Advisory Details

October 14th, 2008

Microsoft Office Excel BIFF File Format Parsing Stack Overflow Vulnerability

ZDI-08-068
ZDI-CAN-345

CVE ID CVE-2008-3471
CVSS SCORE
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Office Excel
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6465. For further product information on the TippingPoint IPS: 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.

ADDITIONAL DETAILS 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
  • 2008-10-14 - Coordinated public release of advisory
CREDIT wushi & ling of team509
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