mshtml.dll in Microsoft Internet Explorer 7 and 8 on Windows XP SP3 allows remote attackers to cause a denial of service (application crash) by calling the JavaScript findText method with a crafted Unicode string in the first argument, and only one additional argument, as demonstrated by a second argument of -1.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.