XSS and Full Path Disclosure in MijoSearch Joomla Extension

[High-Tech Bridge Security Research <advisory@xxxxxxxxxxxx>]

Advisory ID: HTB23186
Product: MijoSearch
Vendor: Mijosoft
Vulnerable Version(s): 2.0.1 and probably prior
Tested Version: 2.0.1
Advisory Publication:  November 25, 2013  [without technical details]
Vendor Notification: November 25, 2013 
Public Disclosure: December 16, 2013 
Vulnerability Type: Cross-Site Scripting [CWE-79], Information Exposure Through 
Externally-generated Error Message [CWE-211]
CVE References: CVE-2013-6878, CVE-2013-6879
Risk Level: Medium 
CVSSv2 Base Scores: 4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N), 4.3 
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Discovered and Provided: High-Tech Bridge Security Research Lab ( 
https://www.htbridge.com/advisory/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered 2 vulnerabilities in 
MijoSearch Joomla Extension, which can be exploited to gain access to 
potentially sensitive data and perform Cross-Site Scripting (XSS) attacks 
against users of vulnerable application.


1) Cross-site Scripting in MijoSearch: CVE-2013-6878

The vulnerability exists due to insufficient sanitisation of user-supplied data 
appended to "/component/mijosearch/search" URL. A remote attacker can trick a 
logged-in user to open a specially crafted link and execute arbitrary HTML and 
script code in browser in context of the vulnerable website.

The following exploitation example uses the JavaScript alert() function to 
display "ImmuniWeb" word:

http://[host]/component/mijosearch/search?query=im%22%3E%3Cdiv%20onmouseover=alert%28%22ImmuniWeb%22%29%20style=%22width:100%;height:10000px;z-index:100%22%3E%3C/div%3E&limit=15&order=relevance&orderdir=desc


2) Information Exposure Through Externally-generated Error Message in 
MijoSearch: CVE-2013-6879

The vulnerability exists due to improper implementation of error handling 
mechanisms in "/component/mijosearch/search" URL. A remote attacker can send a 
specially crafted HTTP GET request to the vulnerable web application and gain 
knowledge of full installation path of the application. 

The following exploitation example displays a warning message and installation 
path (if PHP "display_errors" is on)

http://[host]/component/mijosearch/search?query=im%22%3Eimmuniweb&limit=15%27%22%3Cb%3Eimmuniweb&order=relevance%27%22%3Cb%3Eimmuniweb&orderdir=desc%27%22%3Cb%3Eimmuniweb

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Solution:

Currently we are not aware about any vendor-supplied patches or solutions. It's 
recommended to deactivate the vulnerable extension.

Vendor notification and disclosure timeline:

2013-11-25 
   Vendor notified via online ticket system
   Vendor denies any vulnerabilities
   Vendor authorizes us to test his website
   Vulnerabilities reproduced (screenshots available)
   Vendor still denies the vulnerabilities
2013-11-26 
   Vendor provided with exact version of vulnerable system
   Vendor still denies the vulnerabilities
   Vendor refuses to collaborate
   Vendor refuses to confirm other vulnerable version(s)
   Vendor bans one of our IPs on online ticket system
2013-12-14 
   Vendor suspends our user account on online ticket system 
   Vendor contacted again by all available emails
2013-12-16 
   No single reply from the vendor.


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References:

[1] High-Tech Bridge Advisory HTB23186 - 
https://www.htbridge.com/advisory/HTB23186 - Multiple Vulnerabilities in 
MijoSearch.
[2] MijoSearch - 
http://mijosoft.com/joomla-extensions/mijosearch-joomla-search-engine - 
MijoSearch is flexible and powerful Joomla Search component with an easy-to-use 
interface.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - 
international in scope and free for public use, CVE® is a dictionary of 
publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to 
developers and security practitioners, CWE is a formal list of software 
weakness types.
[5] ImmuniWeb® - http://www.htbridge.com/immuniweb/ - is High-Tech Bridge's 
proprietary web application security assessment solution with SaaS delivery 
model that combines manual and automated vulnerability testing.

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Disclaimer: The information provided in this Advisory is provided "as is" and 
without any warranty of any kind. Details of this Advisory may be updated in 
order to provide as accurate information as possible. The latest version of the 
Advisory is available on web page [1] in the References.