Fsxwx [exclusive] Jun 2026

We can satisfy the permission check by creating a temporary file with the required mode:

# ------------------------------------------------------------------ # 2) Build ROP chain # ------------------------------------------------------------------ rop = ROP(libc) rop.execve(libc.search(b'/bin/sh').__next__(), 0, 0) We can satisfy the permission check by creating

The is the only user‑controlled vulnerability. Because the binary runs set‑uid root, we can abuse it to: We can satisfy the permission check by creating

But a more reliable method is to use ’ fmtstr_payload helper, which builds the entire write‑once payload for us. We can satisfy the permission check by creating

The program also contains and no PIE , making it straightforward to craft a ROP chain once we know the base address of libc.

0x7ffff7a5d830