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GEN:SID | 1:996 |
Message | WEB-IIS anot.htr access |
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. |
Corrective Action | Remove the IISADMPWD virtual directory to disable remote password changes. Consider running the IIS Lockdown Tool to disable HTR functionality. |
Additional References | CVE http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-1999-0407 Bugtraq http://www.securityfocus.com/bid/2110 |
Rule References | bugtraq: 2110 cve: 1999-0407 |
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DID:299473
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