ZDI-11-194: Microsoft Internet Explorer layout-grid-char style Remote Code Execution Vulnerability

ZDI-11-194: Microsoft Internet Explorer layout-grid-char style Remote Code Execution
Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-194

June 14, 2011

– CVE ID:
CVE-2011-1260

– CVSS:
7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)

– Affected Vendors:
Microsoft

– Affected Products:
Microsoft Internet Explorer 9
Microsoft Internet Explorer 8

– TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11272.
For further product information on the TippingPoint IPS, visit:

http://www.tippingpoint.com

– Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Internet Explorer. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page or open a malicious file.

The specific flaw exists within the way Internet Explorer handles
unusual values for the layout-grid-char style property. Specific values
may result in the destruction of a tree node that is still in use during
the rendering of the HTML page. The resulting use-after-free
vulnerability can be leveraged to achieve remote code execution.

– Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:

http://www.microsoft.com/technet/security/Bulletin/MS11-050.mspx

– Disclosure Timeline:
2011-04-04 - Vulnerability reported to vendor
2011-06-14 - Coordinated public release of advisory

– Credit:
This vulnerability was discovered by:
* Jose A. Vazquez of {http://spa-s3c.blogspot.com}

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