Rule: 

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Sid: 
7024

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Summary: 
This event is generated when an attempt is made to exploit a known vulnerability in Microsoft Excel.

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Impact: 
Serious. Code execution is possible.

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Detailed Information:
Microsoft Excel with the Multilingual User Interface with Asian Languages option installed is vulnerable to a buffer overflow.  The flaw is due to insufficient checks when handling the Style section of the document.  An attacker can leverage this vulnerability by enticing a user to open a crafted Excel document and execute arbitrary code.

This rule generates an event when an attempt is made to exploit this vulnerability.

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Affected Systems:
Microsoft Office 2003

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Attack Scenarios: 
An attacker would need to supply a specially crafted document to be opened by the user.

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Ease of Attack: 
Simple.

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False Positives:
THIS RULE IS LIKELY TO GENERATE FALSE POSITIVE EVENTS AND SHOULD NOT BE USED TO BLOCK IN INLINE MODE

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False Negatives:
None known.

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Corrective Action: 
Upgrade to the latest non-affected version of the product.

Apply the appropriate vendor supplied patches.

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Contributors:
Sourcefire Vulnerability Research Team
Kevin Shivers <kevin.shivers@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

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