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Internet Explorer and Opera JavaScript Ghost Vulnerability
------------------------------------------------------------------------
SUMMARY
A bug in Internet Explorer and Opera's processing of JavaScript allows
attackers to run a JavaScript on the computer of the surfer, while the
making its source code inaccessible to the user.
DETAILS
Vulnerable Systems:
* Internet Explorer 6 SP2
* Opera version 7.54
* Opera version 8
Normally the code of an HTML page and all of it's JavaScript code is
visible to the user if the user asks for the source code of the HTML page.
Exploit:
< h1>Something < i>before</i></h1>
< br> the < b>JavaScript</b>... Blablalbla
< script type="text/jscript">
function init() {
document.write("The time is now: " + Date() );
}
window.onload = init;
</script>
And < u>something</u> after the < b>JavaScript</b>... Blablablablabla
If the user browser is vulnerable for this vulnerability, the result will
be "The time is now xxx" , where xxx is the date and time. While the user
will not see the "Something before the JavaScript" and also not the "and
something after the JavaScript".
Disclosure Timeline:
07-06-2005 - The bug was reported to the vendor
08-06-2005 - The bug was reported to the vendor
ADDITIONAL INFORMATION
The information has been provided by <mailto:development@seniorennet.be>
Pascal Vyncke.
The original article can be found at:
<http://research.seniorennet.be/Techresearch/Javascript_security_flaw_bug_ie_6/security_flaw_bug_javascript_ie_6_internet_explorer.php>
Security flaw bug javascript ie 6 internet explorer
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