Incezt Net Review

The program is dynamically linked, so we can leak a libc address from the GOT. The GOT entry for puts is a good target because it’s already resolved.

$ (printf "echo %7$p\n"; cat) | nc challenge.ctf.com 31137
Welcome to Incezt Net!
> %7$p
Result: 0x7ffff7a5d690

The output is a raw pointer printed by the %p format specifier. The exact position (%7$p) was discovered by trial and error (printing %1$p, %2$p, …) until we landed on a pointer that belongs to the libc region (0x7ffff7…).

Result: Leaked address 0x7ffff7a5d690.

The format string also allows us to write an arbitrary 4‑byte value using %n.
We will overwrite the GOT entry of printf with the address of system. When the program later calls printf, it will actually invoke system. By providing the string "/bin/sh" as the argument to that printf, we’ll get a shell.

The challenge files page contained incezt.tar.gz. After extracting: incezt net

$ file incezt
incezt: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked,
        interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, stripped

The binary is stripped, which makes reverse‑engineering a bit harder, but not impossible.

| Year | Milestone | Key Players | |------|-----------|--------------| | 2022 | A cryptic GitHub repo appears under the handle incezt‑dev, containing a lightweight “mesh‑core” written in Rust. | A handful of ex‑Signal engineers, a few university researchers, and an anonymous “QuantumFox”. | | 2023 | First field trial in the rural valleys of the Carpathians, where cellular coverage is spotty. | Local NGOs, hobbyist radio operators, and a network of solar‑powered micro‑nodes. | | 2024 | The “Incezt Protocol v0.7” is released, introducing Proof‑of‑Connectivity (PoC), a reputation system that rewards nodes for uptime and data integrity. | Early adopters include privacy‑focused journalists and activist collectives. | | 2025 | Integration with Quantum‑Secure Key Exchange (Q‑SKE), making the network resistant to future quantum attacks. | Collaboration with the European Quantum Initiative. | | 2026 | First public “Incezt City” demo in Reykjavik, where municipal Wi‑Fi, IoT sensors, and citizen devices operate on a shared, self‑optimising layer. | City council, local startups, and the Open‑Incezt Foundation. | The program is dynamically linked, so we can

The story is still unfolding, but the pattern is clear: the Incezt Net grew out of necessity (reliable communication in underserved regions), idealism (privacy and net‑neutrality), and technical curiosity (pushing the limits of mesh networking).