DataLife Engine 9.7 (preview.php) PHP Code Injection Vulnerability

• Software Link:

http://dleviet.com

• Affected Version:

9.7 only.

• Vulnerability Description:

The vulnerable code is located in the /engine/preview.php script:

246$c_list = implode (',', $_REQUEST['catlist']);
247 
248if( strpos( $tpl->copy_template, "[catlist=" ) !== false ) {
249    $tpl->copy_template = preg_replace( "#\\[catlist=(.+?)\\](.*?)\\[/catlist\\]#ies", "check_category('\\1', '\\2', '{$c_list}')", $tpl->copy_template );
250}
251     
252if( strpos( $tpl->copy_template, "[not-catlist=" ) !== false ) {
253    $tpl->copy_template = preg_replace( "#\\[not-catlist=(.+?)\\](.*?)\\[/not-catlist\\]#ies", "check_category('\\1', '\\2', '{$c_list}', false)", $tpl->copy_template );
254}

User supplied input passed through the $_REQUEST[‘catlist’] parameter is not properly sanitized before being used in a preg_replace() call with the e modifier at lines 249 and 253. This can be exploited to inject and execute arbitrary PHP code. Successful exploitation of this vulnerability requires a template which contains a “catlist” (or a “not-catlist”) tag.

• Solution:

Apply the vendor patch: http://dleviet.com/dle/bug-fix/3281-security-patches-for-dle-97.html

• Disclosure Timeline:

[16/01/2013] – Vendor notified
[19/01/2013] – Vendor patch released
[20/01/2013] – CVE number requested
[21/01/2013] – CVE number assigned
[28/01/2013] – Public disclosure

• CVE Reference:

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2013-1412 to this vulnerability.

• Credits:

Vulnerability discovered by Egidio Romano.