Advisory Details

October 13th, 2009

Microsoft Internet Explorer Event Object Type Double-Free Vulnerability

ZDI-09-070
ZDI-CAN-489

CVE ID CVE-2009-2530
CVSS SCORE
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8653. 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 Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists within the copy constructor for a specific DOM object. When duplicated, more than one reference can be made of anything assigned to it's properties. When the variable/object goes out of scope, these properties will be deallocated twice. This results in a heap corruption which can lead to code execution under the context of the current 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/ms09-054.mspx
DISCLOSURE TIMELINE
  • 2009-06-23 - Vulnerability reported to vendor
  • 2009-10-13 - Coordinated public release of advisory
CREDIT Anonymous
Anonymous
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