hack this site basic 10

For this 10th basic mission, Sam has used a more “hidden” approach to authenticate users. since viewing the source is a dead end, I tried another approach which is to view the HTTP request headers using Live HTTP headers which is another, very useful firefox addon (grab it here), I could also have used Tamper data for that. Anyway, after monitoring the headers I’ve found an insteresting thing as shown here:

Live HTTP headers

As you can see, it’s an interesting information that we got here, we know that Sam is using a cookies based authentication method this time. We know this, now what?.

Now we must change the value of the cookie named “level10_authorized” to “yes”, and to do this, you can use raw Javascript or use a firefox addon such as tamper data, firebug,etc…

We will do it in raw JavaScript: while on the 10th mission webpage enter this JavaScript code in the address bar:

javascript:function a(){document.cookie="level10_authorized=no";}a();

Now click on the submit button, Congratz, you’ve completed the 10th mission

Hack This Site basic 9

To solve this challenge you must know Directory traversal, SSI and *nix directory structure. In this mission Sam screwed up somewhere when he was trying to limit the use of SSI to the level 8 only, this is a big spoiler on how you should proceed to achieve this mission, in other words you have to use Sam’s daughter script once again to find the hidden file containing the password.

Back in the previous mission, we know that the file that is supposed to containt our name is stored in this directory “/var/www/hackthissite.org/html/missions/basic/8/tmp/” and we got the directory listing of “/var/www/hackthissite.org/html/missions/basic/8/” with this command <!–#exec cmd=”ls ..”–> where the two dots mean: one level up. What we need to do is to climb another level up (/var/www/hackthissite.org/html/missions/basic/) and list the content of the folder named “9″ (/var/www/hackthissite.org/html/missions/basic/9/)  where the file containing the password is, the SSI command will be “<!–#exec cmd=”ls ../../9/”–>” once you submit this, you will get the name of the file containing the password. Once done, append it to this address “http://www.hackthissite.org/html/missions/basic/9/” (ex: http://www.hackthissite.org/html/missions/basic/9/p91e283zc3.php) and navigate to it, here you got your password .