Pwning

Brute-force stack canary byte-by-byte via fork’s PID oracle, leak libc with puts, then ORW ROP chain.

Two’s complement INT_MIN negation overflow bypasses an absolute-value check to trigger the win condition.

Use-after-free on a tcache chunk to overwrite a function pointer and call win().

Blind format-string exploit with ASLR off: leak stack address then use %n + call rax to redirect execution.

A ‘pwn’ binary with no input is really a static-reversing puzzle: a fake usleep loop would take days and a fake integrity check always passes, so reading the constants and undoing a single-byte XOR yields the flag without ever waiting.

A password-manager heap challenge: free() without nulling the pointer gives a use-after-free, tcache hands the freed Login chunk back via set_password, and overwriting the struct’s leading function pointer redirects an indirect call to the leftover read_master_key win function.

A textbook ret2win: gets() into a 32-byte stack buffer with no canary and no PIE lets us overwrite the saved return address with jackpot(); the only twist is closing stdin to force the menu loop’s EOF break so the corrupted return fires.

A food-ordering binary reads chef notes with gets() into a buffer sitting in front of an int price field, letting an overflow set a negative price that makes the order total negative and prints /flag.