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Document Title: =============== Barracuda Networks Message Archiver 650 - Persistent Input Validation Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=751 https://www.barracuda.com/support/knowledgebase/501600000013lXe Barracuda Networks Security ID (BNSEC): 703 BNSEC-00703: Remote authenticated persistent XSS in Barracuda Message Archiver v3.2 Solution #00006604 Release Date: ============= 2014-07-18 Vulnerability Laboratory ID (VL-ID): ==================================== 751 Common Vulnerability Scoring System: ==================================== 3.6 Product & Service Introduction: =============================== The Barracuda Message Archiver is a complete and affordable email archiving solution, enabling you to effectively index and preserve all emails, enhance operational efficiencies and enforce policies for regulatory compliance. By leveraging standard policies and seamless access to messages, email content is fully indexed and backed up to enable administrators, auditors and end users quick retrieval of any email message stored in an organization塜 email archive. * Comprehensive archiving * Exchange stubbing * Search and retrieval * Policy management * Intelligent Storage Manager * Roles-based interface * Reporting and statistics The Barracuda Message Archiver provides everything an organization needs to comply with government regulations in an easy to install and administer plug-and-play hardware solution. The Barracuda Message Archiver stores and indexes all email for easy search and retrieval by both regular users and third-party auditors. Backed by Energize Updates, delivered by Barracuda Central, the Barracuda Message Archiver receives automatic updates to its extensive library of virus, policy definitions to enable enhanced monitoring of compliance and corporate guidelines, document file format updates needed to decode content within email attachments, as well as security updates for the underlying Barracuda Message Archiver platform to protect against any potential security vulnerabilities. (Copy of the Vendor Homepage: http://www.barracudanetworks.com ) Abstract Advisory Information: ============================== The Vulnerability Laboratory Research Team discovered a persistent web vulnerability in Barracudas Messsage Archiver 3.2 Appliance Application. Vulnerability Disclosure Timeline: ================================== 2013-11-08: Researcher Notification & Coordination (Benjamin Kunz Mejri) 2013-11-10: Vendor Notification (Barracuda Networks - Bug Bounty Program) 2013-11-13: Vendor Response/Feedback (Barracuda Networks - Bug Bounty Program) 2014-06-31: Vendor Fix/Patch (Barracuda Networks Developer Team - Reward: $$$) 2014-00-00: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Barracuda Networks Product: Message Archiver 650 - Appliance Application 3.1.0.914 Exploitation Technique: ======================= Remote Severity Level: =============== Medium Technical Details & Description: ================================ A persistent input validation web vulnerability has been discovered in the official Barracuda Networks Message Archiver 650 v3.2 appliance web-application. The remote vulnerability allows remote attackers to inject own malicious script codes on the application-side of the vulnerable application module. The vulnerability is located in the `Benutzer > Neu Anlegen > Rolle: Auditor > Dom瓣nen` module. Remote attackers are able to inject own malicious script codes in the vulnerable domain_list_table-r0 values. The execution of the script code occurs in the domain_list_table-r0 and user_domain_admin:1 appliance application response context. The request method is POST and the attack vector is persistent on the application-side of the barracuda networks message archiver web appliance. The security risk of the persistent input validation web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.6. Exploitation of the vulnerability requires a low privileged or restricted application user account with low or medium user interaction. Successful exploitation of the vulnerability results in session hijacking, persistent phishing, persistent external redirects and persistent manipulation of module context. Request Method(s): [+] POST Vulnerable Module(s): [+] Benutzer > Neu Anlegen > Rolle: Auditor Vulnerable Input(s): [+] Dom瓣nen Vulnerable Parameter(s): [+] domain_list_table-r0 Affected Module(s): [+] Rolle: Auditor Listing Proof of Concept (PoC): ======================= The persistent web vulnerability can be exploited by remote attackers with low privileged or restricted application user account and low required user inter action. For security demonstration or to reproduce the remote web vulnerability follow the provided information and steps below to continue. --- PoC Session Logs [POST] --- ajax_bc_sub=addDomain domain=%22%3E%3Ciframe%20src%3Dhttp%3A%2F%2Fvuln-lab.com%20onload%3Dalert(document.cookie)%20%3C%20%20%22%3E%3Ciframe%20src %3Dhttp%3A%2F%2Fvuln-lab.com%20onload%3Dalert(document.cookie)%20%3C user=guest password=75361da9533223d9685576d10bd6aa02 et= 1352520628 locale=de_DE realm= auth_type=Local primary_tab=USERS secondary_tab=per_user_add_update PoC (URL): http://archiver.ptest.localhost:3378/cgi-mod/index.cgi?auth_type=Local&et=1352520461&locale=de_DE&password=4b0a7f3a136e60c7cf73ec1b30ec6a23& primary_tab=USERS&realm=&secondary_tab=per_user_add_update&user=benjaminKM PoC: Benutzer > Neu Anlegen > Rolle: Auditor > Dom瓣nen > (domain_list_table-r0) <td style="vertical-align:middle;text-align:left;white-space:nowrap"> %20&#8203;&#8203;&#8203;&#8203;&#8203;">&#8203;&#8203;&#8203;&#8203;&#8203;<iframe src="http://vuln-lab.com" onload="alert(document.cookie)" <="" "="[PERSISTENT INJECTED SCRIPT CODE!]< </iframe><input name="user_domain_admin:1" id="user_domain_admin:1" value=""[PERSISTENT INJECTED SCRIPT CODE!]" type="hidden"></td> Reference(s): http://archiver.ptest.localhost:3378/cgi-mod/index.cgi http://archiver.ptest.localhost:3378/cgi-mod/index.cgi?auth_type=Local&et=1352520461&locale=de_DE&password=4b0a7f3a136e60c7cf73ec1b30ec6a23& primary_tab=USERS&realm=&secondary_tab=per_user_add_update&user=benjaminKM_0ne Solution - Fix & Patch: ======================= The vulnerability can be patched by a secure parse and encode of the vulnerable affected listing in the domain_list_table-r0 parameter(s). Barracuda Networks Appliance: Advanced >Firmware Updates Page https://www.barracuda.com/support/knowledgebase/501600000013lXe Security Risk: ============== The security risk of the application-side input validation web vulnerability is estimated as medium. Credits & Authors: ================== Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri ([email protected]) [www.vulnerability-lab.com] Disclaimer & Information: ========================= 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. 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