VULHUB ™

Introduction: Although IIS5 is very old, finding one is not impossible! Therefore, I want to introduce a technique to bypass the IIS authentication methods on a directory. This vulnerability is because of using Alternate Data Stream to open a protected folder. All of IIS authentication methods can be circumvented. In this technique, we can add a “:$i30:$INDEX_ALLOCATION” to a directory name to bypass the authentication. It is possible to run “secretfile.asp” by using: “/AuthNeeded:$i30:$INDEX_ALLOCATION/secretfile.asp” Instead of: “/AuthNeeded/secretfile.asp” Microsoft IIS 5.1 update to IIS 6.0 and Or higher Microsoft --------- http://www.microsoft.com/

Introduction: Although IIS5 is very old, finding one is not impossible! Therefore, I want to introduce a technique to bypass the IIS authentication methods on a directory. This vulnerability is because of using Alternate Data Stream to open a protected folder. All of IIS authentication methods can be circumvented. In this technique, we can add a “:$i30:$INDEX_ALLOCATION” to a directory name to bypass the authentication. It is possible to run “secretfile.asp” by using: “/AuthNeeded:$i30:$INDEX_ALLOCATION/secretfile.asp” Instead of: “/AuthNeeded/secretfile.asp” Microsoft IIS 5.1 update to IIS 6.0 and Or higher Microsoft --------- http://www.microsoft.com/