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
Pwn勉強会
Search
m412u
November 27, 2018
Programming
8
12k
Pwn勉強会
・学内で開催したPwn入門勉強会で使用したスライドです。
m412u
November 27, 2018
Tweet
Share
More Decks by m412u
See All by m412u
slide.pdf
m412u
5
2.8k
学内Pwn勉強会
m412u
4
4.8k
Other Decks in Programming
See All in Programming
Webの外へ飛び出せ NativePHPが切り拓くPHPの未来
takuyakatsusa
2
460
Cursor AI Agentと伴走する アプリケーションの高速リプレイス
daisuketakeda
1
130
童醫院敏捷轉型的實踐經驗
cclai999
0
210
『自分のデータだけ見せたい!』を叶える──Laravel × Casbin で複雑権限をスッキリ解きほぐす 25 分
akitotsukahara
1
600
GraphRAGの仕組みまるわかり
tosuri13
8
510
関数型まつりレポート for JuliaTokai #22
antimon2
0
160
NPOでのDevinの活用
codeforeveryone
0
650
LT 2025-06-30: プロダクトエンジニアの役割
yamamotok
0
660
git worktree × Claude Code × MCP ~生成AI時代の並列開発フロー~
hisuzuya
1
520
技術同人誌をMCP Serverにしてみた
74th
1
510
“いい感じ“な定量評価を求めて - Four Keysとアウトカムの間の探求 -
nealle
0
470
PHP 8.4の新機能「プロパティフック」から学ぶオブジェクト指向設計とリスコフの置換原則
kentaroutakeda
2
700
Featured
See All Featured
What’s in a name? Adding method to the madness
productmarketing
PRO
23
3.5k
Fantastic passwords and where to find them - at NoRuKo
philnash
51
3.3k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
34
3.1k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
10
940
Documentation Writing (for coders)
carmenintech
72
4.9k
It's Worth the Effort
3n
185
28k
Optimizing for Happiness
mojombo
379
70k
Unsuck your backbone
ammeep
671
58k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
53
2.8k
Rails Girls Zürich Keynote
gr2m
94
14k
Speed Design
sergeychernyshev
32
1k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
30
2.1k
Transcript
• 2 2 2 •
• P • 1 1 3 • • F
C 3 E C T
• ( ) ) 4 • 4 )
6 . .
. . 7
8 . .
9 .
0 . 1 0
• fi 2 n g l l h
b3a 1 • ( ./. h 2 • ) • a
• bCFE • iah • T h
• ce L • • • iaf • /0 S ) ( 8 0 2 81 1 . 2 1:
• 8 • 3 1 6 •
4 1
• PU U C U • ( () •
1 PU U • • C C 5
6 1
• s p C • e • c 36
36 ( 2.7 207 217 2 7 254 2 4 253 213 a 9 i8d b 7) P U 4
) ( • CDE • ) • ) S •
)( G E P • ) D • ) G Eeb eb • )( G Eeb eb • ) X DEFBI L D • ) X DEFBI L D • A E • ) 8 D • ) CDE • ) i ) 134 1 42
• 8 57 • 4 1 32 Ø 06
57 • 9 • Ø 06 57 • 9 •
• 2 0 • 2
• 21 • mov eax, 0x0 mov DWORD
PTR [ebp-0x10], eax
( ) • A • 2 A cmp eax, 0x1
cmp DWORD PTR [ebp-0x10], eax
) ( • 3 C 3 2 • jmp 0x08048574
je 0x08048574
( , ) • ))) 4 • ))) 2 4
2 2 ( call printf@plt ret
, ( ) , • • add
eax, edx sub eax, edx
(( ) • lea
ecx, [esp+0x4] lea eax, [ebp-0x18]
( () ( • s • n O P e
• \ • O N 7 d s 7 7 2 • l 79 20 •
( ) • c b 2 • 82 • •
a • a • b c • a
• B : • B P 9 • 12
12 2 • I SL 9 : O • B FH : : EH • B FH : U: EH
•
• U 4 • 1 C 7
4 • I • +
• ) 2 .8 (( 4 2 1
3 ) $ git clone https://github.com/m412u/pwn_study.git $ cd pwn_study/sample
• 9) 4 ( •
• •
$ objdump –d –M intel func
) ( : 5 : 5 : 1
• 2 • 1 • $ gdb –q ./func
d g b 5
• 3 52 2 2
• 2 3 52 gdb-peda$ break *0x08048535 or gdb-peda$ b *0x08048535
gdb-peda$ run or gdb-peda$ r
1 . 2 53 .
• 6 1 • •
6 1 • 5 gdb-peda$ nexti or gdb-peda$ ni gdb-peda$ stepi or gdb-peda$ si
+ mov edx, DWORD PTR [ebp-0x14] 5 3 704 704
+ mov eax, DWORD PTR [ebp-0x18] 0 3 4
+ sub esp, 0x8 4 3 0 5
+ push edx 423 0 56
+ 2 2 2 2 2 2 push eax 534
10 6 6
+ 2 2 2 333 2 2 211110 211110 call
0x080484bb <add> AB AB D 4 8 4 8 5C6
22220 888 22220 22220 push ebp EI EI 4653 B
D AC 1 4
22220 22220 22220 mov ebp, esp CD CD 346 8B
A E 1 5
55553 (0 )0 0 0 ) 55553 55553 ) sub
esp, 0x10 I I P A8 C 426 AB 133 AB D 8E
22220 22220 22220 mov edx, DWORD PTR [ebp+0x8] CD CD
8B A E 1 5 346
833331 8 8 8 8 8 833331 833331 mov eax,
DWORD PTR [ebp+0xc] DE DE A C B 206 I457
+ 533331 5 5 5 5 5 533331 533331 add
eax, edx AB AB E 11 6 CD 8204
8 833331 8 8 8 8 8 833331 833331 mov
DWORD PTR [ebp-0x4], eax DE DE A 9C B 206 I45
7 722220 7 7 7 7 7 722220 722220 mov
eax, DWORD PTR [ebp-0x4] CD CD 8B A E 1 5 34
+ 4 422220 4 4 4 4 4 422220 422220
leave = D mov esp, ebp E pop ebp A A D 5 BC 871 3
+ 7 744442 7 7 7 888 7 7 744442
744442 1 leave = mov esp, ebp pop ebp P P E IC D S A 30 5 S 30 B 22 B
44442 44442 44442 1 ret I X E 308 I
A A IB P I C 57S B D
+ 2 2 2 555 2 2 211110 211110 add
esp, 0x10 I C E 3 X7A 00P 8S 4 8 E DB
gdb-peda$ quit or gdb-peda$ q