============================================= INTERNET SECURITY AUDITORS ALERT 2013-009 - Original release date: March 15th, 2013 - Last revised: June 4th, 2013 - Discovered by: Manuel Garcia Cardenas - Severity: 4,8/10 (CVSS Base Score) - CVE-ID: CVE-2013-2621, CVE-2013-2623, CVE-2013-2624 ============================================= I. VULNERABILITY ------------------------- Multiple Vulnerabilities in Telaen <= 1.3.0 II. BACKGROUND ------------------------- Telaen is a webmail reader application supporting both IMAP and POP3 protocols. It can be installed without dependence of any PHP's extra modules or a separate database. It is Open source software published under GNU General Public License (GPL). The last version of Telaen is 1.3.0 released on January 2012. III. DESCRIPTION ------------------------- Telaen 1.3.0 and lower versions contain a flaw that allows a remote redirection attack. This flaw exists because the application does not properly sanitise the file "redir.php". This allows an attacker to create a specially crafted URL, that if clicked, would redirect a victim from the intended legitimate web site to an arbitrary web site of the attacker's choice. Aditionaly, it has been detected a reflected XSS vulnerability in Telaen 1.3.0 and lower versions, that allows the execution of arbitrary HTML/JavaScript code to be executed in the context of the victim user's browser. The code injection is done through the parameter "f_email" in the page index.php. Due to the errors caused by the application Telaen 1.3.0 and lower versions, we can display the full webapp installation path. IV. PROOF OF CONCEPT ------------------------- REDIRECT: http://vulnerablesite.com/telaen/redir.php?http://www.malicious-site.com XSS: http://vulnerablesite.com/telaen/index.php?tid=default&lid=en_UK&f_email="><script>alert("XSS")</script> FULL PATH DISCLOSURE: http://vulnerablesite.com/telaen/inc/init.php V. BUSINESS IMPACT ------------------------- REDIRECT: An attacker can redirect any user to any malicious website. Below I have mentioned the vulnerable URL. XSS: An attacker can execute arbitrary HTML or JavaScript code in a targeted user's browser, this can leverage to steal sensitive information as user credentials, personal data, etc. FULL PATH DISCLOSURE: An attacker can obtain the full path to the applitation and if the webroot is getting leaked, attackers may abuse the knowledge and use it in combination with file inclusion vulnerabilites to steal configuration files regarding the web application or the rest of the operating system. VI. SYSTEMS AFFECTED ------------------------- Versions of Telaen < v1.3.1. VII. SOLUTION ------------------------- REDIRECT AND XSS: All data received by the application and can be modified by the user, before making any kind of transaction with them must be validated. FULL PATH DISCLOSURE: Turn off display errors in the configuration and unify the error pages. VIII. REFERENCES ------------------------- http://www.telaen.com http://www.isecauditors.com IX. CREDITS ------------------------- This vulnerability has been discovered by Manuel Garcia Cardenas (mgarcia (at) isecauditors (dot) com). X. REVISION HISTORY ------------------------ March 15, 2013: Initial release. June 4, 2013: Last release XI. DISCLOSURE TIMELINE ------------------------- March 15, 2013: Vulnerability acquired by Internet Security Auditors (www.isecauditors.com) March 20, 2013: Sent to Devel Team. March 28, 2013: Schedule for new version. April 4, 2013: New version published. June 3, 2013: Advisory sent to lists. XII. LEGAL NOTICES ------------------------- The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Internet Security Auditors accepts no responsibility for any damage caused by the use or misuse of this information. XIII. ABOUT ------------------------- Internet Security Auditors is a Spain based leader in web application testing, network security, penetration testing, security compliance implementation and assessing. Our clients include some of the largest companies in areas such as finance, telecommunications, insurance, ITC, etc. We are vendor independent provider with a deep expertise since 2001. Our efforts in R&D include vulnerability research, open security project collaboration and whitepapers, presentations and security events participation and promotion. For further information regarding our security services, contact us. XIV. FOLLOW US ------------------------- You can follow Internet Security Auditors, news and security advisories at: https://www.facebook.com/ISecAuditors https://twitter.com/ISecAuditors http://www.linkedin.com/company/internet-security-auditors http://www.youtube.com/user/ISecAuditors