1. BAlCCon
1.1. r2wars - battle bots in shared memory
2023-09-10 15:40 - 16:40 Room: Tesla
Running programmes simultaneously in the same memory: what could go wrong? This is about how and then playing with it hands-on. We look at the substructure, build our own small programmes that then try to overwrite each other.
; r2 malloc://1024
[0x00000000]> aei
[0x00000000]> aeim
[0x00000000]> wx e80000000058 @ 0x100
[0x00000000]> aer PC = 0x100
[0x00000000]> aer SP = SP + 0x100
[0x00000000]> aes
[0x00000000]> aerR