Advisory Details

December 8th, 2009

Microsoft Internet Explorer CSS Race Condition Code Execution Vulnerability

ZDI-09-087
ZDI-CAN-541

CVE ID CVE-2009-3673
CVSS SCORE
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Internet Explorer 8
Internet Explorer 7
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9315. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to potentially 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 during a race condition while repetitively clicking between two elements at a fast rate. When clicking back and forth between these two elements a corruption occurs resulting in a call to a dangling pointer which can be further leveraged into code execution via a heap spray. Exploitation of this vulnerability will lead to remote system compromise under the credentials of the currently logged in 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/ms09-072.mspx
DISCLOSURE TIMELINE
  • 2009-07-21 - Vulnerability reported to vendor
  • 2009-12-08 - Coordinated public release of advisory
CREDIT Anonymous
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