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TryHackMe PWN101: Stack Buffer Overflow into a Local Variable
How an unbounded gets() call lets input spill out of a 50 byte stack buffer and overwrite the integer the program uses to decide whether you deserve a shell. Static analysis, offset math from the disassembly, local and remote exploitation with pwntools, and why NX, PIE and Full RELRO did nothing to stop it.
—18 min read