[30083] in bugtraq
Re: II-Labs Advisory: Remote code execution in YaBBse 1.5.2 (php version)
daemon@ATHENA.MIT.EDU (ScriptSlave@gmx.net)
Sat May 10 14:55:07 2003
Date: Sat, 10 May 2003 11:36:37 +0200 (MEST)
From: ScriptSlave@gmx.net
To: bugtraq@securityfocus.com
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>SSI.php:
>------------------------------------------
>include_once ($sourcedir . '/Errors.php');
>include_once ($sourcedir . '/Subs.php');
>include_once ($sourcedir . '/Load.php');
>------------------------------------------
You should probably quote the lines above this block, too.
------------------------------------------
(Line #031) $full_yabbse_path = '.';
(Line #048) include_once ($full_yabbse_path . '/Settings.php');
------------------------------------------
and you should quote Settings.php:
------------------------------------------
(Line #067) $sourcedir = "/home/something/board/Sources";
------------------------------------------
so before Errors.php is included, $sourcedir is *always* set to a value,
overwriting any variable that is passed through the URL.
>We can define $sourcedir variable through URL and include some other
>PHP script local or remote if remote inclusion is enabled in php.ini file.
>Bug in not exploitable if PHP's registar_globals is set to off.
see above - you can't
>Add this line before include_once() lines mentioned above.
>
>----cut here----
>if (!isset($sourcedir)) $sourcedir = "";
>----cut here----
So you are setting $sourcedir to "" if it isn't set? Whats the point of
this?
The hole does *not* exist, as the variable $sourcedir is always set to a
value. Even if the user did not yet configure YaBB SE, $sourcedir is set to an
empty value.
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