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Rule:
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Sid:
1020
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Summary:
This event is generated when an attempt is made to exploit a buffer overflow associated with a file with a .idc extension.
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Impact:
Remote access. This attack may permit the execution of arbitrary commands on the vulnerable server.
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Detailed Information:
Microsoft Internet Information Service (IIS) supports file extensions including .idc that call the ISM.DLL. A buffer overflow vulnerability exists in ISM.DLL code when it receives a malformed request, permitting the execution of arbitrary code.
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Affected Systems:
IIS 4.0 hosts
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Attack Scenarios:
An attacker can send a malformed request containing a file name with an extension of .idc, possibly causing a buffer overflow.
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Ease of Attack:
Simple. Exploit code is freely available.
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False Positives:
None Known.
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False Negatives:
None Known.
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Corrective Action:
Upgrade to a more current version of IIS.
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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:
CVE
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-1999-0874
Bugtraq:
http://www.securityfocus.com/bid/307
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