Advisory Details

February 10th, 2009

Microsoft Internet Explorer Malformed CSS Memory Corruption Vulnerability

ZDI-09-012
ZDI-CAN-400

CVE ID CVE-2009-0076
CVSS SCORE
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Internet Explorer
TIPPINGPOINT™ IPS CUSTOMER PROTECTION TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6761. 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 processing, in XHTML strict mode, a CSS stylesheet containing a specific combination of style directives one of which must be a 'zoom'. The fault in processing results in a memory corruption vulnerability which can be leveraged to execute arbitrary code under the context of the current user.

VENDOR RESPONSE Microsoft has issued an update to correct this vulnerability. More details can be found at:
http://www.microsoft.com/technet/security/bulletin/MS09-002.mspx
DISCLOSURE TIMELINE
  • 2008-10-15 - Vulnerability reported to vendor
  • 2009-02-10 - Coordinated public release of advisory
CREDIT Sam Thomas of eshu.co.uk
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