Advisory Details

October 13th, 2009

Microsoft Internet Explorer writing-mode Memory Corruption Vulnerability

ZDI-09-071
ZDI-CAN-494

CVE ID CVE-2009-2531
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 8654. 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 in that a user must visit a malicious web page.

The specific flaw exists in the parsing of CSS style information. When a writing-mode style is used with a specific combination of HTML tags, memory corruption occurs. Exploitation of this vulnerability will lead to remote system compromise under the credentials of the currently logged in 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/ms09-054.mspx
DISCLOSURE TIMELINE
  • 2009-06-23 - Vulnerability reported to vendor
  • 2009-10-13 - Coordinated public release of advisory
CREDIT Sam Thomas of eshu.co.uk
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