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DEF CON 8 - Ghandi - Dot-Com Smashing: Buffer Overflows on the SPARC

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Published on Feb 25, 2014

Ghandi - Dot-Com Smashing: Buffer Overflows on the SPARC

The talk/demonstration is intended for audiences familiar with assembly language and/or stack-based buffer overflows on other architectures (most probably Intel).

The topics aren't really anything new, I would just like to present them with the focus on a different processor/paradigm than Intel to better define the concepts in use. I will be covering SPARC assembly language on a fairly low level.

- Introduction to SPARC assembly
- RISC, LOAD/STORE architecture
- Register windows, Allocating space on the stack
- SPARC subroutine calling conventions, How the code we're attacking will look
- Leaf procedure optimization, How to write optimized assembly
- Unix system calls from assembly language, Overview of traps
- Hand assembling instructions, Conversion to hex, Testing hex-encoded instructions in C __asm__ blocks

- Using GDB (Gnu Debugger) and ADB (Absolute Debugger), Disassembling compiled code, assembling instructions to hexadecimal (faster than by hand), Patching executables, Examining the stack of a running process, Altering the stack/return address

- Hand-crafting shellcode, Basics, Basic shellcode, Intermediate shellcode, Advanced shellcode
- Delivering the payload
- Bonus topics (time permitting)

ghandi is a a Computer Science student beginning work on distributed, interactive environments (ala FreeNet or Stephenson's Metaverse) for an departmental honors project. I also work as a System Administrator at a web startup managing Sun clusters, FreeBSD servers, and Linux workstations.

DEF CON 8.0 was held July 28th - 30th, 2000, in Las Vegas, Nevada USA

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