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Question feed. If you set the seventh character to 2 , anonymous clients can perform any operation that is permitted by the access control list ACL , as can Windows based domain controllers. If the attribute is already set, do not modify any characters in the DsHeuristics string other than the seventh character. If the value is not set, make sure that you provide the leading zeros up to the seventh character. Also, you can use Adsiedit. Only selected attributes are shown. Note the leading zeros.
Both services will appear to accept a blank password for any users when performing a simple bind. While behind the scenes, that's not what is happening, if your application doesn't check for and reject a logon attempt with the blank password itself, it might incorrectly assume a successful authentication against LDAP.
This post details how I came to learn about this behaviour, how wide spread the problem is, and what can be done about it. The discovery A few weeks ago, I was at my desk, enjoying my lunch, when I received a call from a customer in a panic. He told me that our AD LDS server was allowing people to access his application without typing in a password. I assumed he was talking about anonymous binds binding with no username and password and informed him that it's a normal LDAP thing, and it just means his application probably hadn't been coded properly.
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