Overview

The DIR-635 revB has multiple vulnerabilities that allow a malicious attacker to access Web-GUI configuration by authenticated and unauthenticated connections. which may cause the device to malfunction or not operate.

D-Link Security Incident Reponse Policy

All public communication on this issue will be offered at : http://securityadvisories.dlink.com/security/

Our security response team can be contacted for incident information or to report incidents at security@dlink.com

Any non-critical security issue, help in updating firmware, or configuration regarding this issue please contact your D-Link Customer care channel.

Reference

Author : Michael Messnerr - http://www.s3cur1ty.de  Advisiory - http://www.s3cur1ty.de/node/686

General Disclosure

Security and performance is of the utmost importance to D-Link across all product lines. This is not just through the development process but also through regular firmware updates to comply with the current safety and quality standards. We are proactively working with the sources of these reports as well as continuing to review across the complete product line to ensure that the vulnerabilities discovered are addressed.  We will continue to update this page to include the relevant product firmware updates addressing these concerns. In the meantime, you can exercise the below cautions to avoid unwanted intrusion into your D-Link product.

Immediate Generai Recommendations for all D-Link router customers

 

• Do not enable the Remote Management feature since this will allow malicious users to use this exploit from the internet.  Remote Management is default disabled on all D-Link Routers and is included for customer care troubleshooting if useful and the customer enables it.
• If you receive unsolicited e-mails that relates to security vulnerabilities and prompt you to action, please ignore it. When you click on links in such e-mails, it could allow unauthorised persons to access your router. Neither D-Link nor its partners and resellers will send you unsolicited messages where you are asked to click or install something.
• Make sure that your wireless network is secure.
• Do not provide your admin password to anyone. If required we suggest updating the password frequently.

Description

Please read the details from the author at: http://www.s3cur1ty.de/node/686

Details are left to  the authors original disclosure to avoid miscommunication and duplicaation of work and ownership. We offer the following as a summary pulled from the authors linked document.

- Stored XSS -> Status - WLAN -> SSID - Injecting scripts into the parameter config.wireless%5B0%5D.ssid_profiles%5B0%5D.ssid reveals that this parameter is not properly validated for malicious input. You need to be authenticated or you have to find other methods for inserting the malicious JavaScript code.

- Reflected XSS via Extras -> system Check -> Ping - Injecting scripts into the parameter data reveals that this parameter is not properly validated for malicious input.

-  For changing the current password there is no request to the current password - With this vulnerability an attacker is able to change the current password without knowing it. The attacker needs access to an authenticated browser.

- CSRF for changing the password without knowing the current one and the attacker is able to activate the remote management.

Affected Products

Model Name	HW Version	Current FW Version	New FW Version for this exploit fix
DIR-635	Rev. B1	Ver. 2.34EU and Older	Under Investigation

Security patch for your D-Link router

These firmware updates address the security vulnerabilities in affected D-Link routers. D-Link will update this continually and we strongly recommend all users to install the relevant updates.

As there are different hardware revisions on our products, please check this on your device before downloading the correct corresponding firmware update. The hardware revision information can usually be found on the product label on the underside of the product next to the serial number. Alternatively, they can also be found on the device web configuration.

To update the firmware please log-in to the Web-GUI interface of your device, from the menu select Maintanence -> System -> Upgrade Firmware. If you require help please contact your regional D-Link customer care website for options.