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

Are you content with our current attacks on Con...

Flatt Security
August 05, 2024
2
170

Are you content with our current attacks on Content-Type?

A presentation for BSides Las Vegas 2024.

Flatt Security

August 05, 2024
Tweet

More Decks by Flatt Security

See All by Flatt Security
開発生産性をむしろ向上させる
セキュリティパートナーの作り方 / Dev Productivity Con 2024
flatt_security
0
850
XSS using dirty Content Type in cloud era
flatt_security
2
12k
「企画力」次第でテックブログのネタは尽きない / How to plan a tech blog
flatt_security
3
510
会社紹介資料 / Culture Deck
flatt_security
0
22k
【2025卒向け】新卒採用・会社説明資料 / Culture Deck for 2025 newgrads
flatt_security
0
1.4k
プロフェッショナルサービス事業部案内 / Professional Services Dept Deck
flatt_security
1
3.7k
スタートアップ・Flatt Securityが技術ブログとオウンドメディアの両方にフルコミットする理由 - はてなブログ DevBlog Meetup #1 LT登壇
flatt_security
0
3.4k
開発者のための GitHub Organization の安全な運用と 継続的なモニタリング
flatt_security
4
9k

Featured

See All Featured
The Illustrated Children's Guide to Kubernetes
chrisshort
47
48k
Reflections from 52 weeks, 52 projects
jeffersonlam
346
20k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
89
16k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
663
120k
Docker and Python
trallard
39
3k
How to name files
jennybc
75
98k
The Invisible Customer
myddelton
119
13k
The Straight Up "How To Draw Better" Workshop
denniskardys
230
130k
Robots, Beer and Maslow
schacon
PRO
157
8.1k
Optimising Largest Contentful Paint
csswizardry
30
2.8k
What’s in a name? Adding method to the madness
productmarketing
PRO
21
3k
How STYLIGHT went responsive
nonsquared
93
5.1k

Transcript

  1. "SFZPVDPOUFOUXJUIPVSDVSSFOU BUUBDLTPO$POUFOU5ZQF  B[BSB !B@[BSB@O FJ !FJ  'MBUU4FDVSJUZJOD

  2. 6OFYQFDUFEQBUIGSPN)551SFTQPOTF  VOFYQFDUFEBUUBDLQBUI

  3. 4FMGJOUSPEVDUJPOFJ  &JKJ.PSJFJ 9!FJ  'MBUU4FDVSJUZJOD .VTDMF#SBJO

  4. /PSJIJEF4BJUPB[BSB 9!B@[BSB@O  'MBUU4FDVSJUZJOD 4FMGJOUSPEVDUJPOB[BSB  IUUQTNJTDB[BSBKQ3&"%.&

  5. 5PQJDT 

  6. 8IBUJT$POUFOU5ZQF  0MEBUUBDLQBUIJO)551SFTQPOTF /FXBUUBDLQBUIJO)551SFTQPOTF #VH#PVOUZQSPHSBNSFTFBSDI 044SFTFBSDI .JUJHBUJPOT 5PQJDT 

  7.  8IBUJT$POUFOU5ZQF 

  8. 8IBUJT$POUFOU5ZQF  

  9. 8IBUJT$POUFOU5ZQF  

  10. 8IBUJT$POUFOU5ZQF  

  11. 8IBUJT$POUFOU5ZQF  

  12. 8IBUJT$POUFOU5ZQF  

  13. 8IBUJT$POUFOU5ZQF  

  14.  0MEBUUBDLQBUIJO)551SFTQPOTF 

  15. 0MEBUUBDLQBUIJO)551SFTQPOTF  

  16. 0MEBUUBDLQBUIJO)551SFTQPOTF  

  17. 0MEBUUBDLQBUIJO)551SFTQPOTF  

  18. 0MEBUUBDLQBUIJO)551SFTQPOTF  

  19. 0MEBUUBDLQBUIJO)551SFTQPOTF   &YUFOTJPO QOHKQH  $POUFOU5ZQF JNBHFQOHJNBHFKQH  .BHJDCZUF

  20. 0MEBUUBDLQBUIJO)551SFTQPOTF   &YUFOTJPO QOHKQH  $POUFOU5ZQF JNBHFQOHJNBHFKQH  .BHJDCZUF

  21. 0MEBUUBDLQBUIJO)551SFTQPOTF  

  22.   /FXBUUBDLQBUIJO)551SFTQPOTF

  23. 8IBUJT0CKFDU4UPSBHF   %BUB .FUBEBUB

  24. 8IBUJT0CKFDU4UPSBHF   %BUB .FUBEBUB $POUFOU5ZQF

  25. /FXBUUBDLQBUIJO)551SFTQPOTF  

  26. /FXBUUBDLQBUIJO)551SFTQPOTF  

  27. /FXBUUBDLQBUIJO)551SFTQPOTF  

  28. /FXBUUBDLQBUIJO)551SFTQPOTF  

  29. /FXBUUBDLQBUIJO)551SFTQPOTF   'PSHPUWBMJEBUJPO

  30. /FXBUUBDLQBUIJO)551SFTQPOTF  

  31. /FXBUUBDLQBUIJO)551SFTQPOTF  

  32.  #VH#PVOUZQSPHSBNSFTFBSDI 

  33. %JTDPWFSZJO#VH#PVOUZQSPHSBN   /PWBMJEBUJPO

  34. %JTDPWFSZJO#VH#PVOUZQSPHSBN   /PUVTJOH4

  35. %JTDPWFSZJO#VH#PVOUZQSPHSBN   "DDVSBUFWBMJEBUJPO

  36.  044SFTFBSDI 

  37.  $PEFTFBSDI 

  38. $PEFTFBSDI  

  39. $PEFTFBSDI  

  40. $PEFTFBSDI   /PWBMJEBUJPOPSMBYWBMJEBUJPO

  41. $PEFTFBSDI   /PWBMJEBUJPOPSMBYWBMJEBUJPO 😨

  42.   /PWBMJEBUJPO

  43.  /PWBMJEBUJPOJO)551SFRVFTU 

  44. /PWBMJEBUJPO   /PWBMJEBUJPO

  45. /PWBMJEBUJPO&YBNQMF  

  46. /PWBMJEBUJPO&YBNQMF   6TFEJSFDUWBMVFT

  47. /PWBMJEBUJPO&YBNQMF  

  48. /PWBMJEBUJPO&YBNQMF   7BMJEBUJPO GSPOUFOEPOMZ

  49. /PWBMJEBUJPO&YBNQMF   6QMPBE UFYUIUNM

  50.  /PWBMJEBUJPOJO)551SFTQPOTF 

  51. /PWBMJEBUJPO   /PWBMJEBUJPO

  52. /PWBMJEBUJPO74$PEF&YUFOTJPO  

  53. /PWBMJEBUJPO74$PEF&YUFOTJPO   (FU UFYUIUNM

  54.   7BMJEBUJPOCZQBTT

  55.  7BMJEBUJPOCZQBTTJO)551SFRVFTU 

  56. 7BMJEBUJPOCZQBTT   -BYWBMJEBUJPO

  57. 7BMJEBUJPOCZQBTT   -BYWBMJEBUJPO

  58. #ZQBTTQBUUFSOT  Code Implementations Bypass Examples startsWith(“image/png”) image/png, text/html endsWith(“image/png”)

    text/html; image/png /^image\/png/ image/png, text/html includes(“image/png”) text/html; image/png

  59. 7BMJEBUJPOCZQBTT$7&  

  60. 7BMJEBUJPOCZQBTT$7&  

  61. 7BMJEBUJPOCZQBTT$7&  

  62. 7BMJEBUJPOCZQBTT$7&  

  63. 7BMJEBUJPOCZQBTT$7&  

  64. 7BMJEBUJPOCZQBTT$7&  

  65. 7BMJEBUJPOCZQBTT$7&  

  66. 7BMJEBUJPOCZQBTT$7&   #ZQBTT JNBHFQOH UFYUIUNM

  67.   7BMJEBUJPOCZQBTTJO)551SFTQPOTF

  68. 7BMJEBUJPOCZQBTT   -BYWBMJEBUJPO

  69. 7BMJEBUJPOCZQBTT   -BYWBMJEBUJPO

  70. 7BMJEBUJPOCZQBTT&MFDUSPO  

  71. 7BMJEBUJPOCZQBTT&MFDUSPO   #ZQBTT JNBHFQOH UFYUIUNM

  72. 7BMJEBUJPOCZQBTT$ISPNF&YUFOTJPO  

  73. 7BMJEBUJPOCZQBTT$ISPNF&YUFOTJPO   #ZQBTT UFYUIUNMQEG

  74.  .JUJHBUJPOT 

  75. 4FDVSJUZNFBTVSFTJOJNQMFNFOUBUJPO   z

  76. 4FDVSJUZNFBTVSFTJOJNQMFNFOUBUJPO   z

  77.  5IBOLZPVWFSZNVDIGPSMJTUFOJOH

  78. 3FGFSFODFT 

  79. ◦ "NB[PO4 ◦ IUUQTBXTBNB[PODPNKQT ◦ #MBDL'BODPOUFOUUZQFSFTFBSDI ◦ IUUQTHJUIVCDPN#MBDL'BODPOUFOUUZQFSFTFBSDICMPC NBTUFS944NE ◦

    $BSSJFSXBWF ◦ IUUQTHJUIVCDPNDBSSJFSXBWFVQMPBEFSDBSSJFSXBWF ◦ $7& ◦ IUUQTHJUIVCDPNDBSSJFSXBWFVQMPBEFSDBSSJFSXBWF TFDVSJUZBEWJTPSJFT()4"HYIYHGRIK 3FGFSFODF 

  80. 23DPEF  IUUQTTQFBLFSEFDLDPNGMBUU@TFDVSJUZBSFZPVDPOUFOUXJUIPVSDVSSFOUBUUBDLTPODPOUFOUUZQF

  81. #ZQBTTUFDIOJRVF   IUUQTCTJEFTUPLZPFOYTTVTJOHEJSUZDPOUFOUUZQFJODMPVEFSB

  82. '"2 

  83. 9445ISFBUT  4UPSFE944

  84. &TTFOUJBM5IJOHT   /PWBMJEBUJPO