Advisory Details

January 21st, 2010

Microsoft Internet Explorer Baseline Tag Rendering Remote Code Execution Vulnerability

ZDI-10-012
ZDI-CAN-502

CVE ID CVE-2010-0246
CVSS SCORE 10.0, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
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 9429. 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 an attacker must coerce a victim to visit a malicious page.

The specific flaw exists due to the application rendering intertwined strike and center tags containing an element that manipulates the font baseline such as 'sub' or 'sup'. When this element pointer is removed the application will later dereference it even though it has been freed. Successful exploitation can lead to arbitrary code execution under the context 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/ms10-002.mspx
DISCLOSURE TIMELINE
  • 2009-07-16 - Vulnerability reported to vendor
  • 2010-01-21 - Coordinated public release of advisory
CREDIT Sam Thomas of eshu.co.uk
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