Advisory Details

August 14th, 2007

Microsoft Internet Explorer substringData Heap Overflow Vulnerability

ZDI-07-048
ZDI-CAN-096

CVE ID CVE-2007-2223
CVSS SCORE
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 5098. 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 various Microsoft software User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists in the substringData() method available on the TextNode JavaScript object. When specific parameters are passed to the method, an integer overflow occurs causing incorrect memory allocation. If this event occurs after a different ActiveX object has been instantiated, an exploitable condition is created when the ActiveX object is deallocated which can result in the execution of arbitrary code.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
http://www.microsoft.com/technet/security/bulletin/ms07-042.mspx
DISCLOSURE TIMELINE
  • 2006-10-03 - Vulnerability reported to vendor
  • 2007-08-14 - Coordinated public release of advisory
CREDIT Anonymous
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