ZDI-07-026: Microsoft Excel BIFF File Format Named Graph Record Parsing
            Stack Overflow Vulnerability
https://www.zerodayinitiative.com/advisories/ZDI-07-026.html
May  8, 2007

-- CVE ID:
CVE-2007-0215

-- Affected Vendor:
Microsoft

-- Affected Products:
Office Excel 2000
Office Excel 2002
Office Excel 2003

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since May  8, 2007 by Digital Vaccine protection
filter ID 5330. For further product information on the TippingPoint IPS:

    https://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 attacker coerce the target into opening a malicious
.XLS file.

The specific flaw exists within the parsing of the BIFF file format
used by Microsoft Excel. During the processing of a malformed Named
Graph record, user-supplied data may be copied to the stack unchecked
thereby leading to an exploitable stack-based buffer overflow.

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

    https://www.microsoft.com/technet/security/bulletin/ms07-023.mspx

-- Disclosure Timeline:
2006.11.16 - Vulnerability reported to vendor
2007.05.08 - Digital Vaccine released to TippingPoint customers
2007.05.08 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by Manuel Santamarina Suarez.

-- About the Zero Day Initiative (ZDI):
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(ZDI) represents a best-of-breed model for rewarding security
researchers for responsibly disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    https://www.zerodayinitiative.com

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