$ cat writeup.md…
$ cat writeup.md…
rev_kids20
Task: 32-bit non-stripped ELF builds a linked list from 47 global node structs in .data and only prints an XOR checksum of the chars, never the flag. Solution: parse ELF section headers to map vaddr->file offset, walk the next-pointer chain from the head node, take even-walk-position chars and reverse them to recover the flag.
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