Rule:

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Sid:
1595

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Summary:
This event is generated when an attempt is made to exploit a buffer overflow vulnerability associated with FrontPage Server Extension software.

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Impact:
Remote access.  This attack may permit exeuction of arbitrary commands on the vulnerable server.

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Detailed Information:
Microsoft FrontPage 97 and 98 Server Extensions are shipped with htimage.exe and imagemap.exe files that provide image-mapping support on the server for legacy browsers.  There is a vulnerability associated with the htimage.exe file because of unchecked buffers that may permit execution of arbitrary code on the vulnerable server. 

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Affected Systems:
Microsoft Exchange Server 5.5 and Microsoft Exchange Server 5.5 SP1, SP2, SP3, SP4

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Attack Scenarios:
An attacker can craft a special URL referencing the htimage.exe file that causes a buffer overflow, allowing execution of arbitrary commands on the vulnerable server.

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Ease of Attack:
Simple.  

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False Positives:
None Known.

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False Negatives:
None Known.

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Corrective Action:
Remove the htimage.exe and imagemap.exe files from the server.

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Contributors:
Original rule writer unknown
Modified by Brian Caswell <bmc@sourcefire.com>
Sourcefire Research Team
Judy Novak <judy.novak@sourcefire.com>

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Additional References:

nessus
http://cgi.nessus.org/plugins/dump.php3?id=10376

CVE
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2000-0256
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2000-0122

Bugtraq
http://www.securityfocus.com/bid/1117

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