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ZDI-12-036 : Microsoft Internet Explorer VML CDispScroller Remote Code
Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-036
February 22, 2012

- -- CVE ID:
CVE-2012-0155

- -- CVSS:
7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P

- -- Affected Vendors:

Microsoft



- -- Affected Products:

Microsoft Internet Explorer



- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 12102.
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 Microsoft 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 flaw exists within the handling of VML element positioning. When
appending a VML element to a textArea element a reference to a
cDispScroller object can be improperly freed. The object is can be
reused, and due to this object being freed, a later allocation can be
located in this memory region.  A remote attacker can exploit this
vulnerability to execute arbitrary code under the context of the process.

- -- Vendor Response:

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

http://technet.microsoft.com/en-us/security/bulletin/MS12-010




- -- Disclosure Timeline:
2011-11-29 - Vulnerability reported to vendor

2012-02-22 - Coordinated public release of advisory



- -- Credit:
This vulnerability was discovered by:

* Stephen Fewer of Harmony Security (www.harmonysecurity.com)



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