Eggblog v3.1.0 XSS Vulnerability
H - Security Labs
Eggblog v3.1.0 Security Advisory
ID : HSEC#20071111
General Information
--------------------------
Name : EggBlog v.3.1.0
Vendor HomePage :http://sourceforge.net/projects/eggblog/
Platforms : PHP && MySQL
Vulnerability Type : Input Validation Error
Timeline
-------------------------
08 October 2007 -- Vendor Contacted
30 October 2007 -- Vendor Replied
11 November 2007 -- New Release
11 November 2007 -- Advisory Released
What is Eggblog
------------------------
eggblog is a free PHP & MySQL blogging package. Features include an internal
search engine,
photo albums, forums, plug-ins, guest comments to blog articles, automatic
monthly archiving
of blog articles and RSS XML feeds for both the blog and forums.
I discovered the security holes when I was testing it for my personel web blog.
Vulnerability Overview
------------------------
The script is vulnerable to XSS attacks.
Details About Vulnerability
------------------------
XSS Vulnerability(home/rss.php)
At the rss.php line 6-7; there are unfiltered PHP_SELFs that can be used for
XSS attacks.
---------
<a
href=\"../rss/blog.php\">".$_SERVER['SERVER_NAME'].str_replace("/home/rss.php","",$_SERVER['
PHP_SELF'])."/rss/blog.php</a></li>
<a
href=\"../rss/topics.php\">".$_SERVER['SERVER_NAME'].str_replace("/home/rss.php","",$_SERVER
['PHP_SELF'])."/rss/topics.php</a></li>
---------
The attacker can succesfully launch XSS attacks with loading payload on to the
URL after the
home\rss.php. For example :
http://www.example.com/home/rss.php/<script>alert(1)</script>
Solutions
-----------------------
Download the new release : EggBlog v3.1.1
Credits
-----------------------
The vulnerabilities found on 08 October 2007
by Mesut Timur <mesut@xxxxxxxxxx>
H - Security Labs , http://www.h-labs.org
Gebze Institue of Technology,Computer Engineering,http://www.gyte.edu.tr
References
-----------------------
http://sourceforge.net/forum/forum.php?forum_id=753622
http://www.eggblog.net
http://sourceforge.net/projects/eggblog/
Original Advisory :
http://www.h-labs.org/blog/2007/11/11/eggblog_v3_1_0_xss_issues.html
Mesut TIMUR
http://www.h-labs.org
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