Rule:--Sid:1487--Summary:This event is generated when an attempt is made to request an HTTP-based password change.--Impact:Information gathering/remote access.  Error messages from failed password changes can indicate whether a given account exists on the server.  Successful password changes can allow remote access to the server. --Detailed Information:Microsoft Internet Information Services (IIS) Version 4 supplies a feature to allow users to make remote password changes.  The iisadmpwd directory has several .HTR files that are used to implement the password changes.  An attacker can request a change and use a returned form to supply an account name, existing password, and new password either to brute force changes or discover whether a specific account name exist. --Affected Systems:Microsoft IIS 4.0--Attack Scenarios:An attacker can request password changes to discover existing accounts or brute force password changes.--Ease of Attack:Simple.--False Positives:None Known.--False Negatives:None Known.--Corrective Action:Remove the IISADMPWD virtual directory to disable remote password changes.Consider running the IIS Lockdown Tool to disable HTR functionality.--Contributors:Original rule writer unknownModified by Brian Caswell <bmc@sourcefire.com>Sourcefire Vulnerability Research TeamJudy Novak <judy.novak@sourcefire.com>--Additional References:CVEhttp://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-1999-0407--