File: 1042.txt

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Rule:

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Sid:
1042

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Summary:
This event is generated when an attempt is made to craft a URL
containing the text 'Translate: f' in an attempt to view file source code.

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Impact:
Intelligence gathering.  This attack may permit disclosure of the source
code of files not normally available for viewing.

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Detailed Information:
Microsoft Internet Information Services (IIS) 5.0 contains scripting
engines to support various advanced files types such as .ASP and .HTR
files.  This permits the execution of server-side processing.  IIS
determines which scripting engine is appropriate to use 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 the referenced file to the browser.

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Affected Systems:
	Microsoft IIS 5.0

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Attack Scenarios:
An attacker can craft a URL to include the 'Translate: f' and followed
by a '/' to disclose source code on the vulnerable server. 

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Ease of Attack:
Simple.  Attack scripts are freely available.

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False Positives:
Some Microsoft applications make use of the 'Translate: f' header and
may cause this rule to generate an event. These include applications that use WebDAV
for publishing content on a webserver such as Microsoft Outlook Web Access (OWA)

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False Negatives:
None Known.

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Corrective Action:
Apply the appropriate vendor supplied patch.

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Contributors:
Original rule writer kinch@visto.com 
Modified by Brian Caswell <bmc@sourcefire.com>
Sourcefire Research Team
Judy Novak <judy.novak@sourcefire.com>
False positive information contributed by Javier Fernandez-Sanguino

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Additional References:

Microsoft
http://www.microsoft.com/technet/security/bulletin/MS00-058.asp

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