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Integrating Web Application Penetration Testing into Your
Vulnerability Management Program
Rich MogullSecurosis, L.L.C.
ecurosis.com
Top Threats
ClientsideWeb Applications
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Why Web Applications Are Such a Problem
• Rapid development with limited QA
• Eternal beta cycles
• Un(security)trained developers
• New vulnerability classes
• Insecure browsers
• Inherent insecurity of web model
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Major Webapp AttacksBreaking Trust Relationships
Cross Site Scripting
Cross Site Request Forgery
SQL InjectionBrowser Server
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Cross Site Scripting
2) Malicious script stored
Stored
1
2) User follows to
trusted site
3) Malicious script injected
by site
Reflected
1) Malicious URL
23
Victim VictimAttacker Attacker
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Cross Site Request Forgery
Script/link to submit
transaction to trusted site
Malicious transactions
Session 1
Authenticates
Session 2 StealthSession
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SQL Injection
SQL Statement
Statement: “SELECT * FROM users WHERE name = '" + uName + "‘ AND password =
‘” + upass + “’;”
admin‘--
Attack Input
SELECT * FROM users WHERE name = ‘admin’-- "‘ AND password = ‘” + upass
+ “’;”
Executed Statement
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Accidental/Directory Traversal
+ Or - “/” =
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How we used to manage web applications
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Vulnerability Management
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Web Application Security Program Overview
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Application Security Lifecycle
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Development Phases
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Integration
Pla$ormvulns
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Integration
Pla$ormvulns
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Limitations of static analysis/scanning
• Can’t catch everything
• No validation
• No exploitability/Impact
• Miss logic flaws
• Fire and forget
• The bad guys don’t use them
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Best Practices for Web App Pen Testing
• Begun testing in the development process.
• Use a combination of tools and manual process.
• Include traditional pen testing of the underlying platform.
• Perform periodic testing post-deployment, especially as new exploits appear.
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Adapting your program for the long term
• Understand the different requirements of web application vulnerability management.
• Establish web application configuration standards and begin enforcement during development.
• Include code and vulnerability scanning, but you cannot skip penetration testing.
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Integrating Web Application Penetration Testing into Your
Vulnerability Management Program
Rich MogullSecurosis, L.L.C.
http://securosis.comrmogull@securosis.com
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