Class DefaultHttpFirewall

  • All Implemented Interfaces:

    public class DefaultHttpFirewall
    extends java.lang.Object
    implements HttpFirewall

    User's should consider using StrictHttpFirewall because rather than trying to sanitize a malicious URL it rejects the malicious URL providing better security guarantees.

    Default implementation which wraps requests in order to provide consistent values of the servletPath and pathInfo, which do not contain path parameters (as defined in RFC 2396). Different servlet containers interpret the servlet spec differently as to how path parameters are treated and it is possible they might be added in order to bypass particular security constraints. When using this implementation, they will be removed for all requests as the request passes through the security filter chain. Note that this means that any segments in the decoded path which contain a semi-colon, will have the part following the semi-colon removed for request matching. Your application should not contain any valid paths which contain semi-colons.

    If any un-normalized paths are found (containing directory-traversal character sequences), the request will be rejected immediately. Most containers normalize the paths before performing the servlet-mapping, but again this is not guaranteed by the servlet spec.

    See Also:
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      FirewalledRequest getFirewalledRequest​(javax.servlet.http.HttpServletRequest request)
      Provides the request object which will be passed through the filter chain.
      javax.servlet.http.HttpServletResponse getFirewalledResponse​(javax.servlet.http.HttpServletResponse response)
      Provides the response which will be passed through the filter chain.
      void setAllowUrlEncodedSlash​(boolean allowUrlEncodedSlash)
      Sets if the application should allow a URL encoded slash character.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • DefaultHttpFirewall

        public DefaultHttpFirewall()
    • Method Detail

      • getFirewalledResponse

        public javax.servlet.http.HttpServletResponse getFirewalledResponse​(javax.servlet.http.HttpServletResponse response)
        Description copied from interface: HttpFirewall
        Provides the response which will be passed through the filter chain.
        Specified by:
        getFirewalledResponse in interface HttpFirewall
        response - the original response
        either the original response or a replacement/wrapper.
      • setAllowUrlEncodedSlash

        public void setAllowUrlEncodedSlash​(boolean allowUrlEncodedSlash)

        Sets if the application should allow a URL encoded slash character.

        If true (default is false), a URL encoded slash will be allowed in the URL. Allowing encoded slashes can cause security vulnerabilities in some situations depending on how the container constructs the HttpServletRequest.

        allowUrlEncodedSlash - the new value (default false)