Full Disclosure mailing list archives
Re: Web 2.0 backdoors made easy with MSIE & XMLHttpRequest
From: Amit Klein <aksecurity () gmail com>
Date: Sun, 04 Feb 2007 07:14:39 +0200
Michal Zalewski wrote:
On Sat, 3 Feb 2007, Michal Zalewski wrote:xmlhttp.open("GET\thttp://dione.ids.pl/\tHTTP/1.0\n\n", "x",true);Funny enough, Paul Szabo was quick to point out that Amit Klein found the same vector that I used here for client-side backdoors in May 2006 (still not patched?! *shrieks in horror*), but for cache poisoning: "IE + some popular forward proxy servers = XSS, defacement (browser cache poisoning)" http://www.securityfocus.com/archive/1/434931 This is getting depressing. May 2006.
Much worse. The basic technique already appeared in two of my previous write-ups: "Exploiting the XmlHttpRequest object in IE - Referrer spoofing, and a lot more..." (September 2005) http://www.securityfocus.com/archive/1/411585 "XS(T) attack variants which can, in some cases, eliminate the need for TRACE </archive/107/308433/30/0/threaded>" (January 2003) http://www.securityfocus.com/archive/107/308433 The 2005 text does briefly mention "Accessing content / web-scanning" (take a look at Notes 1-3). So the problem is much older. Thanks, -Amit _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Web 2.0 backdoors made easy with MSIE & XMLHttpRequest Michal Zalewski (Feb 03)
- Re: Web 2.0 backdoors made easy with MSIE & XMLHttpRequest Michal Zalewski (Feb 03)
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- Re: Web 2.0 backdoors made easy with MSIE & XMLHttpRequest Tyop? (Feb 03)
- Re: Web 2.0 backdoors made easy with MSIE & XMLHttpRequest Michal Zalewski (Feb 03)
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- Fwd: Web 2.0 backdoors made easy with MSIE & XMLHttpRequest Giorgio Fedon (Feb 03)
- Re: Web 2.0 backdoors made easy with MSIE & XMLHttpRequest Michal Zalewski (Feb 03)
- Re: Web 2.0 backdoors made easy with MSIE & XMLHttpRequest James Matthews (Feb 03)
- Re: Web 2.0 backdoors made easy with MSIE & XMLHttpRequest Amit Klein (Feb 04)
- Re: Web 2.0 backdoors made easy with MSIE & XMLHttpRequest Troy Cregger (Feb 05)