MSDN: Security Virtual Labs

Learn security concepts from MSDN security virtual labs for free,

+ MSDN Virtual Lab: Microsoft SDL: Developer Starter Kit: Buffer Overflows
+ MSDN Virtual Lab: Microsoft SDL: Developer Starter Kit: Code Analysis
+ MSDN Virtual Lab: Microsoft SDL: Developer Starter Kit: Compiler Defenses
+ MSDN Virtual Lab: Microsoft SDL: Developer Starter Kit: Cross-Site Scripting Vulnerabilities
+ MSDN Virtual Lab: Microsoft SDL: Developer Starter Kit: Fuzz Testing
+ MSDN Virtual Lab: Microsoft SDL: Developer Starter Kit: Security Code Review
+ MSDN Virtual Lab: Microsoft SDL: Developer Starter Kit: Source Code Annotation Language
+ MSDN Virtual Lab: Microsoft SDL: Developer Starter Kit: SQL Injection Vulnerabilities

Though these labs are specific to Microsoft Technologies, concepts are equally applicable to any programming language.

These are direct links to few security labs only. Find here all Security Virtual Labs.