SECUNIA ADVISORY ID: SA46368 VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/46368/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=46368 RELEASE DATE: 2011-10-15DESCRIPTION: Multiple vulnerabilities have been reported in the Barter component for Joomla!, which can be exploited by malicious users to conduct script insertion attacks and by malicious people to conduct cross-site scripting and SQL injection attacks. 1) Input passed via the "listing", "homeurl", and "paystring" POST parameters to index.php (when "option" is set to "com_listing" and "task" is set to "listingsave") is not properly sanitised before being used. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious data is being viewed. 2) Input passed via the "desired_quantity" parameter to index.php (when "option" is set to "com_listing", "task" is set to "offersave", and "item_id" is set to a valid id) is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site. 3) Input passed via the "category_id" parameter to index.php (when "option" is set to "com_listing" and "task" is set to "browse") is not properly sanitised before being used in SQL queries. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code. The vulnerabilities are reported in version 1.3. Other versions may also be affected. SOLUTION: Filter malicious characters and character sequences using a proxy. PROVIDED AND/OR DISCOVERED BY: Sid3^effects