ZDI-10-012: Microsoft Internet Explorer Baseline Tag Rendering Remote Code Execution Vulnerability

ZDI-10-012: Microsoft Internet Explorer Baseline Tag Rendering Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-012
January 21, 2010

– CVE ID:
CVE-2010-0246

– Affected Vendors:
Microsoft

– Affected Products:
Microsoft Internet Explorer 7
Microsoft Internet Explorer 8

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TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9429.
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– 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 states:
http://www.microsoft.com/technet/security/Bulletin/MS10-jan.mspx

– Disclosure Timeline:
2009-07-16 - Vulnerability reported to vendor
2010-01-21 - Coordinated public release of advisory

– Credit:
This vulnerability was discovered by:
* Sam Thomas of eshu.co.uk

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