HTTP header injection

HTTP header injection is a general class of web application security vulnerability which occurs when Hypertext Transfer Protocol (HTTP) headers are dynamically generated based on user input. Header injection in HTTP responses can allow for HTTP response splitting and cross-site scripting (XSS) attacks. HTTP header injection is a relatively new area for web-based attacks, and has primarily been pioneered by Amit Klein in his work on request/response smuggling/splitting.

Sources

• HTTP Response Smuggling
• HTTP Request Smuggling
• File Download Injection
• WASC Threat Classification - HTTP Response Smuggling
• WASC Threat Classification - HTTP Response Splitting
• WASC Threat Classification - HTTP Request Smuggling
• [http://projects.webappsec.org/HTTP-Request-Splitting WASC Threat Classification - HTTP Request Splitting

Tools

• Wapiti Open Source Header, XSS, SQL and LDAP injection scanner