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[MajorSecurity #23] BLOG:CMS <= 4.0.0j - XSS and cookie disclosure
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Software: BLOG:CMS
Version: 4.0.0j
Type: Cross site scripting
Made public: July, 22th 2006
Vendor: F-ART AGENCY, Ltd. - Radek Hulбn
Page: http://blogcms.com/
Credits:
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Discovered by: David Vieira-Kurz
http://www.majorsecurity.de
Original Advisory:
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http://www.majorsecurity.de/advisory/major_rls23.txt
Affected Products:
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BLOG:CMS 4.0.0j and prior
Description:
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BLOG:CMS is the most complete, feature-packed, personal publishing system on the market, developed by Radek Hulбn. It
includes state-of-the-art weblog, forum, wiki engine, news aggregator (atom /rss), and photo gallery.
Requirements:
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register_globals = On
Vulnerability:
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Input passed directly to the "id" parameter is not properly sanitised before being returned to the user.
This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
It works with a script code like this:
>'><script>alert('MajorSecurity')</script><
!--
Solution:
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Edit the source code to ensure that input is properly sanitised.
You should work with "htmlspecialchars()" or "htmlentities()" php-function to ensure that html tags
are not going to be executed. You should also work with the "intval()" php-function to ensure that the input
is numeric.
Example:
<?php
$pass = htmlentities($_POST['pass']);
echo htmlspecialchars("<script");
$id = intval($_POST['id']);
?>
Set "register_globals" to "Off".
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