Here is Liu Die Yu's post to bugtraq explaining this issue.
All mentioned resources can be found at Umbrella.MX.TC
This file is collected and re-edited by Umbrella.MX.TC

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LinkillerJPU:another caller-based authorization(is broken).
("that's all" is end of file if you are in a hurry)

[tested]
Browser Ver
{
MS Internet Explorer: 6.0.2600.0000.xpclnt_qfe.021108-2107;
Encryption: 128-bit;
Patch:; Q810847;
}
(So, it's far from fully patched.)
OS Ver: "Windows XP Cn ver"

[demo]
http://www.safecenter.net/liudieyu/LinkillerJPU/LinkillerJPU-MyPage.HTM
or
http://umbrella.mx.tc
---> LinkillerJPU section
---> LinkillerJPU-MyPage file

[exp]
refer to "Linkiller" at UMBRELLA.MX.TC
progress: i found caller-based authorization is also used when
[WindowObj].location.href="javascript:[JpuScript]"

[how]
when i have a hammer, i search for a nail.

[greetings]

the Pull, dror, guninski, http-equiv, sandblad, greymagic and "Friedrich L.Bauer"(man, for your execellent book).
of course, mom and dad.

best wishes

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from http://Umbrella.MX.TC on http://SafeCenter.NET