Microsoft Office OWC10 ActiveX Control Loading and Unloading Heap Corruption Vulnerability

August 11th, 2009
ZDI-09-055 ZDI-CAN-186

CVE ID

CVE-2009-0562

CVSS Score

None None

Affected Vendors

Microsoft

Affected Products

Office Word
Office Excel

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 flaw exists when loading and unloading the vulnerable control (0002E543-0000-0000-C000-000000000046) and results in transfer of control to unallocated memory. This issue can be exploited to execute arbitrary code under the context of the currently logged in user user.

Additional Details

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

  • 2007-03-29 - Vulnerability reported to vendor
  • 2009-08-11 - Coordinated public release of advisory

Credit

Peter Vreugdenhil

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