~/talk

wintln!(): teaching an ELF to uwu!!

Talkat !!Con 2021 · 2021-05-15..05-22· [rust]
name:Jade Fink
links:none on file
slides:none on file

The prototype inserts itself into the process with a single function call by overwriting the GOT relocation so all write and println output passes through a wrapper that calls the original via a stored pointer. It discovers addresses with gdb and readelf to find offsets, is written in Rust and uses mem::transmute to make a function pointer, and fixes an initial segfault by making the relocation page writable with mprotect the page. The pointaland crate is a minimal working prototype that uwuifies stdout.

AI-written summary · about

  1. 0:00Start
  2. 2:46Dynamic Loader
  3. 6:16Mem Transmute
  4. 7:07Segmentation Fault
  5. 8:52Layout Randomization
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