TippingPoint Zero Day Initiative
 

Microsoft Office Excel PivotTable Cache Record Parsing Memory Corruption Vulnerability

ZDI-09-082: November 10th, 2009

CVE ID

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9244. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office Excel. User interaction is required to exploit this vulnerability in that the target must open a malicious document.

The specific flaw exists when parsing a document containing a malformed PivotCache Stream. The application will utilize the iCache value of an SXVI record to seek into a list of objects. While setting an attribute of that particular object, the application will corrupt memory which can lead to code execution under the context of the currently logged in user.

Vendor Response

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

Disclosure Timeline

    2009-08-20 - Vulnerability reported to vendor
    2009-11-10 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Anonymous