MY STORY
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Cass closed her eyes. The device felt warm in her hand. "Public feed," she said finally. "But not raw. We need context. People need to see who made the choice, and why." She imagined the city like one of the old layered maps, transparent vellum stacked: show the hand that drew the line, and then show the line again.
Inside the container we have pwntools ( python3 -c "import pwn" works) and a non‑root user ctf with permission to execute the set‑uid binary.
Because the binary is PIE, we need a address leak. The only leakage point is a debug output that prints the result of the calculation as a signed 64‑bit integer . By carefully choosing the operands we can force an integer overflow that makes the program print a value derived from a memory address on the stack (the return address of main ), which we then use to compute the base of the binary and later the address of libc functions.
