Advisory Details

August 5th, 2009

Microsoft Internet Explorer CSS Behavior Memory Corruption Vulnerability

ZDI-09-048
ZDI-CAN-484

CVE ID CVE-2009-1919
CVSS SCORE
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Internet Explorer
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8359, 8361. 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 when accessing embedded style sheets within an HTML file. When modifying the properties of rules defined in the style the behavior element is improperly processed resulting in a memory corruption which can be further leveraged to execute arbitrary code 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/MS09-034.mspx
DISCLOSURE TIMELINE
  • 2009-04-28 - Vulnerability reported to vendor
  • 2009-08-05 - Coordinated public release of advisory
CREDIT Peter Vreugdenhil
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