| GEN:SID | 1:972 |
| Message | WEB-IIS %2E-asp access |
| Summary | This event is generated when an attempt is made to access an Active Server Page (ASP) .asp file when the period is hex encoded as "%2e".
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| Impact | Intelligence gathering activity. A vulnerability exists that discloses the .asp file contents when it is reference using the "%2e" hex encoding.
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| Detailed Information | Microsoft Internet Information Service (IIS) uses Active Server Page to supply HTML and server-side scripting. ASP files use a .asp extension. When the period of the .asp is hex-encoded with a "%2e" to reference an ASP file, the contents of the file are disclosed.
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| Affected Systems | Hosts running IIS 3.0
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| Attack Scenarios | An attacker can attempt use the hex-encoded reference to the .asp file to see the contents of the file. Sensitive information may by disclosed depending on the selected file.
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| Ease of Attack | Simple.
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| Corrective Action | Upgrade to a more current version of IIS. |
| Additional References | CVE http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-1999-0253
Bugtraq: http://www.securityfocus.com/bid/1814
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| Rule References | bugtraq: 1814
cve: 1999-0253
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