Rule: -- Sid: 1016 -- Summary: This event is generated when an attempt is made to craft a URL containing a reference to the "/global.asa" file. -- Impact: Intelligence gathering. This attack may permit disclosure of the source code of global.asa file that is not normally available for viewing. -- Detailed Information: Microsoft Internet Information Services (IIS) 5.0 contains scripting engines to support various advanced files types such as .ASP and .HTR. The scripting engines permit the execution of server-side processing. IIS determines which scripting engine is appropriate depending on the file extension. If an attacker crafts a URL request ending in 'Translate: f' and followed by a slash '/', IIS fails to send the file to the appropriate scripting engine for processing. Instead, it returns the source code of a referenced file, such as global.asa, to the browser. The Nessus vulnerability scanner references the global.asa file in a GET request to determine whether a host is susceptible to this exploit. -- Affected Systems: Microsoft IIS 5.0 -- Attack Scenarios: An attacker can craft a URL that includes the 'Translate: f' followed by a '/' to disclose the source code of a file such as global.asa on the vulnerable server. -- Ease of Attack: Simple. The Nessus vulnerability scanner can test for this exploit. -- False Positives: None Known. -- False Negatives: None Known. -- Corrective Action: Apply the patch referenced in the Microsoft link. -- Contributors: Original rule writer unknown Modified by Brian Caswell <bmc@sourcefire.com> Sourcefire Research Team Judy Novak <judy.novak@sourcefire.com> -- Additional References: Nessus http://cgi.nessus.org/plugins/dump.php3?id=10491 CVE http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0778 Microsoft http://www.microsoft.com/technet/security/bulletin/MS00-058.asp --
