Linux aarch64 static ELF - 3043 bytes

DavidBuchanan314 commented 3 months ago
---BEGIN BGGP5---
Submit Date: 2024-09-06
BGGP Challenge Number: 5
Author: retr0id
Contact Info (Optional): 
Online Presence (Website/Social Media): 
Target File Type: Linux aarch64 static ELF
File Size: 3043
SHA256 Hash: b01a2f924b58a8b73b730d3b00479c62f37dd1ba4f17464843ef605b2a2b7ce2
Target Environment (How do we run the file?): sudo modprobe tls; ./kurl https://binary.golf/5/5
Any additional info?: It won't work under qemu-user, needs a "real" aarch64 system with a modern kernel (for ktls, crypto).
There are no userland dependencies, but cryptography happens in the kernel.
Link to PoC video, screenshot, or console output, if any: 
Link to writeup, if any: Dev log at https://github.com/DavidBuchanan314/kurl (I might do a better writeup in the near future but I'm hoping that README already qualifies for points ;)
File contents (base64 encoded please):
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---END BGGP5---
neuschaefer commented 3 months ago
big kudos for going the KTLS route! i considered it too, and ended up spawning the openssl utility instead
DavidBuchanan314 commented 3 weeks ago
Turns out I didn't get around to golfing it any further, so this is my final submission. Time to remove the WIP label!
binarygolf / BGGP

Linux aarch64 static ELF - 3043 bytes #51
