ZDI-09-056: Microsoft Office OWC10.Spreadsheet ActiveX BorderAround() Heap Corruption Vulnerability

[ZDI Disclosures <zdi-disclosures@xxxxxxxxxxxxxxxx>]

ZDI-09-056: Microsoft Office OWC10.Spreadsheet ActiveX BorderAround() Heap
Corruption Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-056
August 11, 2009

-- CVE ID:
CVE-2009-2496

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Office Word
Microsoft Office Excel

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 8298.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows attackers to execute arbitrary code on
vulnerable installations of Microsoft Office. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page.

The specific vulnerability exists in the OWC10.Spreadsheet.10 ActiveX
control installed by Microsoft Office. By accessing specific methods in
a certain order heap corruption occurs leading to remote code execution.
If exploited, complete control of the affected system can be achieved
under the rights of the currently logged in user.

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

http://www.microsoft.com/technet/security/bulletin/MS09-043.mspx

-- Disclosure Timeline:
2007-12-11 - Vulnerability reported to vendor
2009-08-11 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Peter Vreugdenhil

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