Netgear FVS318 Router Multiple Vulnerabilities

Multiple Vulnerabilities in Netgear FVS318 Router ------------------------------------------------------------------------ SUMMARY The <http://www.netgear.com> Netgear FVS318 is "an easy to use, firewall/router designed for home users and small businesses". SecuriNews Research has found 2 vulnerabilities in the router, one allows bypassing the product's content filtering mechanism while the other allows injecting arbitrary HTML and/or JavaScript into the product's log files which can then be used to attack the administrator of the router. DETAILS Content Filtering Bypass: By using HEX encoded characters, it is possible to bypass the URL filter. For example, if the router administrator blocks the phrase ".exe"; a user can encode one or more characters in the URL phrase to bypass the filter. If we encode the 'x' in ".exe", the new phrase ".e%78e" will bypass the filter. Log File Arbitrary Content Injection: The content filter/log viewer contains a Cross Site Scripting vulnerability. When a user tries to access a blocked URL phrase, it is logged in the Security Log. If a user were to inject JavaScript into a blocked URL phrase, the JavaScript would be executed by the administrator's browser when the security log is viewed. Proof of Concept: If the router administrator has blocked the URL phrase ".exe", a user can inject JavaScript as follows: http://www.example.com/somefile.exe</textarea><script>alert(' XSS')</script> Note: The string "</textarea>" must be added before the injected JavaScript, as the security log is placed in a text area. ADDITIONAL INFORMATION The information has been provided by <mailto:advisories@securinews.com> Paul Kurczaba. The original article can be found at: <http://www.securinews.com/vuln.htm?vulnid=103> http://www.securinews.com/vuln.htm?vulnid=103 ======================================== This bulletin is sent to members of the SecuriTeam mailing list. To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com ==================== ==================== DISCLAIMER: The information in this bulletin is provided "AS IS" without warranty of any kind. In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.