WordPress Core 3.1.3 – SQL Injection
SEC Consult Vulnerability Lab Security Advisory < 20110701-0 > ======================================================================= title: Multiple SQL Injection Vulnerabilities product: WordPress vulnerable version: 3.1.3/3.2-RC1 and probably earlier versions fixed version: 3.1.4/3.2-RC3 impact: Medium homepage: http://wordpress.org/ found: 2011-06-21 by: K. Gudinavicius SEC Consult Vulnerability Lab https://www.sec-consult.com ======================================================================= Vendor description: ------------------- "WordPress was born out of a desire for an elegant, well-architectured personal publishing system built on PHP and MySQL and licensed under the GPLv2 (or later). It is the official successor of b2/cafelog. WordPress is fresh software, but its roots and development go back to 2001." Source: http://wordpress.org/about/ Vulnerability overview/description: ----------------------------------- Due to insufficient input validation in certain functions of WordPress it is possible for a user with the "Editor" role to inject arbitrary SQL commands. By exploiting this vulnerability, an attacker gains access to all records stored in the database with the privileges of the WordPress database user. Proof of concept: ----------------- 1) The get_terms() filter declared in the wp-includes/taxonomy.php file does not properly validate user input, allowing an attacker with "Editor" privileges to inject arbitrary SQL commands in the "orderby" and "order" parameters passed as array members to the vulnerable filter when sorting for example link categories. The following URLs could be used to perform blind SQL injection attacks: http://localhost/wp-admin/edit-tags.php?taxonomy=link_category&orderby=[SQL injection]&order=[SQL injection] http://localhost/wp-admin/edit-tags.php?taxonomy=post_tag&orderby=[SQL injection]&order=[SQL injection] http://localhost/wp-admin/edit-tags.php?taxonomy=category&orderby=[SQL injection]&order=[SQL injection] 2) The get_bookmarks() function declared in the wp-includes/bookmark.php file does not properly validate user input, allowing an attacker with "Editor" privileges to inject arbitrary SQL commands in the "orderby" and "order" parameters passed as array members to the vulnerable function when sorting links. The following URL could be used to perform blind SQL injection attacks: http://localhost/wp-admin/link-manager.php?orderby=[SQL injection]&order=[SQL injection] Vulnerable / tested versions: ----------------------------- The vulnerability has been verified to exist in version 3.1.3 of WordPress, which is the most recent version at the time of discovery. Vendor contact timeline: ------------------------ 2011-06-22: Contacting vendor through security () wordpress org 2011-06-22: Vendor reply, sending advisory draft 2011-06-23: Vendor confirms security issue 2011-06-30: Vendor releases patched version 2011-07-01: SEC Consult publishes advisory Solution: --------- Upgrade to version 3.1.4 or 3.2-RC3 Workaround: ----------- A more restrictive role, e.g. "Author", could be applied to the user. Advisory URL: ------------- https://www.sec-consult.com/en/advisories.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Unternehmensberatung GmbH Office Vienna Mooslackengasse 17 A-1190 Vienna Austria Tel.: +43 / 1 / 890 30 43 - 0 Fax.: +43 / 1 / 890 30 43 - 25 Mail: research at sec-consult dot com https://www.sec-consult.com EOF K. Gudinavicius / @2011 |