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ZDI-12-201 : Microsoft Office Word PAPX Section Remote Code Execution
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-201
December 21, 2012

- -- CVE ID:
CVE-2012-0182

- -- CVSS:
7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P

- -- Affected Vendors:
Microsoft


- -- Affected Products:
Microsoft Office Word


- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11933.
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 Word. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page or open a malicious file.

The specific flaw exists within how the application parses a PAPX FKP
sections. When parsing a PAPX FKP section, the application will store a
calculation. However, when repairing a damaged document, the application
will explicitly trust this calculation in a loop that is used to index into
an array of objects. This will allow for an out-of-bounds access of an
object which can lead to code execution under the context of the
application.

- -- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More details
can be found at:
http://technet.microsoft.com/en-us/security/bulletin/ms12-064



- -- Disclosure Timeline:
2011-05-25 - Vulnerability reported to vendor
2012-12-21 - Coordinated public release of advisory


- -- Credit:
This vulnerability was discovered by:
* Anonymous


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