Date: Tue, 14 Oct 2008 16:46:51 -0500
From: zdi-disclosures@...m.com
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: ZDI-08-068: Microsoft Office Excel BIFF File
 Format Parsing Stack Overflow Vulnerability

ZDI-08-068: Microsoft Office Excel BIFF File Format Parsing Stack Overflow 
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-08-068

-- CVE ID:
CVE-2008-3471

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Office Excel

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6465. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Microsoft Office Excel. Exploitation
requires that the victim to open the malformed BIFF (.xls) document. 

The specific flaw exists within the parsing of the BIFF file format used
by Microsoft Excel. During the processing of a malformed record,
user-supplied data is copied into a stack-based buffer using a size that
is calculated using contents from the record.

-- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:

http://www.microsoft.com/technet/security/bulletin/MS08-057.mspx

-- Disclosure Timeline:
2008-05-23 - Vulnerability reported to vendor

-- Credit:
This vulnerability was discovered by:
    * wushi & ling of team509

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