A data source object (DSO) is a Microsoft ActiveX
object embedded within a Web page. It employs a process called data binding, in
which an ActiveX
control communicates directly with another Web page, or with an external XML data
source.
In order to take advantage of DSOs, it is necessary to have Internet Explorer version 4.0 or
later. Web developers commonly create their own DSOs. For example, an animated weather radar image
from the National Hurricane Center can be displayed continuously on the home page of a municipal
civil defense department, without the need for clicking on a link to get to the National Hurricane
Center site.
Data source objects are sometimes used for the purpose of implementing spyware.
This type of intrusion shows up on spyware detection programs as a DSO exploit.
Such spyware can be difficult to eradicate, and if it is successfully removed, it often
returns.
This was last updated in November 2005
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