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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>I was wondering to myself, If I can generate certificates and bump the connection, I can use a 302\308 to redirect all traffic from https to a http(intercepatble) connection.<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>Then on the http interceptor rewrite the request into https.<span lang=HE dir=RTL style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>I have a working setup which uses a redirection "attack" to authenticate users over http+https.<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>Now the issue is that if all browsers will deny a redirection from https to http(a downgrading attack) then the http world would look a bit weird.<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'><br>I was thinking about such a downgrade attack on couple sites but I am unsure how good it will be.<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>I have seen couple years ago that some ISPs used a redirection attack when youtube used plain http, this was in order to allow a "pre-fetch" of a tiny GET request.<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>Now since many others up-graded their security it’s another story.<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'><o:p> </o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>And as an addition I have seen that Microsoft use and "FTP" like transfer protocol in their software.<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>They have a "secured" control channel which has certificates pinning or something else as a safe guard,<br>and in more then one case they use another channel to fetch the request over plain HTTP( when a proxy is defined).<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'><o:p> </o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>Would it be reasonable to write and publish such a tool? Or is it a security risk to publish such a tool to the public?<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'><o:p> </o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'>Eliezer<o:p></o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'><o:p> </o:p></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-family:"Arial Rounded MT Bold","sans-serif"'>----<o:p></o:p></span></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-family:"Arial Rounded MT Bold","sans-serif"'><a href="http://ngtech.co.il/lmgtfy/">Eliezer Croitoru</a><br>Linux System Administrator<br>Mobile: +972-5-28704261<br>Email: eliezer@ngtech.co.il<o:p></o:p></span></p><p class=MsoNormal style='text-align:left;direction:ltr;unicode-bidi:embed'><img border=0 width=183 height=69 id="Picture_x0020_1" src="cid:image003.png@01D1AB1B.90875530"><o:p></o:p></p><p class=MsoNormal dir=RTL><span dir=LTR><o:p> </o:p></span></p></div></body></html>