D-Link DSL-2740B routers contain a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site request forgery attacks. Updates are not available.
A vulnerability in D-Link DSL-2740B routers running firmware version EU_1.00, and possibly other versions, could allow an unauthenticated, remote attacker to conduct cross-site request forgery (CSRF) attacks.
The vulnerability is due to improper validation of certain user-supplied HTTP requests by the affected software. An attacker could exploit the vulnerability by convincing an authenticated user to visit a malicious website. If successful, the attacker could conduct CSRF attacks and perform unauthorized actions on behalf of user who is logged in to the targeted device. Successful exploitation could allow the attacker to conduct further attacks.
Proof-of-concept code that exploits the vulnerability is publicly available.
D-Link has not confirmed this vulnerability and updates are not available.
Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.
The security vulnerability applies to the following combinations of products.
D-Link Systems, Inc.
DSL-2740B ADSL Router
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.