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Date: Tue Dec 11 2007 - 15:54:33 CST
ZDI-07-073: Microsoft Internet Explorer setExpression Code Execution
December 11, 2007
-- CVE ID:
-- Affected Vendor:
-- Affected Products:
Internet Explorer 5.01 SP4
Internet Explorer 6
Internet Explorer 7
-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID .
For further product information on the TippingPoint IPS:
-- 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.
The specific flaw exists in the CRecalcProperty function in mshtml.dll.
When rendering HTML after calling the setExpression methods, followed by
a modification of the outerHTML property of a programatically created
element. The vulnerable code dereferences a previously freed memory
location which can be leveraged to execute arbitrary code.
-- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:
-- Disclosure Timeline:
2007.07.20 - Vulnerability reported to vendor
2007.12.11 - Coordinated public release of advisory
This vulnerability was discovered by an anonymous researcher.
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