######################################## #Vulnerability Title: Stored Server XSS in ZyXEL SBG-3300 Security Gateway #Date: 02/10/2014 #CVE-ID: CVE-2014-7277 #Product: ZyXEL SBG3300-N series #Vendor: www.zyxel.com #Affected Firmware: Latest version at the time of disclosure V1.00(AADY.4)C0 and below (tested) #Patch: Unpatched #Authored by: Mirko Casadei ######################################## #Disclosure Timeline: 13/08/2014 Vendor Contact with Acknowledgment 13/09/2014 No response from Vendor after first contact 02/10/2014 Full Disclosure #Technical details: The web interface of the Security Gateway is affected by a Stored Server XSS vulnerability in the main login page. Abusing the login 'welcome message' form, an attacker can inject the XSS in HTML code. Example of a working code: ... <span class="title_index">Welcome</span><br> <li id="loginMessage"><img src=x onerror=alert('XSS') /></li> ... #Remediation The vulnerable form should sanitize input. ########################################