbuf), calculates libc base, finds the input offset, and crafts a pwntools fmtstr_payload to overwrite the puts GOT entry with system, yielding a shell; the author also outlines mitigations such as input validation and secure coding.