Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
MediaTek Fuzzing Workshop
Search
yuawn
November 26, 2021
Education
2
1k
MediaTek Fuzzing Workshop
MediaTek Fuzzing Workshop in HITCON 2021
yuawn
November 26, 2021
Tweet
Share
More Decks by yuawn
See All by yuawn
Kernel Exploitation
yuawn
4
3k
Heap Exploitation
yuawn
2
1.3k
Binary Exploitation
yuawn
2
1.3k
Binary Exploitation - Basic
yuawn
2
2.8k
HITCON Badge 2019 - MCU ARM TrustZone Challenge
yuawn
2
360
Other Decks in Education
See All in Education
Droid Knights 2024 Accessibility in Android
nanamare
0
310
英語学習から海外発表までの流れ
yasulab
18
4.1k
🎓 ChatGPT を組み込んだ24時間TA : 教育現場における LLM 活用の課題と改善
yasslab
PRO
0
760
2024年度春学期 統計学 第11回 分布の「型」を考える ー 確率分布モデルと正規分布 (2024. 6. 20)
akiraasano
PRO
0
120
AGU情報社会論 2024 #06 "CC BY ND 改変禁止"
fullfull
0
120
困ったときのガイドライン / We Support You in Any Situation
yasulab
2
3.7k
アイスブレイク:自己紹介ポーカーワークショップ(KAG版)
junki
2
310
Course Review - Lecture 12 - Next Generation User Interfaces (4018166FNR)
signer
PRO
0
1.5k
2024年度春学期 統計学 第9回 確からしさを記述する ー 確率 (2024. 6. 6)
akiraasano
PRO
0
140
Прием на целевое обучение
pnuslide
0
6.7k
2024年度 サイバーエージェント新卒社内研修の「データモデリング」の資料公開
chiba_katsu
2
3.9k
week6@tcue2024
nonxxxizm
0
610
Featured
See All Featured
Building Flexible Design Systems
yeseniaperezcruz
325
38k
Designing Experiences People Love
moore
138
23k
Web Components: a chance to create the future
zenorocha
308
42k
5 minutes of I Can Smell Your CMS
philhawksworth
202
19k
Art, The Web, and Tiny UX
lynnandtonic
294
20k
The Cult of Friendly URLs
andyhume
76
6k
It's Worth the Effort
3n
182
27k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
1
48
XXLCSS - How to scale CSS and keep your sanity
sugarenia
246
1.3M
A better future with KSS
kneath
235
17k
Faster Mobile Websites
deanohume
304
30k
Product Roadmaps are Hard
iamctodd
PRO
48
10k
Transcript
Building a Secure World Fuzzing 101 yuawn
Outline • Product Security • Fuzz testing • Fuzzing Lab
• AFL++ • Binary instrumentation - LLVM Pass
Product Security
Product Security - smart phone • Privacy • Photo, video,
voice, SMS, notes, documents … • Credential • private keys, MFA, fi ngerprint, facial ID … • Wallet • credit cards, bank service, electronic payment …
Product Security • 5G, IoT, intelligent vehicles, e-health, metaverse (VR,
AR) • ⾞⽤晶片、航空、醫療儀器、穿戴裝置 • Cybersecurity risk
Product Security • 國安 • ⼈類安全的未來
產品安全 是世界安全的第⼀線
Fuzz Testing
Fuzz Testing • Fuzzing • Automated software testing technique •
bug fi nding • Fuzzer • Repeatedly provides randomly generated inputs to the program and checks the execution result.
Fuzz Testing run with program execution result crash Found bugs!
crash PoC inputs
Fuzz Testing • Black-box • binary only • Grey-box •
utilize some program information to guide fuzzing • White-box • get a full picture of program • e.g., symbolic execution
Fuzz Testing • Black-box • binary only • Grey-box •
utilize some program information to guide fuzzing • White-box • get a full picture of program • e.g., symbolic execution
Coverage-Guided Fuzzing
Coverage-Guided Fuzzing • coverage metric • compute from program information
• utilize coverage information to guide fuzzer increasing coverage percentage
Coverage-Guided Fuzzing seed pool select a seed mutation mutated seed
run with instrumented binary execution result crash Found bugs! crash PoC exit normally new coverage? Yes save to seed pool No
Coverage-Guided Fuzzing seed pool select a seed mutation mutated seed
run with instrumented binary execution result crash Found bugs! crash PoC exit normally new coverage? Yes save to seed pool No
Coverage-Guided Fuzzing seed pool select a seed mutation mutated seed
run with instrumented binary execution result crash Found bugs! crash PoC exit normally new coverage? Yes save to seed pool No
Coverage-Guided Fuzzing • Coverage metric • code coverage • Capture
program information • binary instrumentation • emulator • qemu, angr, qiling
Binary Instrumentation
Binary Instrumentation • Insert additional code into binary • Insert
assembly • vanilla AFL • LLVM Pass - LLVM IR • AFL++ • LTO (Link Time Optimization)
Code Coverage
Code Coverage • coverage of code region • basic block
• edge • Insert additional code at entries of code regions • code coverage -> bug coverage
Code Coverage basic block 1 basic block 2 basic block
3
Code Coverage basic block 1 basic block 2 basic block
3 instrumentation instrumentation instrumentation
Code Coverage basic block 1 basic block 2 basic block
3 instrumentation instrumentation instrumentation 0 0 0 0 0 0 0 0 0 0 bitmap
Code Coverage basic block 1 basic block 2 basic block
3 instrumentation instrumentation instrumentation 0 0 0 0 0 0 0 0 0 0 bitmap
Code Coverage basic block 1 basic block 2 basic block
3 instrumentation instrumentation instrumentation 0 0 1 0 0 0 0 0 1 0 bitmap
Coverage-Guided Fuzzing seed pool select a seed mutation mutated seed
run with instrumented binary execution result crash Found bugs! crash PoC exit normally new coverage? Yes save to seed pool No
Sanitizer
Sanitizer • bug detection • binary instrumentation • overhead •
false-negative bugs
Sanitizer • AddressSanitizers (ASAN) • https://github.com/google/sanitizers • https://www.usenix.org/system/ fi les/conference/atc12/atc12-
fi nal39.pdf • Unde fi ned Behavior Sanitizer (UBSAN) • MemorySanitizer (MSAN) • Leak-checker Sanitizer (LSAN)
Sanitizer - ASAN • heap, stack, global-bu ff er over
fl ow • UAF - use after free • shadow memory • red zone buffer red zone red zone buffer
Coverage-Guided Fuzzers
AFL • american fuzzy lop • https://lcamtuf.coredump.cx/a fl / •
https://github.com/google/AFL
AFL++ • https://github.com/AFLplusplus/AFLplusplus • AFL++ is a superior fork to
Google's AFL - more speed, more and better mutations, more and better instrumentation, custom module support, etc. • cmplog: REDQUEEN • power schedule: AFLFast
AFL++
libfuzzer • LLVM • clang • https://llvm.org/docs/LibFuzzer.html • in-process fuzzing
• fuzzing harness
syzkaller • kernel fuzzer • https://github.com/google/syzkaller
Fuzzing Research
Fuzzing • seed scheduling • AFLFast: Coverage-based Greybox Fuzzing as
Markov Chain (CCS 2016) • MOPT: Optimize Mutation Scheduling for Fuzzers (USENIX 2019) • seed selection • seed corpus optimization • corpus minimization: OptiMin (ISSTA 2021) • initial seed selection • Seed Selection for Successful Fuzzing (ISSTA 2021)
Fuzzing - mutation • FairFuzz: A Targeted Mutation Strategy for
Increasing Greybox Fuzz Testing Coverage (ASE 2018) • REDQUEEN: Fuzzing with Input-to-State Correspondence (NDSS2019) • GREYONE Data Flow Sensitive Fuzzing (USENIX 2020)
Fuzzing - Directed Grey-box Fuzzing • AFLGo: Directed Greybox Fuzzing
(CCS 2017) • Hawkeye: Towards a Desired Directed Grey-box Fuzzer (CCS 2018) • SAVIOR: Towards Bug-Driven Hybrid Testing (S&P 2020) • ParmeSan: Sanitizer-guided Greybox Fuzzing (USENIX 2020) • Constraint-guided Directed Greybox Fuzzing (USENIX 2021)
Fuzzing - research topic • data fl aw analysis (DFA)
• taint analysis • binary instrumentation • binary only • dynamic instrumentation • parallel fuzzing • ensemble fuzzing • EnFuzz: Ensemble Fuzzing with Seed Synchronization among Diverse Fuzzers (USENIX 2019)
Fuzzing - research topic • symbolic execution • KLEESPECTRE: Detecting
Information Leakage through Speculative Cache Attacks via Symbolic Execution • concolic execution • hybrid fuzzing • PANGOLIN: Incremental Hybrid Fuzzing with Polyhedral Path Abstraction (S&P 2020)
Fuzz Something!
Fuzzing lab • https://github.com/yuawn/Mediatek-Fuzzing-Workshop
AFL++ • a fl -fuzz -i input -o output --
./binary • a fl -fuzz -i input -o output -- ./binary -a -b • a fl -fuzz -i input -o output -- ./binary -f @@
AFL++ - dictionary • a fl -fuzz -i input -o
output -x xml.dict -- ./binary
AFL++ - parallel fuzzing • a fl -fuzz -M main
-i input -o sync_dir -- ./binary • a fl -fuzz -S fuzzer2 -i input -o sync_dir -- ./binary • a fl -fuzz -S fuzzer3 -i input -o sync_dir -- ./binary
Summary
Summary • Fuzzing is a novel security testing technique •
Product Security awareness • Building a secure world
Thanks!