Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Glitching Ruby Script

Avatar for Urabe Shyouhei Urabe Shyouhei
September 19, 2017
Technology
870
2

Glitching Ruby Script

A #rubykaigi 2017 Lightning Talk

Avatar for Urabe Shyouhei

Urabe Shyouhei

September 19, 2017

More Decks by Urabe Shyouhei

See All by Urabe Shyouhei
On sending methods
Avatar for Urabe Shyouhei shyouhei
0
720
The send-pop optimisation
Avatar for Urabe Shyouhei shyouhei
2
7.1k
Ruby 2.5 What's New
Avatar for Urabe Shyouhei shyouhei
0
1.3k
Being an Open Source Developer, at work
Avatar for Urabe Shyouhei shyouhei
11
6.9k
Optimizing Ruby
Avatar for Urabe Shyouhei shyouhei
7
2.7k
Ruby and its evaluation
Avatar for Urabe Shyouhei shyouhei
10
3.1k
Deeper look at RFC7159 the JSON
Avatar for Urabe Shyouhei shyouhei
4
1.8k
What's New in Ruby 2.0
Avatar for Urabe Shyouhei shyouhei
71
25k

Other Decks in Technology

See All in Technology
GuardrailからGovernanceへ～AIエージェント運用の次の課題～
Avatar for 吉岡駿 sbspsy
2
280
SRE Lounge Hiroshimaへの招待
Avatar for gr1m0h grimoh
0
640
環境凍結という Toil を倒す -セルフサービス型 Ephemeral テスト環境の 設計と実践
Avatar for Yuji Shirai shirouz
1
2.4k
LLM/Agent評価：トップ営業の発言を「正解」にする 〜暗黙的正解による評価を営業資産に変える〜
Avatar for Hirotaka takkuhiro
1
220
ヘルスケア領域における AI 活用と その安全性担保のための取り組み (Leveraging AI in Healthcare and Our Efforts to Ensure Its Safety) - Google I/O Extended Tokyo 2026, July 11, 2026
Avatar for Akira Tameoka zettaittenani
0
350
【Claude Code】鹿野さんに聞く 私の推しの並行開発環境 大公開 / claude-code-parallel-2026-07-15
Avatar for tonkotsuboy_com tonkotsuboy_com
11
7.4k
はじめてのWDM
Avatar for miyukichi_ospf miyukichi_ospf
1
140
Oracle Exadata Database Service on Cloud@Customer X11M (ExaDB-C@C) サービス概要
Avatar for oracle4engineer oracle4engineer
PRO
2
8.4k
タスクの複雑さでモデルを選ぶ ── Thompson Samplingで動かす“トークン/コスト最適化
Avatar for satoh-y-0323 satohy0323
0
390
証券システムを10年Scalaで作り続けるということ - 関数型まつり2026
Avatar for krrrr38 krrrr38
3
850
CDKで書くECSのベストプラクティス、 改めて考え直す2026 #cdkconf2026
Avatar for maki makies
0
170
Keeping applications secure by evolving OAuth 2.0 and OpenID Connect
Avatar for Alexander Schwartz ahus1
PRO
1
160

Featured

See All Featured
Visualization
Avatar for Eitan Lees eitanlees
152
17k
Hiding What from Whom? A Critical Review of the History of Programming languages for Music
Avatar for Tomoya Matsuura tomoyanonymous
3
930
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
Avatar for Tammy Everts tammyeverts
11
970
Navigating Weather and Climate Data
Avatar for Ryan Abernathey rabernat
0
330
Become a Pro
Avatar for Speaker Deck speakerdeck
PRO
31
6k
A Soul's Torment
Avatar for Nat Ma seathinner
6
3.1k
The Hidden Cost of Media on the Web [PixelPalooza 2025]
Avatar for Tammy Everts tammyeverts
2
340
Jamie Indigo - Trashchat’s Guide to Black Boxes: Technical SEO Tactics for LLMs
Avatar for Tech SEO Connect techseoconnect
PRO
0
300
Deep Space Network (abreviated)
Avatar for Tony Rice tonyrice
0
220
Mind Mapping
Avatar for Hélio Medeiros helmedeiros
PRO
1
280
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
Avatar for Rebecca Miller-Webster rmw
35
3.6k
StorybookのUI Testing Handbookを読んだ
Avatar for Shingo Yamazaki zakiyama
31
6.8k

Transcript

  1. Glitching Ruby Script using American Fuzzy Lop @shyouhei

  2. None

  3. In short, AFL is a tool to glitch something.

  4. Why not use it to glitch our ruby script.

  5. Steps:

  6. 1: patch ruby.

  7. None

  8. OK That was too difficult.

  9. Steps revised:

  10. 1: docker pull.

  11. That’s all ;)

  12. None
  13. None

  14. Outputs

  15. None

  16. *OQVU (MJUDIFE

  17. *OQVU (MJUDIFE

  18. *OQVU (MJUDIFE

  19. N o w , R u b y comes with

    many tests.

  20. What if we glitch those tests?

  21. None
  22. None
  23. None
  24. None
  25. None
  26. None
  27. None

  28. It’s fun that AFL automatically finds bugs.

  29. Let AFL work for you today!