Awesome
EkoParty - Advanced Fuzzing Workshop
Next editions
2nd edition -> https://github.com/antonio-morales/Hackfest_Advanced_Fuzzing_Workshop
Slides
Start here -> Workshop Slides
Requirements
All you need for the workshop is:
- A running Linux system with an internet connection
- Latest version of AFL++ installed on the system (https://github.com/AFLplusplus/AFLplusplus#building-and-installing-afl). You can download AFL++ source code at https://github.com/AFLplusplus/AFLplusplus/releases.
Virtual machine
You also can find an .OVF virtual machine with everything already set up for the workshop here
- VM credentials: fuzz/fuzz
After booting the VM, open a terminal and go to
Desktop -> WORKSHOP -> Fuzz 0 -> unrtf
Then, type:
afl-fuzz -i ./tests -o afl-output -- ./bin/unrtf --verbose -P ./lib/unrtf/ @@
If all it's ok, you'll be able to see a lot of AFL crashes :)
Rules
- It's a CTF-style hands-on workshop.
- There will be 3 different challenges. The goal is to find a reproducible bug on each of them.
- We're looking for exploitable vulnerabilities. In order to be the winner of a challenge, you must provide a crash/PoC. "Theoretical bugs" or code warnings are not welcome, sorry.
- Challenges are intended to be solved by fuzzing, but creative approaches will be encouraged.
- During the workshop you will be able to ask me any questions you might have (via a private message). Please don't share solutions while the challenge is live.
- I will give you some hints and tips before and during the challenge.
- After each challenge, I will show my solution and I will explain it to you.
- There may be more than one correct solution.
Awards
The winner of each challenge will receive a coupon to spend in GitHub Shop. Second place will also be awarded.
YOU CAN SEND ME THE CRASHES TO MY TWITTER ACCOUNT @nosoynadiemas
Fuzz Challenge 1 - ESIF (Extremely Stupid Image Format) [40 minutes]
Build:
gcc EkoParty1.c -o EkoParty1 -w -lcrypto -lssl
Run:
./EkoParty1 example.ESIF output.ppm
Fuzz Challenge 2 - Crazy HTTP server [50 minutes]
Build:
gcc EkoParty2.c -o EkoParty2 -w -lz
Run (must be run as root):
./EkoParty2
Fuzz Challenge 3 - Check your grammar
A modified (and vulnerable) UnRTF version
Build:
./configure
make
make install
Run
./unrtf [path]
You can find some examples in the "tests" folder