Hands-On ModSecurity and Logging
A presentation at DevOpsFest in in Kyiv, Ukraine, 02000 by Philipp Krenn
Hands-On ModSecurity and Logging Philipp Krenn @xeraa
Let’s talk about security… @xeraa
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A1:2017-Injection https://www.owasp.org/index.php/ Top_10-2017_Top_10 @xeraa
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A10:2017-Insufficient Logging & Monitoring https://www.owasp.org/index.php/ Top_10-2017_Top_10 @xeraa
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Developer @xeraa
Disclaimer I build highly monitored Hello World apps @xeraa
Hello World of SQL Injection: https://xeraa.wtf @xeraa
https://xeraa.wtf/read.php?id=1 @xeraa
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python sqlmap.py —url “https://xeraa.wtf/read.php?id=1” -purge @xeraa
Injection ;INSERT INTO employees (id,name,city,salary) VALUES (4,’new’,’employee’,10000) @xeraa
No Escaping Either ;INSERT INTO employees (id,name,city,salary) VALUES (5,’<script>alert(“hello”)</script>’,’evil’,0) @xeraa
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What’s going on in our app? @xeraa
DELETE or DROP? @xeraa
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ModSecurity is an open source, cross-platform web application firewall (WAF) module. Known as the “Swiss Army Knife” of WAFs, it enables web application defenders to gain visibility into HTTP(S) traffic and provides a power rules language and API to implement advanced protections. @xeraa
OWASP ModSecurity Core Rule Set (CRS) Version 3 • HTTP Protocol Protection • Real-time Blacklist Lookups • HTTP Denial of Service Protections • Generic Web Attack Protection • Error Detection and Hiding @xeraa
Commercial Rules from Trustwave SpiderLabs • Virtual Patching • IP Reputation • Web-based Malware Detection • Webshell / Backdoor Detection • Botnet Attack Detection • HTTP Denial of Service (DoS) Attack Detection @xeraa
Run sqlmap again python sqlmap.py —url “https://xeraa.wtf/read.php:8080? id=1” —purge @xeraa
Custom Rule SecRule REQUEST_FILENAME “form.php” “id:’400001’,chain,deny,log,msg:’Spam detected’” SecRule REQUEST_METHOD “POST” chain SecRule REQUEST_BODY “@rx (?i:(pills|insurance|rolex))” @xeraa
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Conclusion @xeraa
Examples https://github.com/xeraa/mod_security-log @xeraa
Code Logging ModSecurity @xeraa
Questions? Philipp Krenn @xeraa @xeraa
This talk combines two of the OWASP top ten security risks:
- Injections (A1:2017): We are using a simple application that is exploitable by an injection and will then secure it with ModSecurity.
- Insufficient Logging & Monitoring (A10:2017): We are logging and monitoring the application both with and without ModSecurity with the open source Elastic Stack.
To make it more interactive the audience has to do the injections, which we are then live monitoring and mitigating with ModSecurity.
Video
Resources
The following resources were mentioned during the presentation or are useful additional information.
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GitHub Demo Code
Fighting SQL injections and insufficient logging.
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