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Transcript of Web Application Security Implementation - © 2007 GIAC Web Application Security Implementation SANS...
Web Application Security Implementation - © 2007 GIAC
Web Application Security Implementation
SANS MSISE GDWPKevin Bong
John BrozyckiJuly 26, 2007
Web Application Security Implementation - © 2007 GIAC
Introduction
• Website vulnerability used to copy customer data to foreign host.
• Senior management to acquire services of penetration team. Not available for immediate needs.
• Post incident,we are tasked with creation of a web application security assessment program, to implement within a few days.
Web Application Security Implementation - © 2007 GIAC
Web Assessment Process
Inventory
Automated Vulnerability Scan
Manual Web Server Audit
Manual Web Application Audit
Conduct Interviews
Report Findings
Web Application Security Implementation - © 2007 GIAC
Web Service Inventory
• Need to know what is legitimate and necessary. (Programs, services, ports)
• Need to know where the data lives and how it is accessed.
• Rate assets (web servers/services) to focus resources and set priorities.
Web Application Security Implementation - © 2007 GIAC
Performing Automated Scans
• Verify the inventory by confirming the existence of services.
• Identify additional, unneeded processes and check for common vulnerabilities and misconfigurations for both the necessary and unnecessary processes and services.
• Quickly identify the low hanging fruit.
Web Application Security Implementation - © 2007 GIAC
Manual Audit of Web Server Security
• Review if best practices are followed– Is defense in depth employed?– Configuration of web server and web
development frameworks– User and service accounts and rights– Error messages, other information
leakage– Do log files store appropriate information?
• Review change processes for ports and services through interviews
Web Application Security Implementation - © 2007 GIAC
Manual Audit of Web Applications
• Based on inventory, focus on potentially vulnerable code
• Specific tests to be performed against each dynamic page
• Interview developers to determine if processes prevent new vulnerabilities
Web Application Security Implementation - © 2007 GIAC
Deliverables for the Senior Management Team
• Reports and recommendations delivered within days.
• Results of inventory, scans, and manual audits used to provide action items that can be given to implementation team.
• Additional recommendations from tiger team to management to minimize reoccurrences.